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Kawasaki KZ 750 LTD; Engine racing
Topic Started: Nov 4 2017, 01:00 PM (638 Views)
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Hi all. I have a 1983 Kawasaki KZ 750 ( us import ) that I have been renovating for a couple of years now, on and off. The bike is almost ready to MOT and register with the DVLA. The bike is a little hard to start, but eventually starts with a little squirt of Easy Start into the air box. After ticking over for a while the engine suddenly races up to 4000 RPM and stays there until I kill the motor. The carbs have been stripped and each part ultrasonically cleaned several times. New gaskets and a carb refurb kit has been fitted to each Keihin CV34 carbs. All the air box to carb rubbers are new, supple without any cracks. As it is a US model, it is fitted with the Air suction system from the air box to the top of the OCH covers to reed valves. The tickover is fully backed off so the increase in rev's are not attributed to this. There is fresh fuel in the tank. The throttle cable has free movement in the sleeve. I am at a loss what to do next to cure he high rev's after the engine warms up. Any advice or ideas would be appreciated.
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I would check the carb adjustment, hanging revs is usually lean/rich mixture.
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