Dyno Testing Jd Jetting Jd jetting, world class motorcycle and off road custom carburetor tuning, jet kits, carburetor kits, carburetor needles, jet screws, ktm, honda, suzuki, yamaha, husqvarna, husaberg, polaris, sherco. I have a 07 ltz 400 with a motorworks sr4 slip on, drop in k&n, and a rev box and the jd jet kit. i live in socal and ride from 0 3500feet. i have a 175 main and fuel mixture to 1.5 turns out, and a #25 pilot jet red needle on the 4th clip.
Jdjetting Dyno Jd Jetting Hey guys so even though we already have a massive jetting database (13 pages) on this site, we still get the "what jets do i need" questions all the time. the database is nice, but it is kind of hard to go through page by page to try to find a setup similar to your own. To access the carburetor, take the seat and fuel tank off. be sure to turn the fuel petcock off before taking the tank off. take the carburetor off of the motor and pull it up into the open. through the top of the carburetor install the dynojet needle jet just as the dynojet instruction describes. Trying to figure out jetting without an air box lid and with a modified exhaust is going to be a huge challenge. if you were just dealing with a modified exhaust, it would be easy. The james dean custom jetting kit is designed to improve throttle response throughout the range by using specially made multi taper needles. these are based on the most popular settings used by new generation mx and off road riders around the globe and the results are impressive.
Jdjetting Dyno Testing The Ttr125 Jd Jetting Trying to figure out jetting without an air box lid and with a modified exhaust is going to be a huge challenge. if you were just dealing with a modified exhaust, it would be easy. The james dean custom jetting kit is designed to improve throttle response throughout the range by using specially made multi taper needles. these are based on the most popular settings used by new generation mx and off road riders around the globe and the results are impressive. Jd jetting, world class motorcycle and off road custom carburetor tuning, jet kits, carburetor kits, carburetor needles, jet screws, ktm, honda, suzuki, yamaha, husqvarna, husaberg, polaris, sherco. After running his baseline dyno tests, the doctor explains them to the rider and discusses the potential improvements in power, economy, smoothness and longevity. © copyright 2026 jd jetting all rights reserved. I have an 03 ltz 400 full dmc alien system,pro flow kit,rev box, dynojet kit clip#3, lid off ,sea level, and have the 155 in now. i just installed a hotcam stage 1 intake cam and new chain. well since this new "improvment" it has a severe pop at just past 1 2 throttle. every gear, but only after.
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