Question about 1993 Honda CB 250 Nighthawk

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Bike is reving but losing power - 1993 Honda CB 250 Nighthawk

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The loss of power is usually due to the need for a valve job. Do a compression check. If compression is lower than 120 psi a valve job is called for. While you have the head off, install new rings. Considering the age of the bike, a new cam chain would not be a bad idea as well. Another possibility is a lean fuel/air mixture; If the bike has an idle speed that you can not get to slow down then there is an air leak letting un-carbureted air into the mix. Cracked rubber seals or bad gasket on the intake manifold would be the likely source. bike is reving but losing power - tombones49_50.gif

Posted on Apr 03, 2011


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