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Thread: Big end banging

  1. #46
    apriliaforum prov-nov
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    Thank you. I have model 200 but nobody seems to ship to Greece (I have asked some). There are no custom or other taxes within Europe.


    Today I measured the diameter of the crankshaft. It is 31,95-32,00 when minimum in manual is 32,01mm.
    Last edited by aware; 11-04-2018 at 04:46 AM.

  2. #47
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    Quote Originally Posted by aware View Post
    Thank you. I have model 200 but nobody seems to ship to Greece (I have asked some). There are no custom or other taxes within Europe.


    Today I measured the diameter of the crankshaft. It is 31,95-32,00 when minimum in manual is 32,01mm.
    So if you try to dress it/polish off the scoring then it will unfortunately be well below tolerance and not just marginal. Sorry I don't know a better source of parts for you.

    I wish you luck on finding a good shop who can sleeve your crank or possibly source undersized bearings and turn down the crankshaft to match them.

  3. #48
    apriliaforum prov-nov
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    Spoke to special shop today, they can't access the side with wear because of the sprockets. The tool can't reach.
    Today bought a second hand crankshaft in good condition for 180 euros.

  4. #49
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    Glad you found a reasonable solution. Now be very careful to ensure that all the oil passages are clean and open.

    Some of those engines have some very small orifices in the crankcase that spray a mist of oil in some locations and will result in hot spots and extreme wear if they become clogged.

  5. #50
    apriliaforum prov-nov
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    Thank you.
    The oil passages are difficult for me to to follow.
    For example, the oil holes at the bearing shells seems to be dead-end. Can it be?

  6. #51
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    Quote Originally Posted by aware View Post
    Thank you.
    The oil passages are difficult for me to to follow.
    For example, the oil holes at the bearing shells seems to be dead-end. Can it be?
    Likely they intersect at a sharp angle with another passage to get to the main feed. A rubber tipped blow gun is very handy for ensuring that you got them all cleaned out. G, B and E guitar strings used cautiously can also be helpful.

    Be very careful where you use sealant too so you don't clog anything when you put it all back together.

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