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  1. Chinese/Import Minis - General Discussion
    2021 SSR SR140TR-BW Recently bought this from first owner did not take very good care of it. No maintenance done, used ethanol gas. Backfired like crazy, see the popping flames in exhaust. So got a new plug, cleaned carb, put fresh real gas, adjusted the valves to .003 intake and .005 exhaust at...
  2. Chinese/Import Minis - General Discussion
    A few weeks ago I fell of my bike While I was practice riding and then I fell while I was turning. After I turned my bike on again it started backfiring and after I checked the spark plug, it was as black as the night sky. I tried tuning the carby, not that I know how to and it still makes that...
  3. Z50, CT70 and JDM Monkeybikes
    Hi, I have a Z50R (1990-1999?, not sure the exact year) but it has a Chinese 86 cc engine on it. I'm not sure the brand of the engine, all I know is that it says "RCM" on the side. Anyway here's the problem. It has developed a crack in the bottom of the engine and started to leak oil. It...
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