It finally stopped raining long enough for a test start/ride of my newly carb-cleaned '89 NT650 (bone stock). Results were 100%: started instantly, idled, pulled hard at all throttle openings/loads. Small-throttle surging, deccel popping, and part-throttle bogging all completely eliminated. (Well, ALMOST: the bike still feels just barely surge-y/"lumpy" at tiny throttle openings/ low revs, such as long, mild downhills; any thoughts?)
Advice to past self: the new boots/insulators were a godsend; I can see where it could be a struggle else. DO replace the air-screw and valve rubber seals; I used the TYGA kit from Thailand (DHL cost 3x the parts...), which worked fine. If I had it to do again, I would spring for new jets, and float-needle and seat -- another $30 isn't going to kill me. Mine were all fine, though both slow jets screw slots were bunged up by some P.O., and the float needles both have barely visible wear but seat fine; I managed.
Bike idles a tad low, tho I didn't touch the idle-set AFAIK, and a touch lumpy, which is not surprising given airscrew removal and reset by counting turns. Next up will be a synch.
Thanks for listening, and earlier advice.
--Danny (NH)
Advice to past self: the new boots/insulators were a godsend; I can see where it could be a struggle else. DO replace the air-screw and valve rubber seals; I used the TYGA kit from Thailand (DHL cost 3x the parts...), which worked fine. If I had it to do again, I would spring for new jets, and float-needle and seat -- another $30 isn't going to kill me. Mine were all fine, though both slow jets screw slots were bunged up by some P.O., and the float needles both have barely visible wear but seat fine; I managed.
Bike idles a tad low, tho I didn't touch the idle-set AFAIK, and a touch lumpy, which is not surprising given airscrew removal and reset by counting turns. Next up will be a synch.
Thanks for listening, and earlier advice.
--Danny (NH)
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