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I have a 1986 Suzuki Intruder. I had the same problem. Usually, if the battery has a resource that charges the battery whie you start, (Jumping it) it will do fine ONLY because the batter that you jump the Kawasaki with, it is using the batter that you Jump it with to power it. I would recommend getting a new Battery for the Kawasaki.

AnswerBegin by checking for corrosion and loose connections at the battery, solenoid and starter. Take care when you jump start your bike. If you jump from a car, make sure the car is NOT running. The voltage regulator on the car will increase the output from the alternator to compensate for your weaker system and this can fry your bike's electrics...
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Q: What could cause a 1980 KZ750 Kawasaki to crank slow like the starter is dragging but if you jump it it turns over fine and starts?
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