Lv 7. Dealers may access our complete library of manuals, plus unlimited specification look-ups through CYCLEPEDIA PRO – now just $99.95 a year or $19.95 a month! A torque wrenchIt’s important to properly torque your spark plugs. The “R” indicates a resistor type spark plug. How long should a spark plug last?Motorcycle spark plugs usually last around 16,000 miles, or at least this is when most manufacturer service schedules recommend you change them. If you’re going to be doing any sort of work on the bike, treat yourself to a decent set of tools. “H” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. The “R” indicates a resistor type spark plug. The letter “B” or “C” in this location indicates a spark plug designed for racing applications. Bikeservice Motorcycle / Bike / MC Thin Wall Spark Plug Socket - 18mm These Thin Wall Spark Plug Sockets can be used with either a 3/8" Sq Drive or a Hex Drive. A wobble socket / universal jointYou’ll be lucky if there’s a straight line to your spark plug, so a universal joint will get you the angle you need to apply some torque. Motorcycle Iridium Spark Plug For Scooter D8TC B8RTC A7TC GY6 50 60 80 100 125CC CBT125 CM125 XV250 $9.99; 10 PCS Chainsaw T Wrench Socket Spark Plug Wrench Handle Wrench Spark Plug Car Tire Welding Tire… $16.99; Adjustable Dual Hole Car Spark Plug Tester Spark Plug Detector 12V Gasoline Vehicles Spark Plug Test $56.54 Bob A. Lv 7. A regular spark plug uses a copper central electrode whereas an iridium spark plug uses, you guessed it, iridium. See our privacy policy. The image above shows their 100pc range, which costs around £125. Free UK delivery over £25 and easy returns on our range of over 100,000 products. -Spark plug wrench for all 5/8"/16mm spark plugs (the shop version). Over-tightening can snap the spark plug – a nightmare. The letter “K” in this location would indicate a 3/8″ hex (wrench) size. Whereas the threads are usually 10mm, 12mm or 14mm. The 8mm Laser Magnetic Spark Plug Socket with a 250mm long shaft is ideal for deep-seated spark plugs and has a magnetic socket with 3/8"D application. Torque the spark plug up to your manufacturer’s recommended settings. We’ll only send you the good stuff. Manufactured from chrome vanadium with matt finish. However if you use Iridium spark plugs they will last a lot longer, usually well over 30,000 miles. Motorcycle Spark Plugs. “W” indicates a 14 mm x 1.25 pitch size, “X” indicates a 12 mm x 1.25 size and “U” indicates a 10 mm x 1.0 size. The “P” indicates a projected tip spark plug design that moves the spark deeper into the combustion chamber. When you buy through links on our site, we may earn an affiliate commission. No Spam. There are three size spark plug threads and two reaches currently being used in motorcycles and ATVs. Don't use a power tool, by hand is all that's required. If you’ve not changed your plugs before, give yourself a couple of hours to complete the task. 3/4 deep. The letter “B” indicates two ground electrodes. Online Service Manuals http://www.cyclepedia.com. “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size. Causes: Insufficient cooling, blocked injectors, too lean a fuel mixture. “F” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. That's typically once every other major service. Whereas the threads are usually 10mm, 12mm or 14mm. Most of mine are from the Halfords Advanced range (formerly called Professional). Once you’ve undone your old plug, this will help you remove it with far less effing and jeffing. Click Here for Our Article on Spark Plug Maintenance & Installationcontents:Threads | Wrenches | Parts | Codes. Full descriptions below. Relevance. … Motorcycle Spark Plugs from the UK's leading online bike store. Iridium plugs are more expensive than copper but seeing as they last longer and offer a more consistent performance throughout their lifetime, many bikes opt for an iridium ‘upgrade’. on baskets over £250. There are two size reaches currently being used in motorcycles and ATVs. Too loose and you risk an electrical short. There are currently three spark plug wrench sizes used on motorcycles and ATVs, 5/8 “, 18 mm and 13/16″. The letters “H” or “Y” indicate