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How to identify Final Drive Ratio...?

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radguzzi:

I have a surplus Tonti Final Drive unit that I would like to sell and need to be able to identify what the ratio is.  How does one go about doing that...?  From the outside...

The only marks on the castings are Part Numbers so I am guessing that is not going to be a help.  The only other number is a number "11" stamped into the bearing hub.

I would venture a guess that it is the more common 8/33 however, I honestly do not know.

Any ideas folks...?

Thanks,
Rob









 

Bob Wegman:
How about rotating the pinion and counting the revolutions needed to rotate the wheel hub gear a complete revolution.

mtiberio:

--- Quote from: Bob Wegman on October 26, 2021, 12:55:01 PM ---How about rotating the pinion and counting the revolutions needed to rotate the wheel hub gear a complete revolution.

--- End quote ---

first principles

Antietam Classic Cycle:
Or pull the pinion carrier out of the case and count the number of teeth on the pinion gear. You'll want to inspect the teeth for damage anyway (and take photos for any prospective buyers).

Petrus Rocks:
What Charlie said.  It's off a V11, correct?

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