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- Nov 12, 2012
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- 4
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Hi all - I've just bought an Alton starter kit and running an existing RGM belt drive primary. The instruction with the Alton are not that specific, other than you have to turn up your own spacer for both an RGM or Norvil belt drive. I've measured the gap between the face of the front pulley (when both the sprag spocket and the starter motor sprocket are inline) and the sprag at around 6mm (no room for the front pulley keeper - so removed that). The supplied spacer has a 4.7mm recess which ensures the sprag has a minumum air gap and when tightened grips on the centre diameter. I can envisage a new spacer to work with the RGM belt drive of 6mm thick with the 4.7mm recess (same as that supplied) and with a large outer diameter of 100mm several mm's thick to act as the front keeper for the belt.
So my questions (at last) - has anyone made this before and have all the correct diamentions for me to machine up?
Can it be made of ali, or needs to be mild steel, due to the torque of the crank shaft nut?
Anyone have a simpler solution to the above?
The bike is a '72 Combat 750 Roadster.
Thanks all - Paul.
So my questions (at last) - has anyone made this before and have all the correct diamentions for me to machine up?
Can it be made of ali, or needs to be mild steel, due to the torque of the crank shaft nut?
Anyone have a simpler solution to the above?
The bike is a '72 Combat 750 Roadster.
Thanks all - Paul.
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