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Honda ATV Forum

Posts about Honda atv models and manufacturer specific topics.

744 topics in this forum

  1. Honda ATV Service Manuals 1 2 3 4

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  2. Honda ATV VIN Number Decoder & Search

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  3. 1985-86 Honda ATC 350X Service Manual

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  4. 1988 Honda TRX 300 wiring diagram

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  5. 1986 Honda 250

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  6. headlights

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  7. 2007 Honda 400ex Need Motor in Alaska

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  8. 1991 Honda Fourtrax 300 won't start

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  9. New Honda 520 Rubicon

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  10. 2007 Honda 420 Overheating & stalling

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  11. Honda 400ex WONT START HELP

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  12. VIN search 2002 Honda Rubicon TRX500FA

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just get it


  • Latest Forum Posts

    • Nice work and great job explaining the test results.  Keep us posted! 
    • Ok lets go through some steps and do a process of elimination thing.    If your concerned or think its the carburetor then go through the manual, check the spec on the jets and the sizes and make sure everything is proper according to the specifications including the float height. Check the choke and make sure its not getting hung up or pulled in while the throttle is reving ? This way you will rule out the carburetor.   Next would be fuel flow from the tank. Could be restricted or have some sort of vapor lock from the gas cap? Leave the cap off and see if it still gives you a problem   After that i would look at the intake boot that connects the carburetor to engine and check for any cracks that may be sucking in air from time to time.    A simple trick to test this is spray some carburetor cleaner around the carburetor while the engine is running  and listen for any changes in the way the engine runs, lightly wiggle the carburetor as well to expose any cracks on the boot     So after all this is done you will have ruled out any carburetor and fuel delivery issues.   If that has not fixed the problem  i would buy an in line spark tester and attach it to the spark plug and spark plug wire and see if the spark breaks down under a throttle load.  Its about $10 bucks on Amazon.    Get a tester and start to check the specs  on all of the electrical equipment, regulator, stator etc.  Even if you replaced them or tested to it again.   Rule out all items electrically and write down  everything.     While the engine is running start wiggling the wire harness around and again listen for changes.  After that the only thing it could be is tye cdi$$$$$$$$$ And that sucks!!!    
    • The type of day doesn't seem to matter. That is what is weird. I even took it to a shop and they found a cracked intake, which they replaced, and I thought things were good. But a little bit later, it did the same thing. The funny thing is, I KNOW it is something stupid simple that is causing the problem I just can't seem to find it. 
    • If it is jet size it will run good on warm humid days and bad on cold days.
    • Thats the weird part. Sometimes the quad runs great and other times it acts up. Could I have something in the tank restricting flow. I will give throttle and it barely has any power. 

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