50cc Chinese ATV issue with video
#11
03-09-2017, 06:29 PM
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10mm can translate into being off quite a bit.
Maybe pull the plug, insert a drinking straw into the cylinder, then manually turn the crank and bring it to TDC, feeling for the top with the straw. Then see if the mark you used is aligned.
Do you have the link to the timing so we can look at it?
Maybe pull the plug, insert a drinking straw into the cylinder, then manually turn the crank and bring it to TDC, feeling for the top with the straw. Then see if the mark you used is aligned.
Do you have the link to the timing so we can look at it?
Thanks rich
#12
03-10-2017, 09:22 AM
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10mm can translate into being off quite a bit.
Maybe pull the plug, insert a drinking straw into the cylinder, then manually turn the crank and bring it to TDC, feeling for the top with the straw. Then see if the mark you used is aligned.
Do you have the link to the timing so we can look at it?
Maybe pull the plug, insert a drinking straw into the cylinder, then manually turn the crank and bring it to TDC, feeling for the top with the straw. Then see if the mark you used is aligned.
Do you have the link to the timing so we can look at it?
I have taken some pictures of what I mean about the timeing if you look at the fly wheel you can see it has 4 marks I'm not quite sure which one I should use
#13
03-10-2017, 09:24 AM
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#14
03-10-2017, 12:26 PM
#15
03-11-2017, 11:28 AM
T is top dead centre, F is for checking the spark, though as it is fixed, many newer designs don't have this mark. Not sure what the others are. Are you sure you got the flywheel on the key, I seem to remember they can be tricky to get on without the key sliding out. The straw test will show if you have it wrong, as TDC on the piston should coincide with the T mark.
#16
03-16-2017, 04:50 PM
My internet has been off for a week, just got back on.
The cam timing in your pic looks to be off the mark. Enough to cause a problem if it is. Looks to be off by at least one tooth.
As mentioned, the "T" mark is for TDC, but I can't tell where that mark is supposed to line up. I would check the flywheel key is installed right, then find TDC and see where that T lines up, just to reference a fixed point so it can be used when the cam timing is reset.
The cam timing in your pic looks to be off the mark. Enough to cause a problem if it is. Looks to be off by at least one tooth.
As mentioned, the "T" mark is for TDC, but I can't tell where that mark is supposed to line up. I would check the flywheel key is installed right, then find TDC and see where that T lines up, just to reference a fixed point so it can be used when the cam timing is reset.
