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bbr 88cc jetting?

This is a discussion on bbr 88cc jetting? within the CRF50 forums, part of the General Talk category; i got a crf 50 with the bbr 88cc big bore with the stock head i just installed, it has back fire so i changed ...

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  1. #1
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    bbr 88cc jetting?

    i got a crf 50 with the bbr 88cc big bore with the stock head i just installed, it has back fire so i changed to a 60 main jet and i still have back fire just not as bad its free of air leaks i have the valves set for .003 if they were adjusted to tight could that make it back fire or should i go up a jet or bring my throttle clip up on the spring??????


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    Re: bbr 88cc jetting?

    stock carb? what is your location/altitude

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    Re: bbr 88cc jetting?

    ya i got the stock carb i live in wisconsin and 600-700' above sea level

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    Re: bbr 88cc jetting?

    im having the same problem! i have the same kit too. at first when the bike is cool it does it almost sounds like i need a valve adjustment but its a back fire. i found out it was a intake leak because a tiny pin hole is leaking air into the intakemanifold making a back fire. go over all your intake blots

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    ski
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    Re: bbr 88cc jetting?

    Buy a used klx 110 carb and you will be set run it with the stock jets that come with it used cost 40-50 bucks.

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