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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
hard starting o1 xr400
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[QUOTE="lipskid, post: 168744, member: 21801"] My new xr4 was also hard to start when cold. After unplugging the air box, fitting a PC T-4 pipe and grinding out the welds in the head pipe, I jetted the bike according to" SRC Jetting Recommendations" that I got from my dealer. 98-00 XR 400 STD low med open 52pilot 55 58 62 142 152 155 162 needle 2nd from 2nd 2nd 3rd top 'low' is is stock exhaust or after market with low volume baffle(quiet) 'med' is stock exhaust that has been slightly modified(different tip) or after market with a medium volume baffle or average amount of discs installed 'open' stock exhaust with no baffle, after market with maximum amount of discs or open volume baffle(loud) I used these as a starting point, then corrected for elevation according to the charts in the service manual. The bike now starts in 2-4 kicks cold, and usually 1 when hot. Cold- full choke, no throttle(if not in 3 kicks, I go to half choke and it fires right up). I never touch the throttle when starting it now, but stock it did seem to like it cracked open a little. Also, I always start to kick with the piston at TDC. XR4's have an automatic decompressor geared into the kick starter, so there is no need to use the decompression lever. Just push down untill it gets hard, return to the top, and kick all the way through. :) [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
hard starting o1 xr400
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