Topic: Valve spring booster shims

[bwaller]

Hi guys. I'm looking for shims to set spring pressures in a 500/550 head. Minimum ID is 0.737" maximum OD is 1.050", and I believe I can live with some at 0.015" thick.

Does anyone have a more modern 4 valve head apart with shims that might come close? I HAVE finally just found a place (after many calls) where I can buy some that are 0.765"ID & 1"OD but wonder if I might be lucky enough to get something closer.

Thanks

[754]

With a shim punch kit you should be able to knock out .750 id and 1.060 od (if they go that big).
 If there was a bit of demand, be easy to make a punch, or they could be made on a lathe..

[bwaller]

Thanks Frank. I don't have a shim punch kit & it may be faster & cheaper to just buy these shims and run with em.

[lordmoonpie]

Brent,

They might not be cheap but have you tried DelWest in the USA? They do all kinds of shims and will make anything to spec. if it's not stock.

[kos]

I have a DOHC apart and the standard shims are .040" thick. 

KOS

[kos]

Just found some .035" shims from KPMI 5mm CB750 conversion kit.


If you need, let me know. Free to SOHC guy.

KOS

[MRieck]

Just found some .035" shims from KPMI 5mm CB750 conversion kit.


If you need, let me know. Free to SOHC guy.

KOS

I have some those too Mark but I think he wants a tighter ID.

[754]

A CNC punch could knock em out fast, I assume you want steel if they are that thin..

[turboguzzi]

cant you ground some down on a face grinder with a magnetic holder plate?

[bwaller]

I have done some, the problem is at 1mm they heat so quickly.

I've got shims on the way.