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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
Jetting of a kx125.
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[QUOTE="syko, post: 765728, member: 50053"] I yet again need some help for jetting my kx125 2004 model. it's broken in and been stripped down and had all done that needs to be done after break in. the bike is running rich, as expected. so i've taken off the carb ready to lean it out a little. i took it too my local practice track the weekend, it's a very bumpy, jumpy track and there are few places to really let rip and open up the throttle, so i was mainly in 1st gear and in sections second gear but never above second at any point. when it was in 1st gear it was ridden right at the top of it's gear for the most part. i fouled 3 plugs that day so it is obviously rich. the weather at the moment is just warm. not hot at all but warm enough to get away with a t-shirt, although it has been pretty windy. no idea what altitude is here in the Uk. (sorry if my weather report is a bit vague) so anyways, i took off my carb ready to lean it out. the stock settings are: jet needle- 6CHJ10-82 jet needle clip position-3 pilot jet-40 main jet-420 air screw opening-2 and a half. i've been running a fully synthetic race oil at 32-1 and i've been running BR9EIX plug. what do you guys think I should be changing my set up too? in my spares kit i have pilot jets: 37.5/ 42.5 main jet: 410/430 jet needle: 6CHJ11-82 also, with the pilot jet and main jet what exactly equals 1 size up or down. e.g would one size up on a main jet that is 420 be a 421 or does it go up in 10's? and if my pilot jet is 40 is 1 size up a 41 or does that go up in .5's? hope that makes sense! thanks once again in advance. [/QUOTE]
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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
Jetting of a kx125.
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