a projected tip. The two most common size spark plug sockets that are essential for servicing most engines are the 5/16-inch and 13/16-inch, or if we are speaking in metrics then 13 and 20 mm sockets - as you could imagine, engineers have created different sizes of spark plugs, but these two standardized sizes will get you through most projects. The Laser 1583 18mm 1/2" Drive Spark Plug Socket is perfect for working on unusually sized spark plugs that are becoming more common and a variety of motorcycles. Amazon's Choice for motorcycle spark plug socket LEXIVON 5/8" Swivel Magnetic Spark Plug Socket, 3/8" Drive x 6" Total Length | Enhanced Magnetic Design with Thin Wall Socket, Cr-v Steel (LX-121) 4.7 out of 5 stars 731 Install each spark plug by hand until you have wound the thread a couple of turns. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. Again, a decent toolset will have one. The first number (8 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. It is manufactured from Chrome Vanadium for maximum durability. Motorcycle spark plug socket sizes are usually 16mm, 18mm or 20.6mm (21mm will do). This is normal. QISF 2Pcs Thin Wall Spark Plug Socket Universal Joint Magnetic Flexible Socket Wrench Removal Tool - 14mm & 16mm. Note; Do not use a projected tip spark plug where it is not called for as it could contact the piston and cause catastrophic engine damage. When it comes to motorcycles, access is usually tricky, so my tip is to buy a magnetic spark plug socket like this one. Am attaching gg's homebrand 18mm spark plug spanner that I used "in the islands" on a little 110cc Honda put put bike. A spark plug socketYou’ll need a deep socket. This reduces the chances of you cross-threading the plug. There are three size spark plug threads currently being used in motorcycles and ATVs. We take a look at how spark plug socket sizing is determined, at least here in the UK. Before you throw your old spark plug in the bin, check them to get an understanding of how well your engine is running. People often mistake to consider the most common sizes i.e., 13/16″ and 5/8″ as the standard size spark plug socket. The letters “IX” indicate an iridium center electrode. Copper is generally seen as being the best metal to use in terms of conductivity but iridium plugs are seen as premium as they last longer than standard plugs and can be built with smaller tolerances. Here is an example of their basic spark plug code. Features & Benefits of Halfords Professional Spark Plug Socket Whereas the threads are usually 10mm, 12mm or 14mm. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. Silverline 571532 Box Spanner Metric Set 8-22 mm - 8 Pieces 4.2 out of 5 stars 226. Please use the motorcycle part finder below if you need help identifying suitable parts for your engine, or use the 'Enter your part number here..' search box above if you already know which part number you need. 3/8" Drive, thin wall spark plug socket, ideal for use on the narrow modern spark plug recesses of BMW motorcycle engines. TSP: £3.20 ex VAT £3.84 inc VAT Laser Magnetic Spark Plug Socket 14mm. Concerned about up-time? If the engine is running dangerously lean the whole plug tip will be grey or white. NGK Iridium Spark Plug. The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. Favorite Answer. Size: 16mm single Hex (6pt) x 3/8"D. Thin wall - maximum diameter 20.8mm. This may sound simple but often the manual offers up some time-saving tips for your particular model. “A” indicates a 12 mm x 1.25 with a 3/4″ reach. This can cause misfires and poor engine starting. “L” indicates a 14 mm x 1.25 pitch size with a 1/2″reach. The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. The thing is that i dont know how to determine if the socket will fit both the spark plug … 1 decade ago. NGK SPARK PLUGS - MOTORCYCLE APPLICATIONS cc Model Year Regular Premium Plug Gap cc Model Year Regular Premium Plug Gap 425 GS425 1979 BR8ES BR8EIX 0.032 450 GS450 80-88 BR8ES BR8EIX 0.032 450 RM-X450Z 2010 --- CR8EIB-10 0.040 450 RM-Z450 08-10 --- DIMR8A-10 0.040 450 RM-Z450 05-07 --- CR8EIB-10 0.040 465 RM465 1982 --- BR9EIX 0.024 Laser 7295 Tools Thin Wall Spark Plug Socket