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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
1991 KDX no idle
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[QUOTE="jhelm, post: 99171, member: 23548"] I have a 1991 KDX200 that has a new top end, pipe mod per Canadian Dave, boysen reeds, air box mods, FMF silencer/spark arrestor and it seems to want to run only at half to full throttle. I cannot get idle or the enriching circut to work. The air screw and idle screw have no effect on the motor and I am seeing bubbles in the coolant tank when I rev it. I have tried several jet/needle combos including 155 main, 48 pilot and the needle clip moved down 1 from center. In this setup it would run at 1/4 to full throttle although it seemed a little down on power overall. There don't seem to be any air leaks around the carb and the reeds are new. I have taken the pipe off and the power valve is in time and clean. I should mention here that the cylinder was sleeved and a stock piston fit by Wiseco last summer. I am starting to think that I have a cracked head or bad headgasket. Any ideas what else to look for as I tear this thing apart one moe time? [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
1991 KDX no idle
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