gpx hp and rpm rating

[338gpx]

can anyone tell me the hp and rpm rating for the 74 & 75 338 and 433 gpx
thanks

 

[YAMMIEGOD3:16]

1974
338 GPX
44 HP @ 8000
433 GPX
55 HP @ 8000
1975 338 GPX SAME SPEC. 1975 GPX 433 HAD SLIGHTLY MORE HP. RPM SAME. ALSO WAY MORE HP ADDED WITH OPTIONAL GYT RACE KITS. 3:16 (yammie tony)

 

[RJH]

Are you sure?

The rpm was not an even number - I'm thinking 8250? but can't remeber for sure.

Where would you get that from? That was never posted back then.

 

[YAMMIEGOD3:16]

1974-75 YAMAHA DEALER TECH MANUAL. 3:16 (yammie tony)