I know the CB500 and CB550 trees go into the 350, im pretty sure the 450 trees work too, the stem length may be off though. I just picked up a CB500 triple off ebay, it has the removable bar clamps. Might be useless though, since i think i have 37mm forks... i think ill have to get a CB550SC (nighthawk) or FT500 (Ascot) trees...