2slow350

I would try a 14f-43r, but a 13f-41r would be fine and be easier to change out. Jmo

Putting vitos pistons in are nothing like porting a motor or like you say hand porting one by putting pistons in a bike. I believe it may run a lil better do to changing from factory cast(heavier) pistons over to your new forged(lighter) pistons, but jetting should stay the same.. Jmo Also I'd recommend wisecos next time, bc I heard vitos pistons are shorter and tend to wear out faster..

The WSM pistons have a problem of cracking on the bridge of the widows, for the performance side I always hear good things do to the design measurments. I wouldn't run them, I also believe they maybe cast aluminum ..

One of my best bikes i own has now 100 over stock cylinders that and are fully drag ported by Jeff prolly 6-7 years ago. They will pull 80+hp all day on methnol, no problems :biggrin:

117 on a "trail Bike" in the 1/4??? ::

35pwk's is going to be the best choice, 39's if you were going to put it on alky...

First, I would get rid of the boost bottle bc there junk, then if its not electrical id check the reeds and see if they are busted or cracked...