Question about 2002 Yamaha V-Max

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2002 yamaha 1200 vmax 4 bbl carb fouling plugs

2002 yamaha 1200 vmax 4 bbl carb carbon fouling plugs after 50kms, new low comp pistions installed never done it before any ideas what it could be ?

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  • Yamaha Master
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Hi, Jamie12r and the usual suspects are:
1. Dirty air filter.
2. Fuel mixture too rich or enrichner/choke left out too long.
3. Faulty spark plug.
4. Incorrect spark plug heat range for the engine type or service.
5. Piston rings badly worn or broken.
6. Valve guides are badly worn and/or seals worn, crushed or have come off the valve guide and are pumping oil through it.
7. Spark plug cable weak or leaking check for spark jump in the dark.
8. Faulty ignition coil.
9. Low RPM nonaggressive riding style.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Vmax fouling sparks plugs
Thread What Will XLT1200 Behave Like Fouled Spark Plugs
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
Yamaha VMAX VMX12W1 Owner Manual

Posted on Jun 08, 2017

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

finish line
  • 207 Answers

SOURCE: Rear Cylinder

they may to be adjusted

Posted on Jun 23, 2009

  • 1 Answer

SOURCE: 2002 YAMAHA BANSHEE WILL NOT REV

I have a 2004 banshee at the yamaha dealer being worked on.It would not run when i took it up there they cleaned the carbs and put it back together it will start but when you rev it, it holds itself wide open and wont shut down unless you pull the plug wires.they also checked the floats in the carbs said they where ok. they think it is a vent issue with the gas tank or the fuel shut off valve.IS THAT POSSIBLE

Posted on Aug 27, 2009

  • 278 Answers

SOURCE: 94 yamaha vmax 600. How do you tighten the track??

you mean v max 1200? Losen rear wheel, align with a straight bar. Make sure the drive shaft spin freely

Posted on Oct 13, 2009

wayneman01
  • 301 Answers

SOURCE: my yamaha yz 125 is dumping to much fuel and

There are only two adjustments to make on your carburetor; the idle speed, and the idle mixture adjustment. If the spark plug fouls frequently, first make sure you are using the correct spark plug. Your 1997 YZ125 uses an NGKB9EGV. Then be sure you are using the recommended two stroke oil, mixed to the proper ratio, in the fuel. Also make sure the air filter is not excessively soiled.
With all of the above confirmed and corrected, start the bike and run until the engine is up to normal temperature. Adjust the idle mixture screw to attain the fastest idle and best throttle response. Then adjust the idle speed.
If you are still fouling the spark plug, verify that the carburetor has the correct size jets by consulting your owner's manual. Keep in mind that if you are operating your bike at an altitude higher than about 6,000 feet above sea level, the stock jetting may be too rich. Down-size the main jet in small increments until satisfactory operation and the correct spark plug color is obtained.

Posted on Nov 02, 2009

  • 491 Answers

SOURCE: I have a yamaha trimoto 175 3 wheeler, The carb. Flooding!!

CHECK THAT THE NEEDEL IS NOT BENT AS IT HAS TO BE DEAD STRAIGHT .

Posted on Nov 08, 2009

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1989 vmax 1200 back firing at low idle


Hi, Michael and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. 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.
3. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage check for spark leakage in the dark.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
poor running vmax
http://www.vmaxoutlaw.com/tech/VMX12-Service-Manual.pdf
OEM parts for Yamaha
http://www.vmaxoutlaw.com/tech/owners_manual.pdf

Oct 15, 2016 | Motorcycles

1 Answer

My 1990 VMax 1200 is overheating even with the fan on


Hi, Anonymous and the usual suspects are:
1. Engine oil level and SAE weight are too low or not circulating.
2. Insufficient or blocked air flow over the engine.
3. Heavy combustion chamber carbon deposits.
4. Ignition timing retarded due to faulty MAP, CKP, or CMP sensor.
5. Carburetor jetted too lean.
6. Leaking intake or exhaust valve.
7. Water coolant old or low change every two years.
8. Water pump failure.
9. Radiator clogged, cap loose or malfunctioning.
10. Radiator fans not coming on.
11. Clutch slipping, brakes dragging, heavy load, towing a trailer etc.
12. Idling too long without moving.
13. For constant hot weather temperatures, mountain, or desert riding conditions consider adding an oil cooler and or cylinder head cooler.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
overheating VMaxForum net
http://www.starvmax.com/kunena/12-general-vmax-discussion/31217-vmax-overheating
http://www.vmaxoutlaw.com/tech/VMX12-Service-Manual.pdf
OEM parts for Yamaha
http://www.vmaxoutlaw.com/tech/owners_manual.pdf

