Originally Posted by
Revo Dan
I'm new to this so do you think 80 spurge and 38 pinion
http://www.serpent.com/file.php?FileID=5257
Here is the FDR calculator which will allow you to select the right spur/pinion for the 411.
38/80 in 48dp would give you 4.2 but I doubt it'll fit unless you have the v3 motor mount.