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Megelli 250r valve adjustments tdc

Discussion in 'Megelli 250cc' started by miguelcastro, Jun 29, 2014.

  1. miguelcastro

    miguelcastro Member

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    What marking on the flywheel/rotor that I need to align with the line to put the engine on a compresion stroke(top dead center) so I can adjust the valves.
    And what is the valve clearance?

    20140629_201424.jpg
     
    miguelcastro, Jun 29, 2014
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  2. TechHeadFred

    TechHeadFred Well-Known Member

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    :welcome:

    Risky is our resident Megelli expert - he might know or be able to point you in the right direction.
     
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    Last edited: Jun 29, 2014
    TechHeadFred, Jun 29, 2014
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  3. miguelcastro

    miguelcastro Member

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    How do I contact him? And thanks for a quick reply :)
     
    miguelcastro, Jun 29, 2014
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  4. risky

    risky risky

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    friend,, the valve timing is pretty savage. take off petrol tank and battery and some gear underneath till you see the tappet covers. remove and turn motor over till valves are at the top. i do this by pushing bike in top gear. inlet valve clearance is 6 thou and exhaust 8 thou. exhaust is harder to do and you need monkey fingers.if the clearances are out the bike will not start when hot .on my bikes the valves came from the factory at 2 thou.
     
    risky, Jun 30, 2014
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  5. miguelcastro

    miguelcastro Member

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    So the marking on the photo dont mean anything? Because I adjust the valve already with that line together
     
    miguelcastro, Jun 30, 2014
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  6. miguelcastro

    miguelcastro Member

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    Im having troubles finding the top dead center. Cant take the spark plugs out as I dont have the right size tool.
    Any ideas on how to put it on the tdc.
     
    miguelcastro, Jun 30, 2014
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  7. risky

    risky risky

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    need right size socket
    but once the valve is closed it can be set.
    tdc is not needed.
    the valves have little movement between open and shut.
     
    risky, Jun 30, 2014
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  8. miguelcastro

    miguelcastro Member

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    So when I turn the engine over I can adjust it when there's movement on both valves . Thanks heaps I'll keep u updated
     
    miguelcastro, Jun 30, 2014
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  9. risky

    risky risky

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    have one valve at max closing, adjust it and then do the other. inlet on carby side, exhaust on muffler pipe side.as far as i know threr are no manuals available
     
    risky, Jun 30, 2014
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  10. miguelcastro

    miguelcastro Member

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    I adjusted it already runs smoothly but when I turn the throttle it dies ? Help plss
     
    miguelcastro, Jul 1, 2014
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  11. risky

    risky risky

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    put a manual fuel tap on and block the vacuum line.
     
    risky, Jul 2, 2014
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  12. miguelcastro

    miguelcastro Member

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    Hey risky I still hear ticking noise after I adjust the valves already and the bike seems to rev pretty high 2500rpm-3000rpm. Cam chain tensioner maybe?
     
    miguelcastro, Jul 3, 2014
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  13. risky

    risky risky

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    is the noise in the top or bottom of motor?the starter has an over ride ratchet on the crank, right hand side.would have to be along side motor to pick source. basically it needs a local mechanic and as the importer has collapsed the bike is now an orphan for parts.motor is zongshen and is used in other bikes from china.
     
    risky, Jul 3, 2014
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  14. miguelcastro

    miguelcastro Member

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    Top man I can hear it on the location of the valves
     
    miguelcastro, Jul 3, 2014
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  15. risky

    risky risky

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    wind motor till each valve is at the max closed position and reset valves on the tighter side.this is your next step before delving in motor.i know the starter over ride clutch operates on a ratchet system and they have played up.have you cleaned the oil filter. rhs ...2 6mm nuts and pulls out and can be washed.
     
    risky, Jul 3, 2014
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