Motorcycles - Popular Questions, Answers, Tips & Manuals


The most common issue is the spark plug boot shorts to the engine.

kawasaki VN 1500... | 294 views | 0 helpful votes


Hi, Jcholtz3232 and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the choke.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. Fuel injectors stuck open.
13. Quick disconnect check ball stuck.
14. Compression below 75 PSI.
15. A stuck-bent-burnt valve.
16. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
17. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
18. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
19. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections are loose or connected to the wrong cylinders.
20. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
21. Faulty neutral, clutch, kickstand safety switch.
22. Faulty fuel pump or fuse or relay.
23. Faulty or corroded run/stop switch.
24. Tilt sensor needs a reset.
25. Security system not disarming alarm needs a reset.
26. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
005 Sprint st 1050 Not starting
https://forum.motorcyclenews.com/topic/59860/triumph-sprint-st-1050-start-problem/2
Triumph Sprint ST Service Manual
https://www.triumphestore.com/
Triumph Sprint ST Owner Handbook Manual

2005 Triumph... | 213 views | 0 helpful votes


Hi, W32twood and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Faulty automatic choke.
8. Broken throttle return spring.
9. Damaged diaphragm or slide.
10. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector.
11. Multiple carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
think broke my scooter and it my only way of getting to work Please help...
gy6 carb for 150cc scooter engine
2006 Keeway ARN 125 150 Scooter Repair Manual Download Manuals Technical $22
http://www.family-motorsports.net/GY6-50cc-150cc.pdf free
Keeway Scooter Parts Racing Planet USA
http://absolutelyscooterparts.net/pdf/CGEN_dawg_scooter_manual.pdf

2008 Keeway Arn... | 161 views | 0 helpful votes


Hi, Asteris for more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Derbi GPR 50 Regulators eBay $27
regulator rectifier for Derbi Senda GPR Aprilia RX SX 50 Gilera RCR... $23
https://scootergrisen.dk/scooterhjemmeside/download/derbi_50cc_6speed_servicemanual.pdf
http://oem-parts.hu/en/parts/derbi/gpr-50
Derbi GPR 50 2009 Owner Handbook Manual

2008 Derbi GPR... | 200 views | 0 helpful votes


possible that the clutch needs adjusting so check that first
otherwise buy a workshop manual and see how to do the job

1987 Honda CBX... | 195 views | 0 helpful votes


Hi, Aylott you have an obscure motorcycle that has little to zero information out there in cyberland. For this reason, my answer may not be very helpful and I apologize for that.
For any more information about your question and possibly valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
JL50QT 5 Fighter Jinlun Scooter Parts Racing Planet USA
2010 Jinlun Jl50qt 4 No Spark No Power On CDI
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
Jinlun JL50QT 5 Fighter Scooter
Geely JL50QT 21 Owner Manual

Motorcycles | 483 views | 0 helpful votes


It's in your wiring you will have to chase it down hope this helps Merry Christmas

1993 Honda CB... | 126 views | 0 helpful votes


Hi, Dragoj for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
YAMAHA 2 TRAC TWO WHEEL DRIVE need more info please
https://www.yamaha-motor.eu/designcafe/en/about-bikes/off-road/index.aspx?view=article&id=441269
YAMAHA WR450F Owner Service Manual
Yamaha WR450F 2 TRAC Supplementary Owner Service Manual
https://www.partsfish.com/page/oem-parts-for-yamaha
YAMAHA WR450F Owner Manual

2005 Yamaha WR... | 374 views | 0 helpful votes


Hi, Steven for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Skyteam, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
2004 Skyteam ST 125 fuel and vacuum line diagram Google Search
Fuel and Vac Line Tutorial
Suzuki RM 125 Owner Service Manual
http://www.skyteamparts.com/store/st/125cc
http://mybikemanuals.com/suzuki

2004 Skyteam ST... | 115 views | 0 helpful votes


Hi, Jim the answer to this question is way above my pay grade for this situation, I would call or visit my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Suzuki LS650 Savage Service Repair Maintenance
https://www.partsfish.com/page/oem-parts-for-suzuki
http://mybikemanuals.com/suzuki
Suzuki LS 650 Savage
Suzuki Boulevard S40

2000 Suzuki LS... | 114 views | 0 helpful votes


Hi, Max probably, the true answer to this question is way above my pay grade for this situation, I would call or visit my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Original Suzuki TS TC TM Forum Index of documents My wiki test
OEM parts for Suzuki
http://suzukits.informe.com/gallery/74_owners
1977 Suzuki TC 185 home
Suzuki TS series

Suzuki... | 1,101 views | 1 helpful votes


Clean and synchronize the carbs.

1998 Honda VTR... | 927 views | 1 helpful votes


Hi, Frank and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty pulse coil.
8. Faulty CKP, CMP, or BAS sensor.
9. Faulty ignition switch.
10. Faulty run/off switch
11. Tilt sensor needs a reset.
12. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
01 ttr225 no spark
Yamaha TTR 225 Bad Spark Repair
http://tjsconcepts.com/ttr225/TTR225_Service_Manual.pdf
https://www.partsfish.com/page/oem-parts-for-yamaha
Yamaha TTR225S Owner Manual

2004 Yamaha TT-R... | 158 views | 0 helpful votes


Try using higher octane fuel,93 or 95

2006 Daelim... | 297 views | 0 helpful votes


could be a Vacuum hose or could be dirty carb jets.

2002 Suzuki VS... | 132 views | 0 helpful votes


Hi, Rcorbin35 and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, stator, magneto, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Air/fuel mixture screw improperly adjusted.
11. Accelerator pump damaged or not working.
12. Water or dirt in the fuel system, carburetor or filter.
13. Restricted, blocked or kinked fuel line.
14. Fuel tank empty.
15. The gas cap is not venting properly or fuel tank venting system blocked.
16. A failed fuel pump, pressure regulator and or fuel injectors.
17. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
18. Needle and seat stuck closed in the float bowl.
19. Petcock clogged or damaged.
20. Lean angle switch is faulty or needs adjustment.
21. Catastrophic engine failure, perform a compression test.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
2001 Honda VT1100 Shadow fuel filter location Google Search Easy way to change 1100 Fuel Filter
Honda SHADOW VT1100 Owners Workshop Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda Shadow VT1100 Owner Manual

2001 Honda VT... | 157 views | 0 helpful votes


Hi, Neels for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
How to fix that scary noise on your CBR or TDM bullet bike
Sneaky motorcycle cam chain replacement technic how to Davidsfarmison...
Yamaha TDM850 1996 Service Manual
https://www.partsfish.com/page/oem-parts-for-yamaha
YAMAHA TDM850 Owner Manual

2000 Yamaha TDM... | 158 views | 1 helpful votes


the valve clearance is incorrect at .15mm ( .005") it should be at .010"inlet and .012" exhaust and is set on tdc but on compression stroke tdc
decompression cams have a special grind that holds the valve open for starting revolutions and as the engine rpm picks up the cam follower doesn't follow the profile any more and closes the valve
engines that utilize such a cam are motors that have a rating exceeding 3 hp on a rope pull otherwise , the piston cannot be pulled over compression past enough to get it started
5 hp lawn mowers , 10-20hp rope pull generators etc have this cam

2003 KTM 625 SXC | 78 views | 0 helpful votes

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