I have my 00 GPR with 1500 hrs on it, the valves are still fine, no problem at all.

I am getting the R&D Valves, I heard someone saying here that when fully open they dont match the port, is it a problem ???

Should I get OEM Valves (-10 version)

Any comments please ??

Hopefully that will be corrected. -10's would work just fine. Also most people don't realize that the R&D valves use the 2000 GPR brass bushing size (shorter) So not sure if the longer bolts on newer GPR's, XLT's, GPR800's, will bottom out or not. No biggie to get the shorter ones, or shim the longer one, but info folks need to know. Just get shorter bolts. Maybe R&D will include and why did they choose the shorter style?
Anyone know?

Stefan you meant 150 hours right not 1500?

I would wait till riva or R&D get the valves to match,better flow better go.

They never matched the gas valves...... good luck

[ 01-21-2002: Message edited by: Fercho ]

They what?

[ 01-21-2002: Message edited by: PRO-FX1 ]

The end tips of the gas valves did not clear the exhaust port. I had to get mine machined.
I do not know about the R&D valves

When the r&d valves are all the way up,they sit to far up in the port making a hole.

The stock ones do also

Thats why riva is going to make there`s match at the top like they should be,or why would you want to buy the r&d valves,just for the arm,don`t think so.

Brett It was a mistake i meant 150 hrs

My answer is, this will effect performance or not ????

If I wait for Rivas, whats the difference if it matches the port exactly ??

Thanks