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Post by zephyer on Nov 18, 2020 18:25:20 GMT -5
Hi I am trying to adjust the valve clearance/lash on my partners Vmoto Eatate. I can't see anywhere to make adjustments? There is no nut on the end of the valve stem.
Any help would be appreciated
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Post by jloi on Nov 18, 2020 18:31:30 GMT -5
pictures please?
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Post by FrankenMech on Nov 18, 2020 18:56:23 GMT -5
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Post by zephyer on Nov 18, 2020 20:22:58 GMT -5
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Post by FrankenMech on Nov 18, 2020 21:50:29 GMT -5
You might want to find a service manual for that machine.
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Post by snaker on Nov 18, 2020 23:12:02 GMT -5
That's not a "GY6" style.
Looks to me like bucket and shim style. Common on motorcycles.
Measure gap and add/remove shims to set.
Yep, manual needed for sure.
The fork at the top of the photo, did you slide it off to the side?
Should add, some bucket and shim setups have the cam right above the valve with no rocker arms. So you have to find info specific to your design.
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Post by Steve B on Nov 19, 2020 13:09:44 GMT -5
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Post by pinkscoot on Nov 19, 2020 20:01:13 GMT -5
That looks like a 3 valve engine. Looks like a Vespa.
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Post by GrumpyUnk on Nov 20, 2020 11:11:20 GMT -5
Looks as if the intake rocker arm assembly is out of place. It would either run poorly and/or make a lot of noise with things situated like that. There is no easy access to adjustment of valve clearance. Roller tipped cam followers is a nice feature. A manual is very helpful, and likely a necessity to adjust the valve clearance properly. It may be that various thickness 'shims' are needed to effect adjustment. Some use coin sized and shaped metal of different thickness to adjust the clearance. Likely factory only parts, but after market may be available depending on the popularity of the model.
If that intake follower is out of place 'all by itself', that may account for a noisy engine, and give a possibly false impression valve clearance adjustment is needed. I'd slide the assembly back in place. In many designs, a spring is placed between the intake follower and the exhaust follower, keeping them mostly adjusted out near the supports of the shaft, and in place to work without interference.
tom
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