CBR400 trouble

1044 Views 7 Replies 4 Participants Last post by cbr900racer77, Dec 14, 2009

BUNTRON

Discussion Starter · Dec 12, 2009

I'm having trouble with my CBR400. At low revs the big behaives fine, but as you open up the throttle more and more the big begin to 'bog' down and acceleration all but levels off. it feels as though the carbs are blocked.

Can anybody shine some light on what may be causing this?

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Twincam

· #2 · Dec 12, 2009

Has she stood for a long time? It could be a simple problem of the carbs being blocked as you said, could be fuel related (pump not being able to push enough) or could even be the electrical system breaking down under load (have had problems with my Consul)

Best thing to do is buy a Haynes Manual and strip the carbs. At least you know its one less thing on the list (and will help her run better)

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Twincam

· #4 · Dec 12, 2009

Hmmm. Does she bog down when you open the throttle quickly or will she build revs if you go slowly?

Starting a bike up without riding it over a period of time could do more damage than its worth.

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Twincam

· #7 · Dec 12, 2009

BUNTRON said:
she bogs down when you open the throttle quickly, but also bogs abit if you let the revs build up

Have you just bought her?

I'd give her a good service and clean the carbs.

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