Calculating Best Belt Length

[krr]

This was posted back in Jan/2013 but I didn't see any replies. Anyone care to shed some light on the following question regarding belt length???

 Is there a way to take measurements between the drive clutch and the driven clutch to figure out the length the drive belt should be. I'm guessing you need to measure between the center bolts, and the center line of each clutch to the top, but I'm really not sure, and then how do you add all your measurements together.

[Vintagesleds.com]

[Docjim]

If you know the stock clutch to driven distance,  you can add or subtract that from the new distance and add or subtract by 2 allowing for the upper and lower length.

[snowracer]

Remove clutch springs and when clutches are fully engaged, your belt should be tight.

[krr]

I like removing the springs idea and test fitting. My other question is should there be any deflection on the belt when it is fully tight? Like say 1/4" or so. I imagine the belt being rubber may take that up....just asking.
Thanks for the good tips guys.

[snowracer]

I'm sure that there is going to be some deflection but I know of no set amount. Obviously the greater center to center distance, there will be more deflection.

[PolCat]

I like removing the springs idea and test fitting. My other question is should there be any deflection on the belt when it is fully tight? Like say 1/4" or so. I imagine the belt being rubber may take that up....just asking.
Thanks for the good tips guys.

There will be no deflection when both clutches have engaged, there can't be!

[krr]

Point taken. Thanks!