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Post by tortoise on Feb 2, 2017 12:41:07 GMT -5
Was an aftermarket fuel injection system installed? Original 150cc GY6 fuel injected models are somewhat rare . . example. |
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Post by tortoise on Feb 1, 2017 22:53:19 GMT -5
Year, brand, model?
Sometimes the large clutch nut will loosen and contact the inner bell surface.
A clutch bearing may be deficient resulting in excessive drag.
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Post by tortoise on Jan 31, 2017 14:11:51 GMT -5
It's getting more convoluted each year. Have to wonder if this format change may have contributed to Carl Edwards exit?
A somewhat related comparison may be the NHRA drag racing 4-wide-format.
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Post by tortoise on Jan 29, 2017 23:43:59 GMT -5
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Post by tortoise on Jan 26, 2017 13:59:34 GMT -5
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Post by tortoise on Jan 25, 2017 22:19:17 GMT -5
Verify flywheel F-mark alignment positions the reluctor under the trigger coil.  |
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Post by tortoise on Jan 25, 2017 19:53:18 GMT -5
Any chance a Kymco flywheel was installed on a non-Kymco 139QMB engine?
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Post by tortoise on Jan 25, 2017 17:25:16 GMT -5
Verify flywheel/crankshaft woodruff key has not sheared . . which alters trigger-coil timing. Insert a probe into the sparkplug hole and turn flywheel to position piston at top-dead-center . . then observe if flywheel T-mark is aligned with case indicator.
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Post by tortoise on Jan 23, 2017 14:23:50 GMT -5
Too lazy to look . . and punctuate text?
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Post by tortoise on Jan 19, 2017 16:24:16 GMT -5
Yiben? Video shows rider putting feet down when stopped. Is that typically required at stop lights/signs on this model?
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Post by tortoise on Jan 19, 2017 14:35:12 GMT -5
have spark and gas going to the carb . . adjusted the valves to .004(intake) and .005( exhaust). Have you tried spraying starter fluid into the intake?
Have you tested cylinder compression with a meter and 10mm sparkplug hole adapter?
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Post by tortoise on Jan 18, 2017 18:46:46 GMT -5
. . . with a vacuum operated pulse-pump.
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Post by tortoise on Jan 18, 2017 14:11:42 GMT -5
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Post by tortoise on Jan 18, 2017 13:37:34 GMT -5
high performance.kit from j.andj J&J link
What are your speed expectations? Performance ignition components are typically a waste of money.
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Post by tortoise on Jan 11, 2017 22:30:42 GMT -5
wonder if I can drill out the plug and get access to adjust fuel/air mixture |
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