who makes a spring thats compatible with shim unders and is rated for over 10,000 rpm's? I think the Woods kit is only rated to 9500. does anyone know of any others? Thanks.

 

I suggest checking with Randall at HPR or Mark at On Dune Performance.

 

Not sure but, check Kibble White.

I've switched from the Pami springs to the Ron Wood springs. Hope they hold up better [img]i/expressions/face-icon-small-mad.gif[/img] I don't rev that high at all and I can't seem to get them to last more than a year.

 

DuneMe how do you test the valve springs to see if they are still in specs (good working order)?

 

Need the correct tool. Don't know if there is a tool to let you do it with the head on.

Unfortunately, I've been able to tell my valve springs are bad because they were broken [img]i/expressions/face-icon-small-mad.gif[/img]

If you rev the bike that hard I'ld replace them once a season. Especially if you have an aggressive cam.

 

I understand now, Thanks Mark. I guess I need the do a yearly check myself.

 

The Pami is a little taller than the Rw springs. I have had to shim the RW to get the correct seat pressure, None of them will last over a year (if that long after hard racing) The cycles takes the pressure down and they either break or float.

Like DuneMe said just the agressive cams will wear them out.

They can be tested on the head , but its better to take them off and get the correct hights for the setting.