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Messages - JulianS

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Twins / Re: Steering lock removal 1972 Thunderbolt
« on: 10 August, 2017, 15:39:37 »
The parts book shows what it describes as a sealing washer over the grub screw.

Twins / Re: Clutch cable ferrule and gearbox abutment puzzle
« on: 09 August, 2017, 11:56:00 »
Super photos!

Singles / Re: B31 Front wheel
« on: 09 August, 2017, 10:03:10 »

I think your wheel is a standard 8 inch one, your photos first 2 and the last photo which is from the service sheets.


Singles / Re: B31 Front wheel
« on: 08 August, 2017, 21:21:14 »
Sent you a PM

Twins / Re: Clutch cable ferrule and gearbox abutment puzzle
« on: 08 August, 2017, 21:19:46 »
The clutch was changed from 6 to 4 spring during 1960, from engine DA10 13298 see the parts service bulletin below. So the 6 spring is likely original to your bike.

Handlebar adjusters are right for a GA7 frame.

You could consider some simple mods to keep the bar end adjusters - first you could buy the raw materials and make some cables - if you look at the clutch lever on the gearbox that nipple on your new cable was never going to fit properly, just the wrong shape. Make your own they are always the correct length and fitted with correct fittings, you could fit adjusters at both ends of the cable.

Or you could modify your gearbox inner cover - bore the threaded hole to take the ferrule.

And you could change the front brake cable stop to the unthreaded type. Part 42 5885 is the unthreaded one.

It would not be suprising to find a mix match of parts on a bike after all tose years and not knowing whohas done what and when.

Singles / Re: C15 timing
« on: 08 August, 2017, 18:21:33 »
I would just tighten the bolt.

Twins / Re: Clutch cable ferrule and gearbox abutment puzzle
« on: 08 August, 2017, 16:25:15 »
That is a nasty cable - the nipple should fit snuggly in the clutch lever. Looks very poor quality.

But you gearbox inner cover is for FA7 frames and earlier with an adjuster at the gearbox end but not at the handle bar, the hole is threaded 1/4 BSF for screw adjuster. So cable wrong for you gearbox cover. You need the 1959 and earlier cable to go with your gearbox. But the inner might be too short to go with the adjuster at the bar end as well as the gearbox end.

The GA7 frame inner cover was bored to take the ferule on the end of your cable, was not threaded and did not have the slot. This cable was for use with handle bar end adjuster.

Photo shows the gearbox with adjuster.

Twins / Re: A65 fuel tank
« on: 08 August, 2017, 16:12:03 »
If, when you look into the centre hole in the tank, you see a cup then it takes a small rubber which sits in it.

If you see a plain tube then it takes the later C15 type large diameter rubber.

Photo shows late C15 type left and A65/A10 type right.

Twins / Re: BTH magneto fitted to my A10
« on: 08 August, 2017, 09:47:33 »
Looks like a very neat mounting with coils under the battery I had wondered about a good place for them.

Thanks for posting the photos.

Twins / Re: A7 points gap
« on: 08 August, 2017, 09:25:31 »
0.010 - 0.012 inches. Check on both cam lobes and you will probably find they setting is slightly different on each. Most are like that and Lucas allowed up tp 0.003 inch variation between them.

Singles / Re: B31 Front wheel
« on: 08 August, 2017, 09:05:11 »
If you have windows 10 you may have "paint" program.

Right click on photo, select option "open with" then  "Paint" then select "resize". This allows you to reduce size - try "pixels" and reduce number in box below.

Twins / Re: Another tank question.
« on: 07 August, 2017, 18:51:05 »
Does it look like this Thunderbolt tank?

It is from the 1972 brochure.

Its the 4 gallon tank.

Singles / Re: B31 Front wheel
« on: 07 August, 2017, 17:36:25 »
Could you post some photos?

Twins / Re: Fuel tank
« on: 07 August, 2017, 16:44:00 »
Yes it can get confusing. I think the UK brochure is showing the US tank.

The first photo is from the 1969 US brochure showing a tank capacity of 3 1/4 US galloms which is 2.7 UK gallons.

Others from 1969 parts catalogue.

Twins / Re: Fuel tank
« on: 07 August, 2017, 15:07:25 »
Contemporary photos of the 1969 Lightning show rubber knee grips on the 4 gallon tank - the 1969 parts book shows the same, brackets attached to tank with screws for the knee grips to mount on.

There was also a mid season change of filler cap, from a hinged one secured to the tank with a rivet to a round bayonet fitting type. This is detailed in a parts service bulletin issued in February 1969 - G56.

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