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Home › Forums › All Things 750 Twin › Technical Garage › chain to belt?
is it possible to swop over to belt drive on a std b1 engine
Simple answer to that philpass is no. This is because of the frame where the belt would pass through. On the K models the leg is wider to accommodate the belt.
Not using a b1 frame,I have a cunning plan
Not using a b1 frame,I have a cunning plan
So are you asking if the front sprocket from a belt drive will fit on a B1 shaft?
U mmmmmmmmm, yes
OK.
I have not tried this but I have looked into it in some detail. I can confirm the spline on the belt drive front pulley and the front chain sprockets are the same. The rear pulley will fit to a chain drive sprocket hub. I do believe the rear hubs are interchangeable.
My main reason for not being 100% sure is that the final drive shafts for the B and K models have different part numbers. I don’t know why this is but can’t see why that would cause a problem.
Guys,
belt sprocket will match the shaft, but shaft is longer and there is a different (longer) spacer used.
But it will not work !!!
Think about the clutch pushrod of the earlier engines.
There is no space to fit the pushrod and the front belt pulley.
It might be possible to swap the clutch actuator to the one that is used at the BD-models (swap clutch engine cover and some more and internal parts).
E.g. you will need the drive shaft cover of a BD to close the hole which is used for the pushrod.
Here is a pic how it looks like at a BD-model:
Hi Muchael
Thank you for your reply and knowledge. I did ring Philpass last night to discuss the issues most of which is in your reply. However you have now explained the different part number for the final drive shaft. Thank you again for sharing your knowledge.
Cheers all
Your welcome 😉
Sure I will pass on my knowledge and experience. There is no reason why I should keep it as a secret.
Cheers, Michael
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