Titanium valves/springs/retainers in a 650R?

7 replies to this topic

Posted November 13, 2007 - 03:01 PM


Does anybody have used them in a 650R?

Intake /exhaust valves + springs and retainers? Pro/cons?
Any good brands/dealers with good prices/services?

I would use them with a 680 kit and a stage 2 Hotcams,I have now Kibblewhite 1mm os intake valves and oem size Kibblewhites exhaust .


Posted November 14, 2007 - 03:31 AM


:ride: anyone? :thumbsup:

  • crmc33

Posted November 14, 2007 - 04:58 AM


Do you mean just Ti retianers with hi lift springs and black diamond valves? Or do you mean Ti valves?

I have used the former a lot on my 650L based racer with no problems


Posted November 15, 2007 - 03:52 AM


I have back diamond valves in now but want the valvetrain as light as possible , I will lighten up the flywheel also so the 680 hc piston can rev as freely as the 650. Will put a Falicon rod in to be sure. :thumbsup:

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • crmc33

Posted November 15, 2007 - 04:39 AM


If you want Ti valves then it means new suitable valve seats too

  • bork

Posted November 17, 2007 - 06:04 AM


I know less weight means less valve float on higher RPM. But what kind of RPMs vcan be safely hit on the 650? & the trade off is the Titanium wheres faster. I was going to do an engine back about 5 years ago, & put things in prossective & opted not to. Check with Rob@barnumspro.com & maybe he has done it & have input for you.

  • HeadTrauma

Posted November 17, 2007 - 10:42 AM


If you want Ti valves then it means new suitable valve seats too

Yeah, usually ductile iron or beryllium bronze.

I really doubt the performance gain would be worth the cost and shortened life on anything but a maximum effort racer. Good swirl-polished stainless valves, stiffer springs, and Ti retainers will hold some high rpm and will last longer.

Ti valves alone will probably cost $120-150+ apiece, especially if they aren't a standard size already offered by a manufacturer AND if they are only sold in small lots.

  • weskc35k

Posted November 17, 2007 - 06:24 PM


Yeah what's the point.

Related Content


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.