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Serious Problem with my scooter engine!

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  • Serious Problem with my scooter engine!

    Hey guyz this is a long story! but i need help

    6months back i had restored my dad's old scooter (BAJAJ BRAVO) it was working fine but after sometime i thought i should give it to a mechanic for servicing!
    he opened the engine and called me up saying tht my engine's piston has got some lines on it.(becoz i didnt put 2t oil in the engine after restoring it).and we cant use it anymore ! u have to change the piston
    so i spended about 3k for it...and after some days i was trying to open the carburetor and when i closed it back and started the engine ..it emitted a lot of white smoke...and it was accelerating on its own..so i gave it to a mechanic about 15days ago...he said that the piston is 'Fused' (i didn't get him) he said ull have to change the piston..i said i cant an told dhim to service it anyhow...and after some days i started the engine and it gave me a very annoying sound. so today i added lil 2t oill...and now when i was riding it ..it emitted a lot of white smoke and the engine is continuously misfiring ..as if there is some blast in the engine i stopped it right away and parked it..

    now i dont know what to do..i cant spend more money on it , i want to fix it myself, please help me out!!
    Last edited by neshnt; 09-16-2010, 06:19 PM.

  • #2
    Originally posted by neshnt View Post
    he opened the engine and called me up saying tht my engine's piston has got some lines on it.(becoz i didnt put 2t oil in the engine after restoring it).
    Do you've an oil pump that is in working condition or not? Pls check that & reply back.

    Originally posted by neshnt View Post
    so i spended about 3k for it...
    For what? What're the works that were done on it? IMO, for a 3K job, you must've rebored the cylinder, changed piston & rings. Pls confirm with your mechanic on the work that was carried out.

    Originally posted by neshnt View Post
    and after some days i was trying to open the carburetor and when i closed it back and started the engine ..it emitted a lot of white smoke...and it was accelerating on its own..
    I hope the carb was fixed correctly, I mean to say, there were no leaky air intakes in the intake manifold. I once experienced the same on my Rx.

    Originally posted by neshnt View Post
    so i gave it to a mechanic about 15days ago...he said that the piston is 'Fused' (i didn't get him) he said ull have to change the piston..
    What's fused? Pls ask him about owing an explanation to you on it. Also do a compression test & check if there's sufficient compresion with the cylinder.

    Originally posted by neshnt View Post
    i said i cant an told dhim to service it anyhow...
    So what did he do? Details pls.

    Originally posted by neshnt View Post
    and after some days i started the engine and it gave me a very annoying sound. so today i added lil 2t oill...and now when i was riding it ..it emitted a lot of white smoke and the engine is continuously misfiring ..as if there is some blast in the engine i stopped it right away and parked it..
    Clean the spark plugs; adjust for the gap clearances; clean air filter; clean carbs & the jets; adjust the air+fuel mixture to give a right mixture.
    Skill is what keeps you on a Motorcycle
    Awareness + Skill is what keeps you out of harm's way
    ATGATT + Awareness + Skill means you might Live To Ride another day

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    • #3
      Cleaned the air filter , carbs ..adjusted the spark plug gaps also cleaned it!
      and now its working fine..infact better ! thanx a lot man!!

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