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British Bikes / Re: 1952 Norton ES2 spark plug
« on: July 19, 2018, 04:36:10 PM »I agree 5/8" does seem a lot - it equates to 42 degrees or so but I'll try it at that and see how it goes. Possibly after breaking my ankle......
1947-58 ES2 is 0.375" (3/8") according to Roy Bacon's Norton Singles book.
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British Bikes / Re: Smiths speedo as fitted to 73 Bonnie.
« on: July 08, 2018, 10:35:48 PM »
The trip knobs don't always fit back as tight afterwards, which seems to be why they are often missing.
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British Bikes / Re: Smiths speedo as fitted to 73 Bonnie.
« on: July 08, 2018, 08:11:35 PM »
The trip knob should pull out, however, they're often stuck due to corrosion.
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British Bikes / Re: b.s.a.c15 gearchange spring anchor bolt
« on: June 14, 2018, 10:48:07 AM »
As you have the bolt then why not measure the threads per inch (TPI)?
1964 sounds a little early for it to be UNF so what is the TPI of this 5/16" bolt?
1964 sounds a little early for it to be UNF so what is the TPI of this 5/16" bolt?
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British Bikes / Re: what is the purple oil in my BSA RGS
« on: June 09, 2018, 06:29:32 PM »So this being the case, I should be OK to drain, filter clean and fill with some proper mineral oil?
I expect so although a modern synthetic is probably the better choice.
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British Bikes / Re: what is the purple oil in my BSA RGS
« on: June 09, 2018, 06:15:16 PM »the existing oil is a very bright blue/purple, quite sticky oil. I haven't come across this before. Does anyone have any ideas what this oil might be
http://www.royalpurpleconsumer.com/
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Identify these bikes! / Re: Identify Grandad's 1920s Motorcycle
« on: June 04, 2018, 01:51:57 PM »Is the vertical cylinder behind the headlamp something to do with powering the headlamp?
Yes.
https://en.wikipedia.org/wiki/Carbide_lamp
https://uwaterloo.ca/wat-on-earth/news/carbide-willson-was-great-canadian-inventor
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British Bikes / Re: T 100 490cc 1968
« on: May 18, 2018, 05:29:29 PM »well, I was there, I know what I did, you were not and don't know.
so lets leave it at that?
I don't doubt you were there. As for the rest of it, yes I think we should leave it at that.
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British Bikes / Re: T 100 490cc 1968
« on: May 18, 2018, 01:57:36 PM »Be that as it may, I had to change damn near every Met Police Saint gearbox to needle rollers either 68 or 69.
I don't know what you could have changed as Unit 650s had layshaft needle rollers from 1963 and the other gearbox bushes would have been almost impossible to change to needle rollers (without machining out gears etc.) and bronze bushes continued to be used right to the end of T140 production. Triumph's recommended gearbox oil remained as EP90.
http://www.classic-bike-shop.com/57-4575-bush-3rd-gear-triumph-5-speed-744-p.asp
https://www.triumph-spares.co.uk/layshaft-2nd-gear-bush-5-speed-57-4662
http://www.britishmotorcycleparts.co.nz/57-4663-layshaft-1st-gear-bush-5-speed
https://www.triumph-spares.co.uk/mainshaft-clutch-push-rod-bush-57-3988
As I recall, thrust washers only used with needle rollers, bushes had that flange incorporated in the bush.
Yes, so replaced bronze bushes with needle rollers and bronze thrust washers!
https://www.thunderbirdspares.com/thrust-washer-gearbox-layshafttriumph-1961-83-57-1607-641-p.asp
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British Bikes / Re: T 100 490cc 1968
« on: May 18, 2018, 11:02:26 AM »Around 1968/9 Triumph changed all the bushes in their gearboxes from bronze to needle roller bearings because they were having problems with EP oil corrosion.
Its alleged that EP oils have now got over the corrosion problem.
Triumph certainly didn't stop using bronze bushes in their gearboxes!
Bronze bushes and thrust washers continued to be used in Triumph (T120, T140 etc.) gearboxes. I've never had a problem with any GL4 EP oil and just used whatever brand of EP90 Halfords had on the shelf so they seem to be sulphur stabilised whether it says so or not, but anyone concerned about 'yellow metal' (bronze) damage can buy 'yellow metal safe' EP oil if they wish.
Example:
https://www.classic-oils.net/Millers-EP-Gear-Oil-80W90
Edit: The layshaft bearings were changed to needle rollers, however, this occurred some years before EP oil was specified and not as late as '68/'69 ('63 for T120 etc.).
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British Bikes / Re: T 100 490cc 1968
« on: May 18, 2018, 09:48:46 AM »
In the many years I've used EP oil I've never known it to become "actively corrosive". As with any oil if changed at the normal service interval there shouldn't be a problem [Edit] but use GL4, not GL5.
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British Bikes / Re: T 100 490cc 1968 tax MOT ?
« on: May 18, 2018, 09:41:06 AM »I hope a member can advise me I have a T 100 first registered 21-5-1969 frame No. H65380 engine No.H39492
am I correct in thinking that after 20-5-2018 I no longer need to tax or MOT my bike ? I have just received a letter from DVLA to say my bike must be taxed and MOTd ? or placed on SORN.
Is it insured? If not, then it must be SORNed.
https://www.gov.uk/sorn-statutory-off-road-notification
You need to either tax or SORN it unless the taxation class has been changed to 'Historic'.
Even if Historic, you still have to 'tax' it, however, Historic tax is free.
https://www.gov.uk/historic-vehicles
You are correct about the change in MoT rules from the 20th of this month.
http://www.classicandsportscar.com/news/government-clarifies-position-mot-exemption-modified-classics
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British Bikes / Re: 1970 RE Interceptor 750
« on: May 08, 2018, 02:05:52 PM »
You may be better off buying from Hitchcocks in the UK.
http://accessories.hitchcocksmotorcycles.com/
Or Burton
https://burtonbikebits.net/
http://accessories.hitchcocksmotorcycles.com/
Or Burton
https://burtonbikebits.net/
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British Bikes / Re: Loctite 5990
« on: May 04, 2018, 09:22:01 AM »
I use ordinary clear silicone sealant.
Not even the high-temperature silicone.
Not even the high-temperature silicone.