[Fot] TR-4 Valve Spring Cap / Collar dilemma

[John Styduhar]

The larger aftermarket valves offered by BPNW also have the radius groove
for the keepers.

On Sun, Jan 3, 2016 at 8:32 PM, Steve Yott <tr4 at wi.rr.com> wrote:

> In addition to this is Triumph seemed to use their own design for the
> locks.
> Normally a lock has a somewhat square shaped ring on the inner surface and
> the valves use a matching grove.  Triumph uses a radius lock and matching
> radius groove in the valve.  I have never found a usable replacement lock
> on
> the market and keep a supply of used Triumph parts!
>
> IMHO, I would not use any aluminum alloy retainers as they will wear
> quickly.  What we need to do is find someone to reproduce the excellent
> retainers that Ken supplied...
>
> Steve Yott
>
>
> -----Original Message-----
> From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Tony Drews
> Sent: Sunday, January 03, 2016 7:16 PM
> To: fot at autox.team.net
> Subject: Re: [Fot] TR-4 Valve Spring Cap / Collar dilemma
>
> Follow up question - does anyone know the angle of the valve keeper for the
> 5/16" valve stems?  I'm trying to cross reference to a commonly available
> valve spring retainer / collar.
>
> My measurements are showing 5 to 6.5 degrees.  I've found retainers for 7,
> 8
> and 10 degree keepers with either 1.375 or 1.365 OD.  1.375 seems to go
> with
> 7 degrees, 1.365 seems to go with 8 or 10 degree.
>
> Interesting detail - the new alloy retainers from Moss don't fit the new
> keepers from Moss very well.  I think their retainers are either mislabeled
> or for a different combination of parts...
>
> Cheers, Tony
>
> At 06:36 PM 1/3/2016, Tony Drews wrote:
> >I'm going through my TR-4 head.  Since BFE seems to be out of action, I
> >purchased aluminum valve spring collars / caps from Moss.  I find that
> >they are smaller diameter than the cool titanium ones I'm running and
> >smaller than my current springs.  Unfortunately, the Titanium ones are
> >wearing and need to be replaced.  I don't have stock parts on hand to
> >compare to, so I'm not sure if the Moss part is undersized or if I'm
> >running larger than normal diameter stuff from Ken.
> >
> >The valve spring collar I've removed is 1.365" diameter, the outer
> >spring is 1.380" diameter and the alloy spring collar from Moss is
> >1.260" diameter.
> >
> >Anyone know of a source of lightweight valve spring collars for the
> >1.380" springs?
> >
> >TIA
> >
> >Cheers, Tony Drews
> >
> >_______________________________________________
> >fot at autox.team.net
> >
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