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    • Adjustable Timing Gear

    This product is manufactured exclusively by or for KEDO!

    Adjustable Camshaft Drive – Installation (Yamaha SR500 / TT500 / XT500)

    Item No.: K30543

    k30543.gif

    IMPORTANT!

    Changing valve timing requires solid engine knowledge. Only perform this work if you are experienced with Yamaha single-cylinder timing procedures.

    Functionality (what the wheel does)

    The angle between the index bores and the outer markings is precisely matched so that the camshaft changes by 1° when the timing chain is moved by four teeth and the index pin by one hole (equivalent to 2° at the crankshaft).

    Yamaha Original Setting

    • Flywheel mark aligned to OT (TDC).
    • “0” mark on the camshaft drive wheel aligned with the cylinder head cover sealing surface (per Repair Instructions).
    • Index pin in hole “0”.

    Examples

    Set Camshaft to 1° Earlier (≈ 2° at crank)

    • Flywheel mark on OT.
    • Mark “1” on cam wheel aligned to the cylinder head cover sealing surface.
    • Index pin in hole “1”.

    Set Camshaft to 2° Later (≈ 4° at crank)

    • Flywheel mark on OT.
    • Mark “-2” on cam wheel aligned to the cylinder head cover sealing surface.
    • Index pin in hole “-2”.

    Adjustment Range

    Maximum possible adjustment is 4° earlier (both labels to “4”) or 3° later (both labels to “−3”). (Cam degrees shown; crankshaft is double: 8° earlier / 6° later.)

    All information provided to the best of our knowledge, without guarantee. Ride safe!

    Reproduction, even in part, only with prior written approval. All rights reserved.