Well.... I finally got the engine rebuild project done on my P650. It now has BF750 crank, Wiseco 11.5:1 82mm pistons, P700 connecting rods, updated jack shaft, Web 150i cams, Muzzy headers and exhaust, Dynatech CDI, Twin Air Powerflo system, heads cleaned up by Flynt, carbs jetted 142/145, and needles shimmed. Took it out Sunday with a couple of Grizzly 700 EFI's, and an '05 BF750 with a Dynatech CDI, and a stock Suzuki Lt-160. We started dragging them down a gravel road. Drag was a bit longer than 300' I would guess. The Prairie spanked all comers. I was running 26" Mudlites. I can't wait to put the 25" stockers back on and drag them again.....
Here is a link to video of the drags.... First few are of the BF spanking on the Grizzly. The Grizzly has "pod mod" (EFI has been tinkered with), and different clutch weights, as well as a modified air box. Next few are of the Prairie racing the Grizz and the BF. Last one is of the little 160 getting dragged across a stream crossing that was a little too deep... It was a great day!
http://www.youtube.com/watch?v=vPB70SQLvEk