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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
No power until on the pipe
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[QUOTE="Mac, post: 174260, member: 18503"] Mike I'm not sure what mods have been done to your carb but if it were mine I wouldn't assume anything. If your bike runs better with the needle richer then your "good to go" too rich will hurt performance, possibly foul plugs and cause the power valves to gum faster but will not hurt the engine. When jetting, jet the main at WOT for good plug color because a lean main will melt aluminum, then jet the rest of the carb (needle,clip,pilot,a/fscrew) for best performance. REV There are several different circuits in your carb that affect the A/F mixture at different throttle positions. Think about it..it is possible to have a carb that is too lean and too rich at the same time. Just try running a 60 pilot and a 145 main and you'll see what I mean. Your problem was what I expierenced when switching to the REV pipe. The pilot was too rich and the needle was too lean. Once I figured that out and got my throttle response snappy again like it used to be with my stock pipe I switched to a 152 main which let the bike rev alot higher. Please don't just assume that plugging in my jetting numbers will work for you. Jetting can vary from bike to bike due to oil/fuel ratio, temp, altitude, type of fuel, bike mods(reeds,pipe,airbox,etc..), how the air filter is oiled, air leaks, etc..you get my point. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
No power until on the pipe
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