Hi Rich450es
Hi as you might know I am in the middle of a 450- 400 engine swap.
Looking at all forums/posts,this should be relatively straight fwd.
I have all the bits from a 98 trx450s.main issue seems to be the rear output shaft is longer on the 450 engine,on measuring the swing a and drives they are the same lengths.on everything so what am I missing the ouput shaft is about 1,1/2 inches longer on the 450 so do I change shafts?
Hope you can help many thks roryj