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It has the D&D 904 kit with 12:1 JE pistons and nikasil barrels, equivalent of stage 2 head work, stock sized valves, reworked intake manifolds, matched manifolds/ports and carbs, thunderbike 270 -B cams, scepter pipes, K&N pods. I did the head work and assembly myself. THe current carb set up is on the original post.



I really think most people reading this forum should know you can get these numbers and better without spending so much time and money. I have stock carbs, stock airbox, and 125 mains with standard Wiseco pistons on my 904 and I have hit 60 at 5250 rpm where the torque and hp curvers cross on my dyno runs. There is nothing more important than having the torque and hp in the range you need it most. The main difference I see is that I let D&D do my work and listened to their advice. They talked me out of the freak, larger main jets and many other mods without seeing how to get the best out of what I had. I can't thank them enough for that. Even if the Wiseco pistons are less compression than advertised, I'm still getting all the results I wanted and have no gas problems with mid grade.

I never cared what the hp was at 7000 or 8000. We should all be trying to get more where it really counts 3-6K. BTW, my 7500 redline is at 75 hp and my max. torque is 65.54 at 3408 rpm.

No one step can get you more than the BB. I've said before, please do that first and see how much efficiency you can get out if it before making many of the other expensive changes.

Bob 2005 America, 904cc - sold. 2014 Trophy SE.