The only dyno graph of a stroked Raptor I've seen was a 770 and it didn't rev very high. At the last FSW though, a stroked 770 Raptor from FL took the trophy in the big bore class. The larger the piston and/or longer the stroke, the slower the quad will rev but the more torque it will produce. I know a few builders that are having good results with stock bores and mild strokers. There isn't one magic formula to get power out of a Raptor motor, lots of different combinations will work if you take the time to tune the quad to the engine.

 

actually it was a GP Racing 780 raptor. they started producing the pistons after this years wars, so they will show up in january. as far as them revving slow, this si true, but one they build the revs they build the power and off they go. hence why the 780 was slow off the the line then mid way up the hill the stroker took over and pulled to the top to victory in every class. in order to compensate for a slow revving big bore, they run very light pistons and very light rods, and then thye revs very fast.