Question about 1990 kawasaki ZZR 600

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Keihin CVK-D36 carbs on a 20 yr old ZZR 600 motorcycle. Bike starts fine on choke and idles ok when warm. The engine revs up fine on the choke. As soon as the throttle is twisted the engine stalls. The bike starts again instantly on a closed throttle. Where do I start?

Posted by Brian Burke on

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It sounds like your bike has been sitting in storage for an extended period of time (a year or more) - and the carburetors are plugged up. If this is the case, they will need to be completely disassembled and cleaned out.
If it hasn't been sitting (and the carbs aren't plugged up) then check that all of the normal tune-up items have been performed, especially valve adjustment, oil and filters, spark plugs, etc. If this fails to produce positive results, perform a compression check on the engine. Each cylinder must be able to produce at least 140 psi of compression in order to run and idle properly.

Posted on Nov 07, 2009

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1 Answer

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