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Re: TDC at compression stroke
Very important thread to keep your engine sound and well. Just two more tips if I may. Do this during service when oil is drained as some might come out of the side hole when the engine is turned. If not sure if the valves are on rocking point, you can undo the cover on the top of the engine exposing the gear and valve drive. On the gear and casing is "dot" marks that should correspond. On the Loncin LX250GY or CBP engine the cover is secured with two 8 mm nuts. On some other engines the cover has a 10 mm nut on the other side. See picture. It is essential to remove the fuel tank on most bikes to do this task.
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ChinaV, I used your moving engine image on the maintenance page of my blog if its ok with you.
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