My 350 Jumbo had a 15 tooth countershaft sprocket which looks gigantic. Does anyone know what the original set up was for front and rear? 

Also are there supposed to be spacers between the front sprocket guard and the engine cases?

 Thanks 

13T /38T. I don't think there are any spacers if you run the 13T front sprocket as it basically envelopes the sprocket to prevent a derailment destroying the cases, mine doesn't have one so can't be 100% sure. I'll attach the parts manuals.

350TLSWM1983.pdf

350TLSWM1983-2.pdf

PS: Some of those part numbers are all messed up, front sprocket should be # 29, not #27. You'll see what I mean.

Edited February 5, 20188 yr by fourex
PS added.

Thanks Fourex. Thirteen tooth on order!