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Honda Z50m - Tune up
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<blockquote data-quote="69ST" data-source="post: 190294" data-attributes="member: 5"><p>Don't see many of these rare machines.</p><p></p><p>Compression testing a 49cc motor is a little challenging. I've never seen more than ~135psi on my gauge and that is, without a doubt, owing to the hose length. Seriously, the only way to get a true reading would be a gauge that can be directly fitted to the plug hole. It doesn't really matter, in this case. As long as the engine has no oil control issue(s), the intake port is clean and compression feels strong via the kickstarter, the engine most likely is healthy. As long as the oil has been kept clean, these little 50s have incredibly long cylinder, piston & ring life.</p></blockquote><p></p>
[QUOTE="69ST, post: 190294, member: 5"] Don't see many of these rare machines. Compression testing a 49cc motor is a little challenging. I've never seen more than ~135psi on my gauge and that is, without a doubt, owing to the hose length. Seriously, the only way to get a true reading would be a gauge that can be directly fitted to the plug hole. It doesn't really matter, in this case. As long as the engine has no oil control issue(s), the intake port is clean and compression feels strong via the kickstarter, the engine most likely is healthy. As long as the oil has been kept clean, these little 50s have incredibly long cylinder, piston & ring life. [/QUOTE]
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Honda Z50m - Tune up
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