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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
High Altitude Jetting Help Please!!!!
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[QUOTE="DH2MX, post: 1436968, member: 125247"] I'm new to the site and the sport so any advice will be greatly appreciated. I bought a 99' yz 125 at a yard sale for a few hundred bucks, and my buddy who talked me into it was kind enough to rebuild the motor (new bearings, crank, basically everything). A brand new procircuit spark arrestor for a yz250 came with it which he modified to fit my bike. Other than the pipe, all is stock as far as [I]I know[/I]. Yes, total low budget project but its my first bike, was only ridden 1 season, and basically brand new. First time out I got exactly 3 miles until melting a hole in the piston (already replaced) and I don't want it to happen again. I was told its way to lean and needs to be rejetted. Here's the kicker, I live at 8,650 ft and the trails i want to ride ascend and descend between 8,500 and 12,000ft. The shops I've asked are pretty tight lipped without handing over a bunch of greenbacks and having them do it for our base elevation. Any advice (other than getting a bigger bike or 4stroke) on what jets to install for high altitude would be great. I have to figure this out myself or I'll spend more getting it jetted every week than I have in the bike total. Thanks for any help!!!!! [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
High Altitude Jetting Help Please!!!!
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