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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Optimal jetting for maximized performance
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[QUOTE="mhopton, post: 382700, member: 29022"] Eric, I've spent some time learning and trying to understand JD's approach to jetting based on throttle position as it relates to temp, alt, needle dia. & taper, and clip position. I've also followed some of his links, one of which led me to your site with some good instruction on tuning based on feel. I have various needles, jets, and pilot jets and now intend to go out and spend a few hours attempting to dial in the bike based on yours and Canadian Dave's carb. tuning instructions. My question is, I'd like to incorporate JD's jetting guide info into selecting my MJ/PJ/Needle/clip position as a starting point, but am having a difficult time interpreting the graphs created by input of the previously mentioned variables. Can you put into layman's terms the easiest way to interpret what the graphs are telling me as it relates to engine performance ultimately leading to jetting changes? If you're not familiar with JD's jetting database, follow this link. [url]http://home.att.net/~wbarrow/jd/jd_index.html[/url] Bike is a 2002 DRZ400e. Current setup is 165MJ, 48PJ, 1-7/8 out on FS, OBDXPneedle in 5th slot, airbox open, stock exhaust opened up. Thanks, Mike [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Optimal jetting for maximized performance
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