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Topics - johnm

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British Bikes / Triumph Tiger 90 Piston Rings / Pushrod Tubes
« on: March 14, 2018, 08:49:23 PM »
Hi All
Hope I can get some help with a query I have on my Tiger 90 350 twin 1964. I am doing a top end rebuild and I need some advice on a few issues.
The parts manual lists two taper compression rings and one oil ring per piston for the T90 and the 3TA lists one plain/one taper and one oil ring per piston. I am having trouble locating the taper rings needed and can only find plain rings, oil rings no problem. Should I just fit the plain rings and forget the taper rings? What's the point/benefit of the taper ring? Is it anything to do with the increased compression of the T90? I may be over thinking this one, but I would like to get it right if I can.
When it comes to the dreaded pushrod tubes and seals should I bed the seals in with any sealant?  Wellseal/Hermetite or similar.
Many thanks for your help, cheers John

British Bikes / Triumph T90 Amal Carb query
« on: February 03, 2016, 07:57:36 PM »
Hi everyone
I hope someone  can help with a carburettor issue I have on a recently purchased 1963 Triumph T90. It is fitted with a different spec carb to the original 376 monobloc.  It is a 625 concentric, similar to the MK1.5 with the choke lever on top, which I  believe is of Spanish origin fitted to Bultaco etc.
I have no contacts as to who fitted this and why. The issue I have is should I leave well alone and maybe just service it?  Should I replace it with an original?  Is a concentric any better than a monobloc?
 I am not too bothered about originality a so I do not have a problem with leaving it in place. It seems to run OK with this setup, but with not owning a 350 twin before I don't know if it would run better with the original.
Any help would be appreciated, I am scratching my head a bit on this.
Cheers  John

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