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Messages - JulianS

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Twins / Re: Steering head adjustment 1962 A65 Star
« on: 24 March, 2018, 19:43:30 »
Suggest also slacken the bottom yoke pinch bolts before adjusting, also ensure that the forks pivot freely on the bearing without any feeling of roughness or lumpiness which would indicate overtightening or wear and/or lack of grease. These bearings are often neglected.

Twins / Re: Pre-unit gearbox sprocket nut
« on: 24 March, 2018, 09:37:35 »
I fitted an SRM sprocket nut to my A10 some years back. The thread form was perfect, however the seal was quite tight on the gearshaft when first assembled. A worthwhile modification, stopping the oil seeping along the sleeve gear bshes and allowing proper tightening ofthe nut.

If you are having a problem with the nut suggest phone SRM and discuss.

Twins / Re: Road Rocket
« on: 23 March, 2018, 09:13:37 »
Frame number is 1960, engine number is 1963 season (from September 1962), either Super Rocket or Rocket Gold Star. It would be worth getting a dating certificate from the BSAOC which would identify which model, to which dealer and when supplied.

Road Rockets were made 1954-1957 and Super Rocket 1957-1963.

Pre War / Re: Blue Star rocker lubrication
« on: 21 March, 2018, 22:31:32 »
Below from Pitmans Book of BSA 1935 edition.

Singles / Re: Smiths speedo
« on: 21 March, 2018, 19:48:12 »
Below is from the 1947 BSA parts book.

Twins / Re: Plunger A10 nacelle instruments
« on: 19 March, 2018, 22:30:03 »
With the circlip out it should push out but it will be a tight fit.

Twins / Re: Plunger A10 nacelle instruments
« on: 19 March, 2018, 20:42:56 »
To clarify - the circlip prises out from underneath.

Twins / Re: Plunger A10 nacelle instruments
« on: 19 March, 2018, 18:57:25 »
These switches are retained by a wire circlip underneath. They usually prise out.

First photo shows the circlip in position indicated by the arrow.

Second photo shows the circlip.

Singles / Re: Bsa b31 Valve and Guide
« on: 19 March, 2018, 13:50:42 »
Suggest check combustion chamber for oil. If bike has new bore/rings/piston it will need time form them to properly bed in.

Singles / Re: Bsa b31 Valve and Guide
« on: 19 March, 2018, 11:53:08 »
Could be oil coming from combustion chamber to exhaust valve, due to wear in bore or poor ring bedding in or excess oil in sump.

Could be poor guide to head fit or scored guide or scored guide hole in head.

Sometimes new guides and valves have too much clearance due to poor manufacuring tolerences.

Was the problem there before the new parts were fitted?

Singles / Re: Petrol tank removal
« on: 18 March, 2018, 22:44:30 »
One  either side of the rubber, one either side of frame bracket plus a spring washer under the nut is how I read the books.

Singles / Re: Petrol tank removal
« on: 18 March, 2018, 19:56:42 »
Be prepared to fettle the parts to fit your bike. New parts often fail to fit as well as we would wish them to.

The below diagram, which shows the earliery tank fixing method does show the position of the washer 29 5655 - which is shown in AJWDThumpers illustration- as being over the bolt but under the frame bracket.

Twins / Re: A65 Cylinder head
« on: 18 March, 2018, 18:27:43 »
Mike - You may be thinking of these bulletins.

Singles / Re: Petrol tank removal
« on: 16 March, 2018, 16:14:07 »
Phil you have the wrong rubber.

Singles / Re: Petrol tank removal
« on: 15 March, 2018, 18:30:40 »
There needs to be a larger diameter plain washer between the nut and the rubber so that the rubber expands in diameter and gripsmthe tank when nut tightened.

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