GPX 338 Rpm

[SR643]

Does anyone know what rpm the stock 338 gpx should run at.

 

[YAMMIEGOD3:16]

8000 !! 3:16 (yammie tony)

 

[montynormand]

I have copies of the gpx 338/433 gyt manual if anyone wants one. mail me a $10 bill and I'll mail your copy.

 

[SR643]

Thanks

 

[338gpx]

A friend dyno'd 1 and he found the power at 7200

 

[YAMMIEGOD3:16]

8000 # CAME RIGHT OUT OF YAMAHA SHOP MANUAL. BUT YES, DYNO REALLY CAN TELL YA. 3:16 (yammie tony)

 

[modsingle]

Thunder Jet RPM

What would be the RPM for the 1945-75 Thunder Jet with the 338? Only reason I ask is the difference in exhaust. Thanks

 

[YAMMIEGOD3:16]

THEY MADE A THUNDERJET IN 1945 ? 3:16 (yammie tony)

 

[modsingle]

Correction

Thanks for the correction 1974 -1975 Thunder Jet, now do you have an answer god???????

 

[YAMMIEGOD3:16]

85-8800 ON THE 340 T-JET !!! 3:16 (yammie tony)

 

[thunderjet440]

How about a 433? i remember mine with the stock carbs and clutching would run up to 8600,now i have 75 heads and cylinders mildly cleaned up with the combustion chamber mod ,40 over wiesco's,hewtech cdi and a set of 38 mm mik's.i'm thinking it should be in the 8400 to 8600 rpm? it will be run on the ovals in the superstock class

 

[YAMMIEGOD3:16]

SOUNDS RIGHT. 3:16 (yammie tony)