Clinician
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Post by spiritwild on Apr 14, 2011 6:28:16 GMT -6
50cc gy6 Chinese scooter.
It starts ticking fairly loud but only after it warms up.
I've adjusted the valves but this didnt seem to be the issue unless scooter valves become noisier as the engine heats up.
Just seems odd that it only does it after its warm.
I'm learning as I go so any ideas will be helpful, especially in the transmission area. I've yet to mess with this area.
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Post by Bashan on Apr 14, 2011 6:55:43 GMT -6
Check your spark plug and make sure it's tight, a loose plug will "tick". Don't overtighten, aluminum strips. Valves should get quieter as the stems expand to fit the gap. What's your valve settings? Rich
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Clinician
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Post by spiritwild on Apr 14, 2011 11:03:31 GMT -6
thats what i was thinking. "heat expansion".
It only does it if i run it hard (full throttle) on longer rides. i never run full throttle for long, just on certain rds.
I cant see where it could be heat related, because my commute to work is 3 miles with some full throttle and it doesnt do
it at all.
I will check the plug though, never thought of that.
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Clinician
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Post by spiritwild on Apr 15, 2011 5:28:04 GMT -6
Well, I adjusted the valves again. I'm hoping that may have fixed the situation.
Won't be able to ride for a bit because of rain.
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Scooter Doc
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Post by sprocket on Apr 15, 2011 15:33:16 GMT -6
How did you adjust the valves? Trying to hit top deal center? (TDC)
Try it this way...
1. Remove or loosen the plug so it leaks compression. Remove the valve cover
2. Turn the fan clockwise until the exhaust valve (bottom) is fully depressed.
3. Adjust the intake (top) valve to .004 "
4. Rotate the engine again, until the intake valve is fully depressed
4. Adjust the exhaust valve to .005"
Put the valve cover on and screw in the plug and you are good to go...
This is by far the most accurate way to set the valves and it takes into consideration
any valve wear, cam wear, cam chain stretch, miss aligned cam sprocket etc...
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Clinician
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Post by spiritwild on Apr 16, 2011 10:14:36 GMT -6
Yes, TDC.
I'm at 003 and 004 now. waiting to ride it and see how it does. i was previously 004 005
I like that idea of setting gap. i may redo it that way. thanks
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Scooter Doc
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Post by sprocket on Apr 16, 2011 11:38:21 GMT -6
Sure.. .003 and .004 are good on a 50 cc
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