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Messages - L.A.B.

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1
Japanese Bikes / Re: Registering a bike as a classic
« on: August 20, 2023, 10:45:25 AM »
I have got to the bottom of it.
Yes the bike has to be 40 years old but it can't be classified as a classic until the first January after the bikes 40th birthday. In my case the bike will 40 years and 4 month old.

You have to wait until April to register it as Historic tax class.

https://www.hagerty.co.uk/articles/maintenance-and-gear/how-to-apply-for-road-tax-and-mot-exemption-for-a-historic-classic-car/

"Road Tax exemption
Unlike the MOT exemption, getting an exemption from paying road tax doesn’t happen straight after your vehicle turns 40. Instead, you have to wait for the first day of April, and then as long as your car was registered 40 years before the first of January you can apply for road tax exemption from April.
"

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1163655/inf34-taxing-historic-vehicles.pdf

It can't be done online but just take you insurance, log book, pictures to show that it. has not been drastically altered to the Post Office and they do it there and then.

Proof of insurance is now only required in Northen Ireland. You will however need to fill out form V112 unless you continue to have the vehicle MOT'd.

"This requires a change to the V5 registration document, so you will need to take the V5 and proof of MOT or exemption (the V112 form) along to a Post Office and request the vehicle class to be changed [.........] to Historic. In Northern Ireland you will also need to present proof of insurance to make the change."

And you shouldn't need to show photos as PO counter staff aren't going to know what they are looking at, plus some changes may not be visible in pictures.

I've done this three times and never needed to show any pictures.
 

2
British Bikes / Re: Carb leak
« on: August 10, 2022, 12:00:24 AM »
Are they original hollow 'white' (or brownish) plastic floats or the later black and metal StayUp type?

Have you fitted the later 'waterproof' extended ticklers?
https://www.classicbritishspares.com/products/amal-concentric-long-extended-tickler-conversion-kit-622-172-triumph-bsa-norton

If the hollow plastic floats, shake them or hold them up to the light to check fuel hasn't got inside. 
If the StayUp type then check the float needle slot for rough edges and if there are then carefully file or sand them off.
Polishing the float pins if they aren't new could help to stop them from sticking also check the floats aren't catching on the float bowl gasket in the area shown below if so then trim the gaskets but only the minimum amount necessary for them to clear the float.




 
 

3
British Bikes / Re: Triumph front wheel offset
« on: July 31, 2022, 08:33:11 PM »


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.

As it differs by around 3.2mm then the rim is offset approximately 1.6mm which is near enough but as you built the wheel then why not move the rim 1.6mm or as near as you can get it?

4
British Bikes / Re: 1973 Bonneville carb adjustment?
« on: July 24, 2022, 05:57:42 PM »

Sounds like a blocked pilot jet (pilot bush).
https://amalcarb.co.uk/rebuilding-mark-1-concentric-carburetter
"Pilot Circuit"

https://www.ntnoa.org/pdf/Bushmans%20Carb%20Tuning%20Secrets.pdf

If so then you need to make a 0.016" (drill bit/guitar string) tool to carefully clean it.



5
British Bikes / Re: T 100 68 carb/starting problem
« on: November 30, 2021, 10:19:29 AM »
I think maybe just a small amount of debris was restricting the airways even though this is a new carb

It's not unknown for a new carb to still have some debris in it, however, modern fuel also blocks the pilot bush if the bike isn't started for a couple of weeks when fuel has been left in the carbs so I occasionally have to clear a pilot bush (see Bushman's link, below).

http://www.bmoc.ca/Tech%20Info/Bushmans%20Carb%20Tuning%20Update%202015.pdf
 

6
British Bikes / Re: T 100 68 carb/starting problem
« on: November 29, 2021, 09:33:46 PM »
I was being ironic, hence the  ;)

Glad you said so as it made no sense to me, ironic or otherwise.

7
British Bikes / Re: T 100 68 carb/starting problem
« on: November 29, 2021, 06:13:25 PM »
Should be below the main jet ;) and normally a 106.

The needle jet is above the main jet.

8
British Bikes / Re: T 100 68 carb/starting problem
« on: November 28, 2021, 04:41:36 PM »
my carb has  an actual pilot jet came with the 108 size purchased from a store I have used for many years with no problems

The 626/300 (non-Premier Mk1) has a pilot bush, therefore, does not require a screw-in pilot jet?

http://amalcarb.co.uk/rh-26mm-4-stroke-mk-i-carburettor.html
"
Details for RH 26mm 4 Stroke MK I Carburettor

This carburettor is built to a standard specification which provides approximate settings for this bore size and carburettor type. Ideal for anyone who wants to tune their machine themselves.

