I see that there are a number of part numbers, but having just sorted through a large pile of them, I only found two varations. One being longer than the other. Did I just happen to look at a non-representive sample of 650 mainshafts?
Re: Triumph 650 Transmission Mainshafts#99445 09/02/063:22 am09/02/063:22 am
boy, this is gonna hurt my hand, but here goes. just picking out the salient specs from chart
t 914 up to 67 std and wide ratio stepped shaft 16 teeth cei threads t 1177 up to 61 (67???) close ratio stepped shaft 18 teeth cei threads t 2436 68-early69 std and wide ratio stepped shaft 16 teeth unf threads t 2438 68-early69 close ratio stepped shaft 18 teeth unf threads t 3893 early 69 std and wide ratio stepped shaft 16 teeth shaved gear t 4154 68-early 69 close ratio stepped shaft 18 teeth shaved gear t 4158 late 69-70 std and wide ratio non stepped shaft 16 teeth shaved gear t 4173 late 69-70 close ratio non stepped shaft 18 teeth shaved gear
Thank you so much. This is the sort of concrete information I have been looking for. Was this compiled or was there one source for it.
As I have delved into learning more about vintage Triumphs, I have found that there are plenty of opinions, plenty of "This is what I was told", plenty of "This is what worked for me", all of which is all very helpful.
Even so, it is so nice to find a large lump of useful information in one place
Thanks to everyone that puts up with the questions, even though they may have been asked before, and does not just say "GET THE manual". There is way to much needed information that never made it into a manual
info is from "glenn's triumph two cylinder motorcycle repair" 1973 edition
sorry but don't know what shaved means but i have checked my early and late 4 speed shafts and there appears to be about a 10 thou difference between the shaft diameters and the gear bores of early to late ie my 70 bonnie parts to the older stuff that i have