[ace.cafe]

Works for me, looks and sounds sweet!
In the flesh, how do these roller rockers sound compared to out sewing machine tappets?

I think it's probably about the same sound. Maybe some minor differences, but it isn't intended to be quiet.There's actually more lash in these than in the stock rockers.

BTW, that's .510" valve lift that you're seeing there, and it's flowing over 230cfm at peak lift. 

[armando_chavez]

any new news on this GP Head?

[Guaire]

Sounds like a gun.

[ace.cafe]

Yes, we are still playing around with pushrod lengths. The bike is running and riding around. Giving very good power, with a good surge at around 4k rpm, and really going strong at over 5k rpm.

When he is finished and makes a video of the finished result, we will post it.