R10S Valve sizes and Original Head Thickness ??
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  1. #1
    Fellow Frogger! R8philSA's Avatar
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    Default R10S Valve sizes and Original Head Thickness ??

    Probably one for Simon.
    Sorry for asking again but somewhere I misplaced the original info I had.

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    Inlet and Exhaust Valve sizes for R10S ?

    Original thickness of R10S cylinder head. ?

    many thanks

    Phil

  2. #2
    Simon's Avatar
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    I'm sure the question has been answered before, but here is a slightly more beefed up reply.

    The 688-09 motor fitted to the later 8S and Australian 10S had the following sized valves (R10 Normale in brackets):

    Inlet - 33.5mm (31.2mm)
    Exhaust - 30.3mm (26.8mm)

    Also note that the larger 10S valves were also fitted to the later 688-02 motor installed in the last few hundred R10 Normales sold in Australia (688-02 engine number 850650 onwards).

    Head height - 70.35mm
    Combustion chamber volume - 27.82cc
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  3. #3
    Fellow Frogger! R8philSA's Avatar
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    Thank you Simon.
    Promise I wont ask again, I have recorded the details this time.
    Cheers
    Phil

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