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Messages - Rex

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1051
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 31, 2013, 09:58:35 AM »
Good that you've got it cracked. I've never worried too much about modifying components in this way, after all, it's better to be riding it than obsessing over not having the correct 1962 squiggle washer. Mixing and matching 50+ year old parts can be fraught at the best of times anyway, and that's with a mass-produced bike too.

1052
British Bikes / Re: old push bikes love em or hate em
« on: August 29, 2013, 10:12:39 PM »
Is that a postie bike? Every one I've seen has been the dropped cross-bar Pashleys in red.

1053
British Bikes / Re: Norman Nippy
« on: August 29, 2013, 10:09:16 PM »
Can't tell you the exact year but my first bike (bought with my paper round money) was a 1961 Nippy and that had a 3K engine and S/A rear suspension. It was a 1961 and apparently one of the last made before production ceased. The earlier ones had a rigid (?) rear end and some had a Sachs engine too, but both types were earlier than mine.

1054
British Bikes / Re: 1957 model 88 basket case value?
« on: August 29, 2013, 12:51:35 PM »
Didn't the 6V system have alternator coils switched in or out by the light switch? It may be crude, but it's still regulation.  Agreed, the battery acts as a reliable voltage regulator if the system is well designed and load matches demand. That nice Mr Honda has been doing it for years on the cheap end of the ranges.

1055
British Bikes / Re: old push bikes love em or hate em
« on: August 24, 2013, 09:55:48 PM »
My main hobby is bicycles. So easy to work on. I keep collecting them and sell a few from time to time (40+ in the last 12 months).

Are you the bloke who sells the bikes in the small ads in the back of CMC etc?  IoW or somewhere like that?

1056
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 19, 2013, 01:06:57 PM »
But surely any old stock of Imperial bushes will still be marked with those old Imperial sizes, so why would they need to convert in this way?
Better to go to someone like Bearing Boys, at least they recognise that there won't be direct and suitable metric equivalents for all (if any) Imperial sizes and so stock both ranges.

http://www.bearingboys.co.uk/Oilite__Bearing_Bushes_-1011-c

1057
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 17, 2013, 09:58:53 PM »
 author=antoni link=topic=4694.msg18592#msg18592 date=1376488990]
I don't see anything wrong with mixing metric and non-metric if it's convenient and clear.

Been giving that one some thought, and I can't envisage any situation where mixing units would be more "convenient" than just following normal convention and sticking to one type or the other.  :-\

The works warehouse floor is marked with metres and cubits.

Any particular reason why that warehouse is using units which mean absolutely nothing to 99.9% of the general population? ???

1058
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 14, 2013, 04:37:52 PM »
I'm not using it, but quoting it from the previous posts.

It's just daft to mix units like this. It's like the DiYer who asks the timber merchant for 2 metres of 4X2, or the nut and bolt stockist for M6    by 2" set screws usually  to much hilarity from the staff... ie it's laughable in any mathematical or engineering context.

More seriously Triumph didn't make 1/4 X 6mm rollers, they made 0.250 x 0.234 rollers. Nothing to do with 6mm, ever.

1059
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 14, 2013, 02:04:51 PM »

[
Yes. My quarter-wide rollers are currently improving the symptom very slightly, but I want to fix the problem.

All those roller are 1/4" wide (diameter) but genuine Triumph ones are 17 thou shorter in length. Anyone actually asking for 1/4 X 6mm rollers should raise a hearty laugh at the suppliers anyway... ;)


1060
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 12, 2013, 08:39:47 AM »
The bottom flange of that centre looks different to the usual Triumph part, so maybe that's an after-market piece with the incorrect taper and/or too thick a bottom flange and allowing the centre to sit too far onto the mainshaft?
If it sits too far on (as also happens if you try and fit a 650 part here) the taper doesn't grab before the flange hits the alloy casing, and although the uninitiated carry on and whang on the clutch nut hoping it  will all be secure and work OK, it doesn't.
Maybe the bloke who originally built it (and hoped the clutch would just sort itself out) didn't understand that centre was located by the shaft's taper?  A loose taper would lead to rock too.

1061
British Bikes / Re: fast ariel 500
« on: August 07, 2013, 01:29:06 PM »
RH....Red Hunter?

1062
British Bikes / Re: triumph twenty one top end questions .
« on: August 06, 2013, 10:51:34 AM »

ive been working on a project , a 1972 triumph daytona with a triumph twenty one engine . the bike had not been together in a decade or two . the engine smoked a lot and upon inspection there was too much wear in the valve guides . in the box of parts i found another head which looks the same except the valves are larger diameter ,everything else measures up the same , it is in better condition so i used it .the newer head had 73b stamped on it [/i].

The early 350s had smaller valves (can't recall if it was inlet or exhaust) but they soon went to the later larger 5TA type and then larger again for the T90. More clatter indicates worn parts or incorrect rocker gaps. Checked them since you fitted this head?

on another note ... does anyone know where i might get a parts diagram or e manual for a pre unit t100 ?

Google it, there's loads on the Net, on Bruce Main-Smith for a paper copy.

and lastly .. i am building a triton with a 58 dommie frame . if you had a choice of a t100 pre unit engine or a 1962 trophy 650 engine for the dommie frame which would you pick ?
 
Preunit, although a 650 preunit would be the ideal one to have.

1063
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 06, 2013, 10:44:30 AM »
If Dunboyne has the original 3TA primary chaincase (which I think he said he did) the problem could be that that clutch basket looks to be the later deeper one, while the earlier 350s had a 4 (?) plate shallower basket, so the rubbing could be clearance issues rather than the actual basket rocking.

1064
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: August 05, 2013, 10:27:19 PM »
There's a problem here then, as Triumph only fitted 20 rollers....

1065
British Bikes / Re: Mystery front wheel?
« on: August 03, 2013, 05:36:50 PM »
I don't reckon that hole is a drain hole, because if it was it would put the anchor in a really strange position. More like there's no shoes on the plate and the brake arm is flapping around loose and been pictured too high up. That hole is probably the lower cable stop mounting, whether from the maker or someone's little mod, who knows?

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