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Post by kpfoten on Sept 2, 2013 21:17:39 GMT -5
Thanks for the help--the piston was nasty and showed definite signs of blow-by and seizing.
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Post by kpfoten on Sept 2, 2013 15:19:50 GMT -5
Let me guess--it's not supposed to be easily spun with your hand? I feel a little resistance but not much...  |
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New Rider
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Joined: Sept 2, 2013 10:30:41 GMT -5
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Post by kpfoten on Sept 2, 2013 13:02:09 GMT -5
Not much previous history on it other than a missing cdi box and exhaust manifold bolts gone. With a low milage scooter I wonder how it could have lost compression? Maybe something to do w exhaust?
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New Rider
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Post by kpfoten on Sept 2, 2013 10:52:28 GMT -5
My 2008 Hammerhead 2stroke starts and idles great (it was a freebie that the previous owner had problems with). When I open the throttle it increases slightly but I can only get going to about 5mph. On occasion, on the stand, I can get it to rev up high and the back tire spins accordingly. But usually on the stand, when I give it WOT it won't rev up. It only has about 240 miles on it.
Here's what I have:
New Carb (tuned--the old one gives me the same result)
New filter, hose, vac petcock, good vacuum, sprayed around with ether, no leaks.
New CDI box
New Coil, gapped plug
Compression about 120
Throttle cable/mechanism inspected
cvt cover removed, inspected, seems fine
air in tires, rear brake seems ok
Premium gas, good flow to carb
Checked reed valves
Muffler clear, no exhaust leak.
Frustrating because it seems like I've gone through nearly every possible scenario. What am I overlooking?
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