I just built my 450r and took it out to break it in today and i'm proud to say it pulls very hard. I'm taking it in to be dyno'd next friday, Estimations? I'm guessing close to 50hp. Uni filter, 12.1 piston, webcam, rossier exhaust. place your bets.

you get 50 and you should be real happy.

with a stock head, i would guess you to be in the 46-47 range.

when i stepped up to a similar set up as yours, i was real happy with the way mine ran. they should be that fast stock IMO.

I have mine post 4 posts under yours. scrapper450r is right, you will not get above the mid 40s unless your head is ported. I'll guess 44. Be sure to post it.

43.
Maybe 42 1/2.

7 h.p. over whatever the dyno reads for a stock '05. Which is almost a 20% increase.

Im now porting and polishing the head and moved dyno tuning to next thursday change in estimations? im still lookin for that 50 mark on pump gas.

lets see the dyno sheet