PATSRAPTOR,

you friend that had the work done by mission Yamaha......what elevation does he run the bike at? also, do you know what he is running for jetting on the bike with the port work?

 

I had Trinity Racing do a MX port on my banshee. Runs great,it hits hard in the mid to upper range.[img]i/expressions/face-icon-small-happy.gif[/img] Running #30 pilots,#340 mains, K&N Filter w/ no air box lid,Delta V force reeds,Raised needle all the way up. Mainly at sea level to 2000'most of the time.

 

A buddy of mine has a 89 banshee and had Noleen Racing do his,his motorhas been a part a fews times for pistons and crank by another company and a yamaha mechanic, both said it was an awesome port job. FYI

 

I do my own porting using TSR software and dyno'd my three year old motor at 63 rear wheel HP, approx. 78 at the crank. I'm using a cool head, reed cages modded, T-5's and a degree key. All else is stock.

 

I had a 420 Stroker using a 7mm crank built with mild porting. Its now an awesome dune bike, torque everywhere!
V-force, timing plate, stock head work,flywheel lightened. If I had the exhaust raised up a few MM it would really rip!!!But Im happy for now...

RoostKIng