Triumph valve springs for Norton.

Torontonian · Oct 16, 2019

Just looking at page 49 of the Walridge Catalogue for fresh Norton valve springs Part no. 97-100 and I see a footnote stating : * Can use Triumph spring set Part no. PS104 ( T120/140 (also TR6/TR7 ) on Norton twins (recommended). Anyone know why before I complete this order ?

Torontonian · Oct 16, 2019

After 80 views and no replies I've sent the question to Mike at Walridge Motors.

850commando · Oct 16, 2019

why not just get the good stuff? Kibblewhite.

Torontonian · Oct 16, 2019

850commando said:
why not just get the good stuff? Kibblewhite.

Thanks, filled out order but shipping 2 Canada ? I'll wait for Mikes reply.

Bernhard · Oct 17, 2019

Interesting observation. Did you ask Walridge if the Triumph spring are the same poundage as per Norton?

Frankie17 · Oct 17, 2019

there are some differances outer triumph spring is 1mm smaller and inner spring is 3.5mm longer than commando and has more coils

so it may become coil bound when compressed

swooshdave · Oct 17, 2019

Maybe you didn't get any responses because no one would consider putting Triumph parts on their Norton?

Fast Eddie · Oct 17, 2019

If they’re all part of a kit, I would assume that the spring caps and / or retainers have been designed / modified accordingly to accommodate differences in springs and heads and valves. But, of course, that should be confirmed.

I guess there’s an endless list of what might work if modified accordingly... but personally, I’ll to stick to using parts that were designed for the job at hand. Norton gear in me Norton and Triumph gear in me Triumphs. Simples.

Torontonian · Oct 17, 2019

A busy Mike got back to me this morning.
" Norvil use the Triumph springs ( made by Velocette ) PS104 in all their race motors and if we buy Norton springs from Velocette we get the PS104 type in a Norton bag. Also SRM use these same springs in all their 1966 onwards A50/65 rebuilds. Bit of a one size fits all. Not that there is anything wrong with original spec Norton or BSA springs.

jbruney · Oct 17, 2019

Trumpet parts in a Norton..... Kiss the gunner's daughter.... Just funning. It could one day come down to such considerations though, so it does pay to do some research before hand and have the knowledge available.

Torontonian · Oct 18, 2019

Well I ordered it in. Walridge will let customers return things no problemo if fit is an issue or quality.

As an aside , I asked Kibblewhite if there is a cheaper way to ship , or if they have a parts dealer in the G.T.A.

850commando · Oct 18, 2019

Torontonian said:
Well I ordered it in. Walridge will let customers return things no problemo if fit is an issue or quality.

As an aside , I asked Kibblewhite if there is a cheaper way to ship , or if they have a parts dealer in the G.T.A.

i believe that british cycle supply is a vendor KW.

Triumph valve springs for Norton.

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