Question about 2003 Yamaha WR 450 F

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2001 yamaha Grizzy 600 not getting gas

While running it cuts out, backfires, checked carb it's working fine, spark plugs look good, fuel filter clean, no water in gas.

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Hi Daniel,
Check the ignition coils.

Knight. (yamaha seca XJ750A 1981)

Posted on Feb 12, 2009


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My 2001 yamaha 1600 roadstar backfires and cuts out just before I shift. It idle fines. it runs good between gears. It cuts out just when it get up in higher rpms, just before I shift.

Backfiring and cutting out liike this is probably a symptom of one or both of the following: too rich a fuel mixture, or too weak a spark. Take your spark plugs and see if they tips look tan or black. If black, your fuel mixture needs to be leaned out. Another possible cause is a dirty and or clooged air filter, which can reduce the air flow into the engine. Take it out, bang the dust and debris out. If it looks really dirty, replace it -- they're cheap. If your spark is too weak, you may also notice a loss of power, especially at higher revs. If none of these seem to be the culprit, have your ignition timing checked.

Apr 20, 2014 | 2003 Yamaha Road Star Warrior

1 Answer

Seems like carbs are flooding lots of gas and wont run right

Hi, Anonymous and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. 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.
7. Intermittent short circuit due to damaged wire insulation.
8. Intake air leak.
9. Water, dirt, or rust in the fuel system, fuel pump and/or filter.
10. Fuel tank vent system plugged.
11. Throttle body controls misadjusted.
12. Damaged throttle body or intake seals.
13. Loose, dirty, or corroded ignition module connector at crankcase.
14. Faulty MAP, CKP, O2, and/or CMP sensors.
15. Incorrect valve timing.
16. Weak or broken valve springs.
17. Damaged intake or exhaust valve.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day.
Hard start Backfires The FZR Forum
How to Clean Motorcycle Carburetor the RIGHT way Evan Fell Motorcycle Works
OEM parts for Yamaha

Apr 08, 2012 | 1989 Yamaha FZR 600

1 Answer

I bought a 97 fzr 600 with 1100 miles but it wont start. I have Spark Fuel and good compression. I replaced the Stator, Carbs are clean. Engine head is clean. It sounds like its going to start but just an...

i have the same bike and had same problem mine was fuel pump so with that said pull off the gas line and turn on key it should keep spraying out if only a little spirt comes out its bad make sure to also check filter i hope this helps you please give me good feed back thank you

May 23, 2011 | 1995 Yamaha FZR 600

2 Answers

1986 yamaha royale venture...XVZ13DSC running a little rough when idle. Runs fine after up to speed... Backfires on delceleration sometimes... replaced spark plugs, all looked good with consistant tan...

The first thing that I would check is the choke. Is it sticking?? the backfire on decel indicates that it is getting to much fuel.
A new fuel filter is a very good idea but I would look at the old one and see if it is contaminated.
My concern is the fuel tank. If the carbs were done properly they should be fine. If there is a problem it could be rust in the fuel tank that is still polluting the carbs. I have had many bikes that age that require the fuel tank to be removed, cleaned and possibly coated inside.

I would also drain all of the carbs. Each float bowl has a drain screw and can be loosened up slightly to remove the fuel in the carb. Make sure to take a close look at the fuel that comes out to check for water or contamination.

I hope that this helps,

Jan 18, 2011 | Yamaha Royal Star Venture Motorcycles

1 Answer

2001 yamaha breeze wont stay running

i had the same issue. it's gonna be a blockage in one of the vent tubes to the carb. check the line to the left of the carb that runs next to the gas tank. if thats fine then check the gas cap line. then if thats all good then check the line that runs below the carb. these are all vent tubes and allow the carb. to refill with fuel

May 19, 2010 | 2001 Yamaha DT 125 R

1 Answer

Crank no start yzf 600r

Inject some carb cleaner spray through the opened air filter while cranking.
Spark plugs work? timing on the camshafts ok?
Crank it without turning the throttle on.
Pull the choke cable if you need to.
It should fire up without throttle.
Use the carb cleaner spray to help it (don't spray too much.It will backfire from the carbs).

Jun 15, 2009 | 2005 Yamaha YZF 600 R thunder cat

1 Answer

My yamaha xj600n was running perfect but when i tryed to start it this morning it wont start it just backfires.??

there may be a problem with the spark plug. did you wash your bike?? open up and clean ur bike's plug. or else get your carb/fuel injection repaired. Hope it works..:))

Mar 10, 2009 | 1991 Yamaha XJ 600

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