I have my Triumph gearbox apart for a refresh and while going thru the vari= ous tolerance checks,one of the thrust washers is too thin by 0.015 inch. = This part retains the 1st gear axially on the trans shaft. This part is no= longer available in any thickness - originally this part was available in =4 thickness ranges.
The other alternative is to turn a thrust washer on the lathe out of some m= ystery steel. Problem is that I have a difficult time parting off and keep= ing the cut square. I do not have access to a surface grinder.