250r jetting q's?
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Lowest needle position? Move it back to the middle. Do another plug check. If your plug is black you're too fat, plus it blubbers on top-end. Is the air screw adjusted right? Turn it in all the way and then back it out 1 7/8 turns. Did that help? Plug still black? Go down one main jet size (from a .155 to a .152). Do another plug check.
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I have been trying to get my R jetted for about 2 weeks now and I think that I am finally close. About your idle question, mine wouldnt idle at all either and all I did was adjust the throttle cable up on the handle bars. This sounds to simple to work but it really does. Try turning the adjuster out so that it puts more tension on the throttle and the engine will rev a bit faster thus it will idle.
Chris.....'87 trx 250r.....too many mods to list
Chris.....'87 trx 250r.....too many mods to list
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