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Post by chaslittell on Oct 9, 2011 21:53:58 GMT -6
Y'all: I bought a 2011 150 MC-75 a month ago. I love it. But it was delivered with the valves at zero (or minus!) clearance. I set them to .004". Then yesterday a I bought the wife an MC-16, "vintage" Vespa style 150, 30 days assembled 150KM sold cheap 'cause it wouldn't start when hot. Guess what? It was the valves, again zero or less clearance. I had to drive it home, 100 miles (whew, what fun, thru the Cinci ghettoes at sunset!), and hope it was the intake not exhaust bleeding compression when hot. 300KM on a tight exhaust might be enough to burn the valve (opinions?). But now it is set and runs like a top. 10" wheels accelerate faster than 13. Anyway, SET YOUR VALVES FIRST THING ON DELIVERY!
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Senior Clinician
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Retired Army War Veteran Living The Good Life
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Post by trancebear on Oct 9, 2011 23:33:35 GMT -6
Y'all: I bought a 2011 150 MC-75 a month ago. I love it. But it was delivered with the valves at zero (or minus!) clearance. I set them to .004". Then yesterday a I bought the wife an MC-16, "vintage" Vespa style 150, 30 days assembled 150KM sold cheap 'cause it wouldn't start when hot. Guess what? It was the valves, again zero or less clearance. I had to drive it home, 100 miles (whew, what fun, thru the Cinci ghettoes at sunset!), and hope it was the intake not exhaust bleeding compression when hot. 300KM on a tight exhaust might be enough to burn the valve (opinions?). But now it is set and runs like a top. 10" wheels accelerate faster than 13. Anyway, SET YOUR VALVES FIRST THING ON DELIVERY! Thanks for the FYI, I learned valve adjustment from YouTube the day I bought my scooter in my sig. |
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Scooter Doc
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Post by sprocket on Oct 10, 2011 9:53:10 GMT -6
yup.. I have said this for years... nobody believes me so I don't bother anymore...
I would estimate that 40% of scooters have tight valve gaps or no valve gaps on delivery...and from there the situation simply gets worse...
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Post by Bashan on Oct 10, 2011 12:27:29 GMT -6
nobody believes me so I don't bother anymore..
Anyway, you'd have to hammer those valves a lot more than that to do some serious harm. If you're worried run a compression test but if it's running OK I wouldn't bother. Rich |
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