Hi there,
I've got a 1990 Kawasaki ZXR250, 4-cylinder, 4-stroke and it's got a problem.
The bike starts quickly and happily when it's cold. I put the choke on for a little while and after a minute i turn it off. I then jump on the bike and head out for a ride. After a while (at least 20 minutes) the bike will sometimes stall when I stop giving it gas ie. come to an intersection or set of lights. When it stalls the revs slowly decrease from around 1500rpm to zero, I can see it happening and have become adept at keeping up the revs as I slow down.
After it stalls it becomes very difficult to start again. The battery is new and it tries pretty hard to start again but i usually have to wait up to a minute for it to catch.
I also have a problem with throttle hesitation. When I open the throttle up quickly (not just close then full open, also from say 30% throttle) it bogs down until it gets to around 10K revs and then pulls alright until red-line of 19K. I don't usually give it that many revs so that is just FYI.
I've seen there are people posting similar threads at the moment but this situation is a little different. I'm not sure if the differences are important or not. I'm not a mechanic so pretty unsure.
The weird thing is that it starts fine when cold and idles happily. When I get home after a decent ride (where I've had it stall) it'll happily sit in my garage idling as if nothing happened.
Can anyone help?
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