Comes fitted as standard with:

3 Cutaway Slide

160 Main Jet

106 Needle Jet

Pilot Bush

"
http://amalcarb.co.uk/rebuilding-mark-1-concentric-carburetter
 "
Pilot Circuit

Mark 1 Concentrics are equipped with two types of pilot jets. '2 Strokes' use a removable pilot jet which should be replaced if it is damaged or shows signs of oxidisation. '4 Strokes' generally use a pressed in bush pilot jet in the gallery behind the pilot air screw.

"


9
British Bikes / Re: T 100 68 carb/starting problem
« on: November 28, 2021, 11:16:32 AM »
A 626/300 (non-Premier) has the standard fixed pilot bush.
http://amalcarb.co.uk/rh-26mm-4-stroke-mk-i-carburettor.html

Do you mean 108 needle jet? The original '68 T100(C?) carb (626/8?) and generic 626/300 would have a 106 needle jet? 

10
British Bikes / Re: Stud Thread size
« on: October 09, 2021, 04:09:18 PM »
Points assembly pillar bolts are usually 2BA but I can't find a part number for them so what is the diameter and TPI?

11
British Bikes / Re: Q: BSA A65 L - Cylinder Barrel Correct Part #
« on: July 27, 2021, 07:44:00 PM »

According to my parts book the barrels are part # 71-1464.  When I look at the actual seized barrels, they appear to be Part # 71-1033.

Numbers on castings are often the 'casting' or 'foundry' number and not the actual 'part' number and although I don't have a list of casting numbers casting 71-1033 is probably 71-1464.


The engine VIN on the case is XE 02985 A65L, which I think would be a December 1971.

'X' denotes the month of manufacture  (December), however, 'E' denotes model year (1971) which isn't necessarily the calendar year in which the bike was built as production of new the 'year' models began around August of the preceding year so XE would be a 1971 model built December 1970.


12
British Bikes / Re: 1973 Bonneville Ignition Switch
« on: June 02, 2021, 09:59:40 PM »
It has the wrong front fork and some other missing pieces, so my question is; If it had an ignition switch, where was it mounted when it left the factory?

In the left-hand headlamp bracket. The fork being wrong probably explains why it isn't there.

13
British Bikes / Re: 1969 BSA A65L wiring
« on: May 12, 2021, 09:29:29 AM »

I cant find a wiring diagram showing these colours,

Brown and blue are not the original stator wire colours so very likely someone has replaced at least two if not all three wires.

so if someone can tell me how they connect to the rectifier I would be very grateful.

Assuming the green/yellow is correct (which it may or may not be) and that the stator is a three-wire single-phase (RM19 and not a later 3-phase upgrade?)  then for a 12V electrical system, the green/yellow and one of the other two wires (normally green/black) are connected together and then connected to one AC terminal of the (presumably single-phase rectifier?) and the third wire (normally white/green) connected to the other rectifier AC terminal, however, as the colours are wrong then there's no way to identify which is which by the colours.   

Edit: I don't know exactly when the change occurred but I believe a 1969 A65L would normally have had a two-wire RM21 stator. 



14
British Bikes / Re: T 100 68 oil pressure gauge ?
« on: January 28, 2021, 02:08:10 PM »
So there dynamic, appears you're buggered. ;D

Not buggered, it just requires a suitable 3/8 x 26 adaptor/fitting.

15
British Bikes / Re: T 100 68 oil pressure gauge ?
« on: January 28, 2021, 12:35:17 PM »
Assuming the '68 model has an oil pressure switch, that's your starting ppoint.

The oil pressure switch was 1969-on.

A 1968 timing cover should have a blanking plug (E2615/70-2615) with 3/8"x 26 TPI CEI thread.   

https://www.feked.com/triumph-timing-cover-crankcase-plug-pre-unit-650cc-unit-twins-and-tiger-cub-models-1949-68.html


It will either be 1/8 or 1/4 BSP. You'll need a selection of appropriate brass BSP fittings; including a tee piece to refit the pressure switch.

The BSA and Triumph oil pressure switches were never BSP.

Early oil pressure switches/timing covers were tapered thread 1/8" x 27 NPT.

Later this changed to parallel thread 1/8" x 27 NPS

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