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Topics - hoogerbooger

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Singles / B40 star best set up for wrong carburetor
« on: 12 November, 2017, 18:55:53 »
My 1965 B40 has a Amal 627 (428) concentric carb. 20 years ago Dave Smith of BSAOC said its from a Trident but is ok and recommended the set up as:

Main Jet: 140
Pilot jet: 20
Slide 3
Needle position 2
Needle jet .106

( I don't actually know how its set up)

I notice that the concentric that was fitted on some later B40's was a 626. So was Dave Smith right that my 627 as set up above should be fine. ?

I am presuming after 18 years of doing nothing in a garage I'll probably need to check/clean/service it. I did take it apart once but only checked if for crud & cleaned jets ( oh yes then had to emery the flange flat that my make over tightened).

I will see if I can the bike going, but would be useful to know if the 627 should be ok.


Singles / B40 Star air filter - what's the best option now
« on: 08 November, 2017, 21:21:30 »
I have no air filter on my B40 star and on googling you don't seem to be able to get a copy of the original filter unit that goes inside the battery compartment/behind the air filter mounting plate.

The carb is an amal 627 and there's only about 15-20mm between it and the air filter mounting plate/hole into the battery compartment.

Anyone able to advise on my best options for an air filter ?

Singles / 1965 B40 Star battery & ignition
« on: 03 November, 2017, 20:46:43 »

I have a 1965 B40 star that's been sitting in the garage for 18 years and I now want to get on the road.

The battery had died and was binned. On a quick search of web sites they seem to suggest it should be 12 v ? But I am absolutely sure it was a 6v  as when I had it running I had to get a 6V charger.  So were 1965 stars 6V? 

Also I notice that there are 6V electronic ignition kits.  Any advice on the best for a B40 star ?


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