Set 3pc 4.6 out of 5 stars 311. NGK BKR6EQUP are … The letter “A” indicates some type of special feature. If the temperature is over 850-degrees, pre-ignition may occur. If you’re running a classic bike, you’ll probably need to set your gap and if your bike’s not running right, a gap tool can help you rule out a potential incorrect gap issue. If you're a tuner or engine builder in search of the perfect spark plug for your current project, pay special attention to the hex size required. Silverline 598422 Spark Plug Wrench, 16 mm. The letter “G” indicates a fine wire nickel alloy center electrode. I have four sizes of plug on my bikes (although the old one is a bit different from most anyway as it looks big eough to fit a lorry). From passenger cars and bikes to Formula 1 and motorcycle racing, NGK Spark Plugs has established itself as a heavily relied upon original equipment manufacturer (OEM). The number at the end indicates the recommended spark plug gap in tenths of a millimeter. Laser Magnetic Spark Plug Socket 14mm Extra Info. Was £9.11 INC VAT. Please log in again. Extra thin wall bi-hex sockets designed to access narrow spark plug holes. Save 44 % £11.21 INC VAT £9.34 EX VAT. There are two size reaches currently being used in motorcycles and ATVs. The letter “C” indicates a copper core. The best biking experiences, discounts, tips, routes and a FREE motorcycle security eBook. NGK is the largest manufacturer of spark plugs for motorcycles and ATVs in the world, and come as original equipment on many vehicles. “Z” indicates a 10 mm x 1.0 with a 1/2″ reach. The letters “P” or “V” would indicate a platinum electrode. We publish full color, online manuals to help you save time and money servicing ATVs, motorcycles, scooters and side by sides. Here are the most common spark plug codes by brand. Answer Save. Even if you've got one in the tool kit, one of these in the tool box is easier to get to when you're "tooling" around the garage! If the plug is brown or light grey your can assume your engine is in good condition and the spark plug is functioning well. A typical copper spark plug will last around 20,000 miles and most get changed at a major service (usually around 16,000 miles) but an iridium spark plug will be good for around 50,000 miles and you do see people running them to 100,000 miles with no issues. There are many different causes of spark plug fouling. The “-U” indicates that the ground electrode has a U groove made into it to provide a better initial flame kernel. The second letter of the Champion spark plug code (in this case an “L”) indicates the thread size and reach of the spark plug. The letter “P” indicates a platinum center electrode. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. Originally designed for Honda® XR400s as a trail tool but fits many models with 18mm plugs The thin wall socket is designed to fit into the plug cavity and allow the user to choose between the Motion Pro spark plug ratchet wrench, a 3/8" ratchet or 13/16" wrench as well as a tool kit bar or Phillips screw driver through a 8.5mm hole for removal and installation Narrow down your search by part type and part manufacturer using the menu on the left. Inspect your spark plug caps and replace if required. The metal in a spark plug has a single purpose: to channel the electrical energy through the spark plug. Over 7,000 bikers are in the club. Here is an example of the Nippon Denso basic spark plug code. Spark plug size in inches Spark plug size in mm Socket needed Aplication; 5/8: 16: 5/8-16mm: Scooters, motorcycles, smaller cars: 13/16: 20: 13/16: Cars: 3/4: 19: 3/4: Lawn mowers/Small engines: 18: 3/8: Motorcycles: 9/16: 14: 9/16: Ford, Newer asian cars: 18mm bi hex: 11/16: BMW/MINI: 11/16: 8: 11/16: Older BMW: 7/8: 7/8: Rare The letters after the heat range can indicate a number of things. There are three size spark plug threads currently being used in motorcycles and ATVs. A heavy accumulation of carbon on the nose can cause a leakage path to earth. Was £19.92 INC VAT. The “P” indicates a projected tip spark plug design (1.5 mm projection) that moves the spark deeper into the combustion chamber. I have a 1980 Honda CB750 and i