Kawasaki Prairie 300 Jet Size After Boring - Kawasaki Motorcycle Forums
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post #1 of 2 (permalink) Old 04-30-2019, 02:34 PM Thread Starter
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Kawasaki Prairie 300 Jet Size After Boring

Hello, I recently got a 1999 Kawasaki Prairie 300 4x4 to sweetin the pot on a boat motor sale. It starts right up and runs but it smokes like a dag gum train. I have a Wiseco top end kit, PK1053, on the way and reputable machine shop lined up to bore the cylinder for the 77.50mm piston. I am currently working on cleaning up the head, lapping the valve seats, etc. From what I can tell the atv is all stock. I plan on doing some kind of air intake mod and slip on exhaust. I need help selecting the carb jet size after all the mentioned work has been performed. Also, thoughts on switching to a Mikuni carb and bigger jets?
schunter1969 is offline  
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post #2 of 2 (permalink) Old 05-27-2019, 01:14 PM
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In my experience, the exhaust and air filter make zero difference in power. Just makes it noisier. If the stock stuff is still in good condition, re-use it. Saves a ton of trouble with jetting, etc.

To my knowledge there is no jetting chart available for a prairie 300, thus you're on your own. The total of one people go through the trouble putting exhaust and intake on a prairie and I think I had that "one". Don't remember where the jetting ended up, but it had to go smaller on the main and slightly smaller on the pilot and a different needle; and even then it was still a little rich (owner was going to use it in the hills).
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