large mod 1 pinions

[lincpimp]

A few options:

You can use a tdr colleted adapter and run the thread on gears Mike sells in the rcm store, use the 2nd speed gears.

You can also use the 2 speed adapter that mike sells, but you may have issues with the gear unthreading when you brake or reverse.

Go to sdp-si and try to get something that will work. Stainless will be your best bet, but you will have to use the plastic 63t spur as those gears are not hardened.