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Old 06-02-2011, 03:39 PM
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Al.Fisherman Al.Fisherman is offline
Motorized Bicycle Elite Member
Join Date: Sep 2009
Location: Calera, Alabama
Posts: 1,966
Default Re: 49cc head gasket, torque?

The manual misses that part, at least in every one I've read.

To answer your question on torque and not a WAG.. here are the recommend torque. I got these online using steel studs in aluminum. Have never blown a gasket in 5 engines, have never stripped a stud hole or stud.

8mm torques to 150 to 204 INCH POUNDS
6mm torques to 50 to 60 INCH POUNDS.
Some engines use a 6mm head studs, I have one.

Most likely the head wasn't torqued to those specifications from the factory. If not use the head gasket and torque to above. I have used head gaskets more then once without leaking. Before you install the head, mill it. I have NEVER seen a true head. Using a piece of glass and 280 sand paper, sand gasket surface. Only remove what is necessary. The sanded surfaces will stick out apart from non sanded surfaces.
Looking for HT's parts?
HT pre instillation tips.
Engine running problems?
HT breakdown Photos

Ron ><)))))*> Calera, Alabama

Last edited by Al.Fisherman; 06-02-2011 at 03:46 PM.
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