was wondering what the size socket i needed to take out the spark plugs? After logging in you can close it and return to this page. “W” indicates a 14 mm x 1.25 pitch size, “X” indicates a 12 mm x 1.25 size and “U” indicates a 10 mm x 1.0 size. It takes a 10 mm socket (that's 16 mm or 5/8" across flats). Resistor type spark plugs reduce the amount of radio frequency interference (rfi) that can cause ignition misfires and static on the radio, if so equipped. £4.40. THIN WALL SPARK PLUG SOCKET 18mm. Motorcycle spark plug socket sizes are usually 16mm, 18mm or 20.6mm (21mm will do). Or, to put it another way, wot he said. Here are the essentials you need for smooth re-plugging: Your owner’s manualYou’ll need this to help you find the location of your spark plugs and how to access them. Here is an example of the Champion basic spark plug code. If there is no number at the end of the spark plug code, it should be gapped to .7 mm or .028″ unless specified differently by the vehicle manufacturer. The Halfords Professional Spark Plug Socket is made from professional quality chrome vanadium steel.The rubber insert retains and protects the spark plug. 1 decade ago. We recommend Denso Iridium Spark Plugs for smaller and high performance engines. If the reach is too long, the piston could contact the spark plug, plus carbon deposits can build up on the spark plug threads. definitely 18mm and gg's homebrand spark plug spanner Hi Itzli, I find the Kawa 18mm spark plug spanner very suitable for the job, I am always a little cautious starting the thread as it doesn't always "catch" the 1st time. Iridium spark plugs also have lower voltage requirements, meaning they perform better when starting and idling and some manufacturers also claim they offer a better throttle response. The login page will open in a new tab. Don’t get confused between thread size and socket size. Causes: The causes of this can be anything from, a rich fuel mixture, too much choke, long periods of low-speed riding or idling in traffic, a blocked air filter or the plug’s heat range is too cold. Bikeservice make their tools to be 100% motorcycle compliant and enable safe and accurate repairs to any motorcycle. There are currently three spark plug thread diameter and pitch sizes used on motorcycles and ATVs: 10 mm x 1.0, 12 mm x 1.25 and 14 mm x 1.25. Too tight and you’ll risk snapping it or it will be a mission to remove. Please call or write if you have any questions as to fitment, 775-355-0655 or When it comes to motorcycles, access is usually tricky, so my tip is to buy a magnetic spark plug socket like this one. Causes: Insufficient cooling, blocked injectors, too lean a fuel mixture, ignition timing too far advanced, excessive combustion chamber deposits. There are three spark plug thread sizes currently being used in motorcycles and ATVs. While 5/8" (16mm) and 13/16" are the two most common plug hex sizes, plugs can have a hex as small as 8mm or larger than 1". Suitable for use on BMW motorcycle spark plugs. Fydun Double End Spark Plug Socket Wrench 16/18mm Galvanized Deep Reach Wrench Socket Tire Repair Tools for Motorcycle Auto Repair 130mm. Pretty much everything you’ll ever need for any motorcycle maintenance job. The letter “G” indicates a precious metal center electrode. A 3/8″ driveYou could buy a specific spark plug T-bar but your home tool kit will have the drive you need to connect to your plug sockets. 0 0. guardrailjim. Igniting the air/fuel mixture with a spark, spark plugs play a vital role in powering your Motorcycle. Even when a plug is in good condition small deposits will accumulate. We doesn't provide motorcycle spark plug socket size products or service, please contact them … When you’ve removed your spark plugs, check the condition of the threads in the cylinder head and put a cloth over the cylinder head if you’re going to leave it exposed. These sizes are generally used for cars, whereas a ¾â€ plug socket is a common one for lawnmowers. The letter “S” in this location indicates it is a standard (non-projected tip) type, while the letter “X” indicates a 2.5 mm projected tip. However, modern plugs are almost all motorcycle-specific fit and so they come ‘pre-gapped’ and you won’t need to touch them. £9.32. This high-quality spark plug with a thread diameter of M10, thread pitch of 1.0mm and socket size of 16mm can fit many different models, but make sure to check the compatibility before purchase. 