R 433 motor

giver85

giver85

New member
Joined
Dec 10, 2007
Messages
5
Age
49
Location
Alberta Canada
Hey guys there is some great info and stories on this site. Some very smart dudes and some great history. I just got a r433 motor with some other stuff, was wondering what this may have come out of. It is a free air with a single pipe, looks like it had dual carbs. I think the sr had dual exhaust and ss was fan cooled, is this a snow jet motor it has no yamaha prefex number. Also wondering if there was much difference in the GPX XA to XB motors?
 

433r cylinders where used on the 71 SR433 and the 72 GP433. You may have GYT kit 4 bolt heads on those cylinders if the heads are freeair.

Mark
 
RB cylinders are from a 72 SR433. Sounds like you have a 72 SR/thunderjet 433 motor,but with a single exhaust put on.

Mark
 
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