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Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
Posts: 13,088
Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
Do you really need measurements?
Surely you need something to fit into the channel in the swingarm. Measure the width of the channel and make the block that size (square).
The important bit is having the adjuster bolt on each side that locks into the swingarm itself.