Oct 25, 2013 | 2000 Yamaha V-Max

1 Answer

85 yamaha maxim xj700 carbon fouls pluges 1and 4 in 10 min.


if there oil fouled then rings or valve guides are bad from age--if gas fouled then the carbs need ajust or spark is bad--getta clymer manual

Dec 13, 2011 | 1982 Yamaha XJ 650

1 Answer

Its a 1997 Vmax and just before the V boost starts or call it the pre boost the bike sputters or almost like a bad cylinder.But everything as far as most normal checks things seem fine. Compression on all...


Hi, Stevecruzin personally I believe you have an issue with the V-Boost black box or the servo motor otherwise the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. 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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor damaged, contaminated, sticky float, plugged jets.
13. Multiple carburetors out of sync.
14. Fuel filter clogged.
15. Old or contaminated fuel.
16. Fuel tank vent system plugged or carb vent line closed off.
17. Gas cap diaphragm valve faulty.
18. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
19. Carburetor controls misadjusted.
20. Incorrect valve timing.
21. Valve springs floating, weak, or broken.
22. Damaged intake or exhaust valve.
23. Incompatible performance parts.
24. Control module may be in "LIMP" mode
25. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
New VMAX owner possible carb or maybe VBOOST problem
SASY Boost Controller Installed on Vmax
Yamaha VMX12H Supplementary Service Manual
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Apr 17, 2017 | 2000 Yamaha V-Max

1 Answer

91 vmax fuel pump relay factory upgraded to a 4 prong that replaces the original 6 prong how do you hook it up


Hi, Johnpandure 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 please click on the blue links below. Good luck and have a wonderful day.
91 vmax fuel pump relay factory upgrade Google Search
Motorcycle Electrical Ignition Relays for Yamaha Vmax 1200 eBay
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
Yamaha VMAX VMX12R Owner Manual

Jul 10, 2011 | 2000 Yamaha V-Max

2 Answers

Hi 2000 yamaha Vmax, 4600 miles on the clock.


This sounds like a carburetor problem. Either bad gas, partially plugged pilot jets, carb diaphragm cracked or has a pin hole, carbs out of sync or diaphragm cap is not tight. It would be best to have a dealer check it out. However, before going to the dealer I would try one thing. Drain the float bowls on all four carbs. There is a drain plug on the bottom of each bowl. Condensation inside the gas tank can make it's way into the carb. Bikes don't run well with water in the gas. Please rate my solution. Thanks.

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Aug 12, 2010 | 2000 Yamaha V-Max

1 Answer

I have the homelite Vac Attack 2, i'm having trouble starting it, i prime it the desired 7 times (actually more) but i just sit there and pull, and pull, and pull the cord....really getting frustrated!


#1 senerio
Fouled spark plug
ie, carbon and or fuel fouled
install new plug, and withouth choking or priming, pull 4-6 times while holding the throttle at wide open.

If not fouled, go to senerio #2

#2 senerio
Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

Nov 09, 2009 | Homelite Leaf Vac Attack

4 Answers

I have a 2002 Yamaha FX140 Waverunner.Fuel problem or electronic?


you have fouled spark plugs change them all fixed all the newq yamaha sare doing it it is the in thing to do

Jun 12, 2009 | Yamaha 12V Air Pump

2 Answers

My FZR600 won't start. No mods, all stock. I got it a month ago and it had been stored over the winter with no stabilizer. It wouldn't run, so I cleaned out the tank, made sure the fuel lines were clear,...


These things are really temperamental.The plugs are fouled again..I had the same bike and went through the same thing..It doesnt take much to foul them..Get some new plugs and she'll run like a beaut..Just remember not to choke it to much..Thats where the plug fouling happens the most..Always keep a spare with you and you'l always be on the good..It will work!!Have a great night!!!!!!!!

Apr 03, 2009 | 1989 Yamaha FZR 600

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