Pro Circuit exhaust and Dynojet jetkit on the Dyno Testing with and without the spark arrestor Testing without the airbox snorkel and lid off Dyno reviews at the end of the video
Interesting. I have 2021 klx140l. I’ve drilled a bunch of small holes in the air box, put a big gun exhaust. Which is way to loud and sounds awful, I have a 100 main and 42 pilot and have changed the air mixture up. It runs way better than stock. But I cannot stand the exhaust note. It’s sounds awful, loud and cheap
joel if you guys dont like the noise on your big gun system sway you a oem 20 and some cash so you can try a different one . hope the had is starting out good
So it looks like updating the air box so it breathes better give almost as much boost in performance as the pipe during mid range where these bikes are ridden most. Thus adding a jet kit and opening up the air box would be a low cost boost in performance over a $400 pipe. Have you looked at trying a larger carb? Thanks for putting this data out.
amazing info you are putting out, very thankful. We have the same bike, trying out the Sigma jet kit. Any updates on the best setup as far as jet size, air box lid, fuel mixture screw turns, needle clip... stuff like that? thanks
With lid removed I drilled out the main jet to a 106. Worked well but don't plan on running the bike that way. This bike seems to need a bigger pilot jet and have one on order. Not enough adjustment on the air screw.
Did you dyno with the stock knobby on? This can give massive difference, sometimes up to %50 less, this bike is probably closer to 15hp. Also would like to know what torque numbers you got?
@@jadynschaller8571 ok thanks bc i have a ssr pit bike rn bc i am a beginner and i want a kx once i learn how to ride and i figured a 140 would be a good upgrade
Rocky Mountain atv they got every dirtbike part you can think of. But a frame would be a steep 4-8 months shipping. With machining it. Then shipping it.
@@dustywheelz7854 by far the best mod I did on my kids klx140 was the forks. Completely changed the feel of the bike. No more wallowing feel and is much more precise, not to mention the actual suspension travel gains.
@@dustywheelz7854 I just looked up the Honda crf 150 it claims 22.5 which to me matches the cc better than the klx 140 the kaw to me is grossly under powered even for just trail riding
@@Coyotethumper5 Definitely depends on what you are looking for. This is my daughters first bike and it is great for her. It is geared like a tractor so easy to start off on and climbs anything. I can jump on it and have a blast also but I am definitely stretching the throttle cable! I plan on doing the big bore kit and head shortly.
