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Post by smooch on Oct 10, 2019 10:51:27 GMT -5
I have a 50cc Taotao 1p39qmb. I put a BBK 50mm piston big valve heads a KeiHin 20mm carb or CVK. I put 6g rollers in the cvt. No rev cdi and 49/17 final. It was doing about 50mph now I barely get 40mph. It starts very hard so I adjusted the valves. Still starting hard. Do you think my timing chain jumped a tooth? Also has a idleing problem when started. I don't know if that has any thing to do with the fuel enricher. I believe I have the fuel to air mixture correct?
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Post by scooterted on Oct 10, 2019 13:08:52 GMT -5
This isnt really the correct section for troubleshooting. The 4 stroke troubleshooting section would probably be more helpful.
Its probably one problem causing all those things. Im thinking a compression loss. But it could be several things.
If it were me, I would:
Inspect/change the spark plug.
Clean the air filter.
Do a compression test.
Check camshaft alignment.
Inspect cvt while i was at it.
Clean carb while I was at it.
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Oct 10, 2019 13:31:27 GMT -5
If you can post a video of it idleing and you revving it that my help hearing what the problem is.
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