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Topics - Epreon

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British Bikes / Choice of tyre brand and size for 1970 Tiumph 650cc twin

« on: April 13, 2024, 07:19:52 PM »

I would be extremely grateful for some advice regarding the choice of tyre brand and size for the 1970 pre-oil in frame Triumph 650cc twin that I have been working on for the past 8 years.

In the 80s I was pleased with the performance of the tyres then fitted to the bike, it was run on:
Front - Avon Roadrunner 19", WM2 rim size 50/90 H19 3.6
Rear - Avon Roadrunner 18", WM2 rim size 50/90 H18 4.25

I have fitted new stainless rims.
Front 19" WM2 MB11
Rear 18" WM3 MB10

It might be possible to fit the same size tyres (as before) on the new rims if they are available in those sizes.

I would like to go for the same sized tyres as fitted before and no wider to retain the same feel as before. I want to ride the bike, it's not totally original or for show and I do not mind if my tyres look modern but grip well. I am not interested in economy covers.

Would anyone reading this forum know what might be the best tyre brand and size combination for my bike? I would appreciate comments about my dilemma.

British Bikes / Triumph crankcase engine stamping

« on: April 04, 2023, 06:56:06 PM »

A while ago, I bought a replacement engine for my classic Triumph motorbike from a reputable shop but there is no number on the engine crankcase.

I have been advised to obtain a Triumph engine stamp with which I could stamp the crankcase before adding the letters and numbers. I have not been able to find such a stamp on ebay or anywhere else and would appreciate if anyone could point me in the right direction to get a Triumph emblem stamp.

Secondly, if I cannot get a Triumph stamp, then I will have to stamp the crankcase with the appropriate letters and numbers without any under-stamping with the Triumph emblem.

My Haynes manual has a photograph of the engine number which has no under-stamping without any Triumph logo stamping whatsoever - this being a T120 engine number DU78964.

Does anyone know if there are many examples of classic Triumphs that didn't have the logo stamped on the crankcase under the numbers and letters as in above Haynes manual? Was this the norm in other words to not have a Triumph logo under-stamp?

Thanks

British Bikes / Triumph front wheel offset

« on: July 31, 2022, 06:06:02 PM »

I have rebuilt the front wheel on my 1970 pre-oil in frame Triumph TR6 650 twin with new rim and spokes.

The wheel offset is supposed to be zero with the wheel sitting centrally between the forks and with the centre of the front rim in line with the axis of the steering head.

Having fitted the forks I find that the clearance between the wheel and forks differs by an average of 3.2mm between the left and right hand fork sides.

I would be greatful if anyone could let me know whether I have to correct this fault or is the small amount of out of alignment in this case acceptable?

British Bikes / Part Suppliers for 1969 Meriden Triumph TR6

« on: June 12, 2020, 05:52:54 PM »

Has anyone got any suggestions for good online suppliers for sourcing parts to finish my TR6 1969?

Any suggestions for cleaning oil tank for re-use?

Thanks.

British Bikes / Sludge trap 650 twin

« on: May 24, 2017, 03:54:19 PM »

I have a Triumph 650 twin c1970 and want to clean out the sludge trap in the crankshaft which is on the timing side of the crank. How do I separate the crankshaft from the right hand crankcase?