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Post by yellowhorse6 on Aug 13, 2012 18:25:03 GMT -5
Hi guys! I'm a new member but not to scooting. I have been lurking as a guest for many weeks. I have a Tao Tao CY50-A that has 130mi on the odometer and has recently started experiencing a porpoising( jumping) idle, going up to almost 2800 and then back to idle @ 1200. The idle was set @ 3000 when I got her, not sure why it was so high. I initially thought the jumping idle might be a vacuum issue so I checked all lines and all are in good shape and attached. Sometimes it feels sluggish after it sits for a few days or so and a quick blip of the throttle sometimes will cause the bike to shut off as the revs come back down. Has anyone experienced this issue or something similar? If so, please shed some insight on me as to the problem and fix.
I also thoguht I'd mention that I trashed that chinese oil before the first ride and replaced with high quality stuff. Only feed it 93 octane. Any recommended fixes or upgrades would be awesome too. I'm thinking maybe a new carby, new rollers and rear disks? All help is greatly appreciated in advance!
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noday
Scoot Enthusiast
Posts: 149
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Post by noday on Aug 13, 2012 18:53:20 GMT -5
hmmmnn, the idle is very lean, a result of the sealed carb with small jets to meet epa standards + perhaps a vac leak
you need new jets and/or a new carb.
for a 50cc 4T, if you convert to a manual gas/fuel valve, you need no vac lines.
that makes life simpler.
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