Question about 2005 Honda CRF 450 R

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Bike keeps back fireing when first starting

I just got a crf 450r and every time i go to start the bike it always back fires for ages then it mite go or not is it stale gas or is av gas the bike shop ffilled it up when i got it what would be a good gas to run plz

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  • b_cfalcon Dec 25, 2008

    Awesome, cheers for that!!! It is very much appreciated. And thanks for getting back to me so quickly

  • Anonymous Mar 28, 2014

    back fires ran bike without led substude forgot to put in the gas did i burn my vales



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Hi and welcome to FixYa,

Initially, backfiring is a spark/timing issue or contaminated fuel (water) or as you stated stale fuel. AVGas would not result to backfiring but rather a stronger pull though would heat up easily.

Good luck and Thank you for using FixYa. Happy Holidays.

Pls be informed that due to my current rank and rating, even a Helpful would be detrimental to my status. Should this solution not address your concern, it would be appreciated if you could just not rate it at all. Cheers.

Posted on Dec 25, 2008


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It back fires when i let off the gas and will run for about ten mins then just quite and it will start i thought it mite be that i have bad gas or the spark plug faled or my valves need adjusted do you now...

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Dec 25, 2008 | 2005 Honda CRF 450 R

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