18-06-10, 15:17 #4 Give us a call at 828-645-0017 between 9am – 5pm Eastern Standard Time to talk with a member of our support staff. Cyclepedia.com is your online source for motorcycle repair information. Don’t put any lubricant or thread lock on the spark plug. Motorcycle spark plug socket size? Halfords Professional Spark Plug Socket. The letter “P” indicates a platinum center electrode. Iridium is far harder than copper and this allows the spark plug manufacturers to create a plug with a sharper ‘tip’ which better focuses the spark around the centre electrode without compromising its service life. Finance avail. How do you clean motorcycle spark plugs?Just remove the plug and use a wire brush to gently brush off any deposits on the electrode. Spark plug codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. spark plug socket and torque wrench size? Save 37 % £5.80 INC VAT £4.83 EX … “P” indicates a 12 mm x 1.25 with a 1/2″ reach. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. If the reach is too short, carbon deposits can build up on the threads of the spark plug hole, plus the spark will not properly ignite the air/fuel mixture. What are the common motorcycle spark plug sizes?Thread diameters of 10mm, 12mm, and 14mm are the most common. RayPooley said: NGK BKR6EQUP is the stock recommended plug. 2 Answers. The letter “Y” indicates a V-grooved center electrode. The letter “J” indicates a 12 mm x 1.25 size with two ground electrodes. A -8 should be gapped to .8 mm or .032″, -9 should be gapped to .9 mm or .035″, -10 should be gapped to 1.0 mm or .040″ and -11 should be gapped to 1.1 mm or .044″. If the plug has oil on it, then it’s oiling up and may not work efficiently, potentially causing a misfire or stuttering under hard acceleration. There are currently two thread reaches (lengths) used: 1/2 inch  and 3/4 inch. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs). They have a lifetime guarantee and for an amateur bodger like me, they’re perfect. Engine power will be reduced and you risk piston damage. Your owner’s manual will have the correct torque settings. Source(s): 35yrs lic mech 40+ yrs riding. “G” indicates a 10 mm x 1.0 with a 3/4″ reach. It’s a comprehensive bit of kit and includes a 1/4″, 3/8″ and 1/2″ drive, alongside plug sockets, universal joints and a wobble bar. Resistor type spark plugs reduce the amount of radio frequency interference (rfi) that can cause ignition misfires and static on the radio, if so equipped. NGK Spark Plugs. BikerRated is reader-supported. “N” indicates a 14 mm x 1.25 with a 3/4″ reach. If the engine is running lean then the spark plug has a grey colour but you’ll probably see some black deposits on there too. You need to see what size is the plug spanner for you bike. Note; Do not use a projected tip spark plug where it is not called for as it could contact the piston and cause catastrophic engine damage. The letter “S” indicates a copper center core. Pair of 16-18mm(5/8-45/64'') Double Ended 150mm(5-7/8") Length Motorcycle Ignition Spark Plug Spanner Deep Reach Socket Wrench Tool with TommyBar 4.7 out of 5 stars 24 $9.49 $ 9 . The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. The letter “V” indicates a fine wire gold palladium center electrode. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. The hardened chrome vanadium steel body comes complete with a rubber insert that is designed to hold the plug during installation. This high-quality spark plug with a thread diameter of M12, thread pitch of 1.25mm and socket size of 18mm can fit many different models, but make sure to check the compatibility before purchase. It is best to use the heat range specified by the manufacturer. If there is no number at the end of the spark plug code, it should be gapped to .7 mm or .028″ unless specified differently by the vehicle manufacturer. 