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Dirt Bike Brands - Other
87 RM 250 Jetting Help
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[QUOTE="MikeyG, post: 603139, member: 37129"] Ok, my and a bud of mine are messing with the jetting of his 88 RM250. We did a plug chop, got a slightly tan electrode with about a 2mm black ring at the bottom. Main seems pretty good. The lowered the clip one notch, and it cleared up the midrange pretty well. The only problem we had was with the pilot circuit. Once the airscrew was out about 3 turns, the bike revved really high. I assume the AS was off by a lot. So I know the bike needs a leaner pilot, but can I just leave the AS where it is and skip the pilot until I can get one? I sprayed starting fluid onto the AS too see if it was leaking and that was why the idle raised so quickly, but it wasnt leaking. The result of the jetting was great. Its got to be one of the best mods you can do. Bike now starts one kick, has instantaneous response off idle, and pulls smoothly instead of sputtering a bit like before. This bike used to foul plugs every other ride, so we are hoping this cures the problem. Is it ok to leave the AS at 3 turns out until I get a leaner pilot? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
87 RM 250 Jetting Help
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