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Messages - JulianS

Pages: 1 ... 34 35 [36] 37 38 ... 175
526
Singles / Re: Oil leak into outer timing case
« on: 25 January, 2021, 12:31:31 »
The inlet should be top left of the inner cover near the cable grommet. Explore with a length of wire and it should be revealed.

527
Singles / Re: Oil leak into outer timing case
« on: 25 January, 2021, 12:15:35 »
For the engine breather outlet check the lug where the clutch cable fits, I would expect an outlet there, usually would have a tube attached.

The outer cover should have an oil seal for the kickstart shaft to assist keeping the gearbox oil in.

528
Twins / Re: BSA Twin Restoration
« on: 23 January, 2021, 10:53:03 »
Parts books essential but they do not cover mid season changes ammendments and corrections which happened after the book was printed. These updates came on parts service bulletins, many of which can be found on the Club website.

The original BSA supplied parts books used a fine print , much clearer than many of the copies offered for sale today.

The W C Haycraft Book of the BSA Twins is a care and maintenance manual, with some illustrations, my copy indicates it was first published in 1960, second edition in 1963 with several reprints and minor ammendments in 1969. The later copies are not securely bound and often loose pages.

The other contemporary book was "BSA Twin Motor Cycles" by D W Munro. Simiar size to Haycraft book. Some developement history some maintenance. Author was the BSA factory technical manager.

529
Singles / Re: C15 SS80 carburettor
« on: 22 January, 2021, 10:51:55 »
The concentric carb was introduced for the 1967 season so not an original fitment for the SS80. But often used as replacements for the monobloc.

530
Twins / Re: Carburettor 1961 golden Flash
« on: 22 January, 2021, 10:06:57 »
The 1960 on Golden Flash was specified as 389/45, which is 1 1/8 inch bore.

The 376 was used up to 1959 season then the inlet in the head was opened slightly from 1 1/16 to 1 1/8 inch for 1960 and it got a bigger bore carb. (the 376 body only went to 1 1/16 inch bore, the 389 series had a bigger body and took from 1 1/8 bore up to 1 3/16)

The original 389/45 had a plain intake which did not have a thread on the end  that plain end was to retain a rubber conection to the air filter body. So you could not screw a bell mouth or filter onto it. The original carbs were stamped with the specification on the  mounting flange.

Below from the 1955-61 Amal settings list.

If in doubt phone and speak to the supplier Amal or Hitchcocks or Surrey Cycle being some.

531
Bantam / Re: D1 frame
« on: 21 January, 2021, 10:50:13 »
Should be straight. See the diagrams below.

Probably had a shunt.

532
Singles / Re: Magneto pinion nut
« on: 20 January, 2021, 20:02:54 »
The Feked nuts are long or short shouldered type, which is what you need.

Not to be confused with the auto advance unit sleeve nut which you can see at the bottom of the photo.

533
Singles / Re: Magneto pinion nut
« on: 20 January, 2021, 18:31:23 »
Short sleeve and long sleeve nuts usually refer to the central nut which goes into the automatic advance pinion for twin magnetos.

Bess has identified the nut you need which was also used on twin magnetos with manual advance. Image is from the A10 parts book. Ignore the leading number 111 which is just a price code used by the factory.

534
Twins / Re: Petrol tank color scheme, chrome /paint ?
« on: 20 January, 2021, 15:20:35 »
Should have said "...were not intended for sidecar use............."

535
Twins / Re: Petrol tank color scheme, chrome /paint ?
« on: 20 January, 2021, 11:46:50 »
The plungers were kept in the list until 1957 for sidecar use. The swinging arm frames were intended for sidecar use until the 1958 models which were fitted with the sidecar mounting bracket in the pillion loop.

The first A10 swingng arm models left the factory in late 1953.

536
Twins / Re: A50CC restoration
« on: 18 January, 2021, 17:37:32 »
Yes that is usual for you bike.

It was introduced around November 1962 from engine A50 396 and A65 1307 to facilitate removal and replacement of the clutch cable, according to te service bulletins. Earlier machine could be modified

537
Twins / Re: Part number and other info for A 10 Auto advance
« on: 18 January, 2021, 15:09:46 »
Lucas part 47503.

This only fits A7 A10 and Ariel Huntmaster

44 teeth.

Below from Lucas catalogue.

538
Singles / Re: Lower yoke.
« on: 18 January, 2021, 10:12:26 »
This is the service bulletin which explains.

539
Twins / Re: Road Rocket Ignition Barrel
« on: 18 January, 2021, 10:07:17 »
It is the steering lock.

The lock is a complete unit. If you remove it from the top yoke by taking out the grub screw and pushing or tappng the unit upwards it will come out.

If it is an original BSA item there is usually a 2 digit number stamped on the body which is the key number for a Union/Wilmot Breeden EJR series key. Replacement newly cut keys are commonly available on ebay but buy one for a motorcycle steering lock not the EJR car key series which are cut on a reverse blank.

Lock in photo has a new key.

Pattern replacement locks also available from many dealers.


540
Twins / Re: A65 primary chain cover
« on: 16 January, 2021, 16:08:22 »
You need to attach a degree disc to the crankshaft and make a pointer.

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