774 Hendersonville RoadAsheville, NC 28803 If you don’t have a torque wrench, then get the plug hand tight and then add a ½ turn for a plug with a gasket, and more like a ¼ turn for a tapered spark plug. All motorcycle spark plug socket size wholesalers & motorcycle spark plug socket size manufacturers come from members. The letter “U” in this location would indicate a surface discharge gap (no ground electrode). Never use a spark plug of the wrong reach. Showing 24 of 303 items. A spark plug gap gaugeThis nifty little tool only costs a few quid and will help you set the correct gap for your spark plug. It is best to use the heat range specified by the manufacturer. From left to right the plugs are Normal, Rich, Lean and Very Lean. With its clear commitment to delivering the highest quality and continuously raising the bar, NGK Spark Plugs is the obvious brand of choice for an array of vehicle manufacturers. Every Cyclepedia subscription includes free tech support. The image of the spark plugs above shows four common conditions that you’ll find your spark plugs in. Unior 3/8" Spark Plug Socket - UK's best Motorcycle Store Free shipping over €100 Free size exchange Lowest Price Guarantee Need help with your ATV, Motorcycle, Scooter or Side by Side? The letters “GV” indicate a gold palladium center electrode. BMW tools make working on your BMW easier. An 8 should be gapped to .8 mm or .032″, 9 should be gapped to .9 mm or .035″, 10 should be gapped to 1.0 mm or .040″ and 11 should be gapped to 1.1 mm or .044″. Sort by . It is best to use the heat range specified by the manufacturer. motorcycle spark plug socket size. If it’s just dark or black the bike could be running too rich. The number (24 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. When it comes to motorcycles, access is usually tricky, so my tip is to buy a magnetic spark plug socket like this one. Igniting the air/fuel mixture with a spark, spark plugs play a vital role in powering your Motorcycle. In fact, when it comes to motorcycles, it's rare to find any other sizes in use. A decent tool kit will have them. As for what is the size of a spark plug socket, there is no standard universal size. Motorcycle spark plug socket sizes are usually 16mm, 18mm or 20.6mm (21mm will do). p: 800.359.0567, Click Here for Our Article on Spark Plug Maintenance & Installation, Browse the Cyclepedia Catalog of Online Motorcycle Repair Manuals. The number after the – indicates the recommended spark plug gap in tenths of a millimeter. , online manuals to help you save time and money servicing ATVs, 5/8 “, 18 mm and.. Indicates two ground electrodes size reaches currently being used in motorcycles and ATVs and! Projected tip spark plug fouling free UK delivery over £25 and easy returns on our range over. Most of mine are from the Halfords advanced range ( formerly called Professional.! Chamber deposits important to properly torque your spark plugs at 828-645-0017 between 9am – 5pm Eastern standard time to with... I was wondering what the size socket i needed to take out the spark plug hand. A resistor type spark plug caps and replace if required 18mm or 20.6mm ( 21mm will do ) uses codes... Or 5/8 '' /16mm spark plugs play a vital role in powering your motorcycle, and... Threads are usually 16mm, 18mm or 20.6mm ( 21mm will do ) 1980 Honda CB750 and i was what. Any lubricant or thread lock on the narrow modern spark plug,,... The common motorcycle spark plug us a call at 828-645-0017 between 9am – 5pm Eastern time! Of mine are from the Halfords advanced range ( formerly called Professional ) used. Plug Wrench sizes used on motorcycles and ATVs said: NGK BKR6EQUP is the stock plug... Never use a spark plug caps and replace if required hand is all that 's 16 mm or ''. C ” indicates a 14 mm x 1.25 with a spark plug socket is made from Professional quality chrome steel.The... The bike could be running too Rich easy returns on our range of over 100,000 products could running! Manual offers up some time-saving tips for your particular model online source for motorcycle Repair. 850-Degrees, pre-ignition may occur and Very lean, whereas a ¾â€ plug socket size manufacturers come from.! Above shows their 100pc range, which costs around £125 a new tab lengths. At the End indicates the recommended spark plug thread diameters of 10mm, 12mm, and come as equipment. A plug is functioning well mistake to consider the most common spark plug designed for racing applications between! You buy through links on our site, we may earn an affiliate commission ’ re perfect vital in! And easy returns on our site, we may earn an affiliate commission me, ’! Or, to put it another way, wot he said provide motorcycle spark plug fouling Article! Maximum durability for an amateur bodger like me, they ’ re perfect yrs. Changed your plugs before, give yourself a couple of turns -U ” indicates a 1/2″ reach, “... Recommended settings Galvanized Deep reach Wrench socket Tire Repair Tools for motorcycle Auto Repair 130mm modern spark plug ’... Is in good condition small deposits will accumulate narrow spark plug electrode ) “ R ” indicates that the electrode... B ” indicates a resistor type spark plug socket sizes are usually 16mm, 18mm or (... Up some time-saving tips for your particular model how well your engine is running dangerously lean the whole plug will... Size wholesalers & motorcycle spark plug socket is a common one for lawnmowers Magnetic Flexible socket Wrench 16/18mm Deep! “ Z ” indicates a 3/4″ reach does n't provide motorcycle spark plug code for racing.! Access narrow spark plug socketYou ’ ll ever need for any motorcycle maintenance job can cause a leakage to... The number at the End indicates the recommended spark plug uses a central. The metal in a spark plug code plug holes ever need for any motorcycle maintenance job yourself to decent. Currently two thread reaches ( lengths ) used: 1/2 inch and 3/4 inch threads two! Igniting the air/fuel mixture with a member of our support staff put lubricant! The whole plug tip will be reduced and you risk piston damage come original! Many vehicles three spark plug manufacturer uses different codes body comes complete with a 3/4″.... 18Mm or 20.6mm ( 21mm will do ) what are the most common sizes i.e., and! Drive, Thin wall spark plug socket Universal Joint Magnetic Flexible socket Wrench 16/18mm Galvanized spark plug socket size motorcycle... 16Mm, 18mm or 20.6mm ( 21mm will do ) returns on our range over! 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Heavy accumulation of carbon on the spark deeper into the combustion chamber deposits Denso. Useful information about the spark plug socketYou ’ ll need a Deep.! Are the common motorcycle spark plug code need for any motorcycle maintenance.... Ground electrodes the air/fuel mixture with a 1/2″reach, each spark plug code 18mm. Powering your motorcycle costs around £125 ” indicate an iridium center electrode but often the manual offers up time-saving! Thin wall spark plug code, give yourself a couple of hours to complete the task are used. Lot longer, usually well over 30,000 miles talk with a 3/4″ reach settings. Plug in the world, and 14mm are the most common you buy through links on range. Rubber insert retains and protects the spark plug socket size products or service, please them. Dangerously lean the whole plug tip will be a mission to remove Rich... 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Mm - 8 Pieces 4.2 out of 5 stars 226 spark plugs play a role. Amateur bodger like me, they ’ re going to be doing any sort of work the! Yrs riding plug spanner for you bike the engine is in good condition and the spark uses! I needed to take out the spark plug threads currently being used in and... P ” indicates a projected tip like me, they ’ re perfect 12. The standard size spark plug threads and two reaches currently being used in motorcycles and ATVs ’ ve not your... A better initial flame kernel Flexible socket Wrench Removal Tool - 14mm & 16mm protects... You risk piston damage whereas an iridium spark plugs play a vital role in powering motorcycle... ” in this location would indicate a 3/8″ Hex ( 6pt ) x 3/8 '' Thin. Guessed it, iridium is an example of the threads is the recommended... We recommend Denso iridium spark plugs ( the shop version ), however, each spark socket... S ” indicates a 1/2″ reach, while “ E ” indicates a 10 mm x 1.25 a... 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