Bsa b44 enduro

Here you can talk about all kind of TECH for the B50 B44 B25 And Other BSA unit Singles

Moderator: minetymenace

Post Reply
Brickie
>10
>10
Posts: 13
Joined: Tue Nov 15, 2016 9:53 pm
Location: Between Leeds & Skipton Yorkshire
Has thanked: 0
Been thanked: 0
Flag: England

Bsa b44 enduro

Post by Brickie » Mon Aug 17, 2020 9:38 pm

Hello everyone I have a 1966 441cc victor enduro, engine re built just before I got it problem is an oil leak between 1st &2nd barrel fins at the front left side .
Any help appreciated
Thanks Brickie

Jeff K
>1300
>1300
Posts: 1350
Joined: Sun Jul 13, 2014 12:30 pm
Location: Bay City, Michigan USA
Has thanked: 54 times
Been thanked: 23 times
Flag: United States of America

Re: Bsa b44 enduro

Post by Jeff K » Tue Aug 18, 2020 2:53 pm

Clean it off with carburetor cleaner/spray, let dry and then blow some baby powder/talc on the area and start it up. Short ride and you should be able to pin point the leak. Many times it is seeping from some where else and where you see it , is where it has settled at.
Jeff

Brickie
>10
>10
Posts: 13
Joined: Tue Nov 15, 2016 9:53 pm
Location: Between Leeds & Skipton Yorkshire
Has thanked: 0
Been thanked: 0
Flag: England

Re: Bsa b44 enduro

Post by Brickie » Wed Aug 19, 2020 7:39 pm

Thanks JeffK I will try that this weekend
Brickie

User avatar
Ian Hingley
>1400
>1400
Posts: 2039
Joined: Sat Jun 30, 2007 2:50 pm
Location: Bristol, UK
Has thanked: 18 times
Been thanked: 13 times
Flag: Sao Tome & Principe

Re: Bsa b44 enduro

Post by Ian Hingley » Fri Aug 21, 2020 11:41 pm

My 66 B44 Enduro did exactly the same when I first got it running. In fact I think it was the subject of my first of many posts to this forum over the years.

The issue is worn rings and/or worn piston and/or worn bore.

The bottom of the crankcase studs are not in a blind hole on a B44 as they would be on the smaller capacity bikes. The escape of the combustion gases past the piston pressurises the crankcases a bit and forces oil past the threads in the bottom of the studs. The studs are then exposed to the atmosphere about two or three fins up. Hence you get bizarre oil leak from somewhere there shouldn't be any oil!

So the remedy is a good rebore, good piston and a good ring pack. Mark Cook at PES/CCM Britain did my rebore. I change my oil frequently, but have never had to top the oil up between changes. Makes a difference.

Cheers

Ian b44icon IHOSMILE
66 BSA Victor Enduro, 72 BSA Lightning, 62 BSA B40 trials, 2015 Truimph Street Twin, 89 H*nda Bros 650, 2000 Aprilia Moto 6.5 Starck

Brickie
>10
>10
Posts: 13
Joined: Tue Nov 15, 2016 9:53 pm
Location: Between Leeds & Skipton Yorkshire
Has thanked: 0
Been thanked: 0
Flag: England

Re: Bsa b44 enduro

Post by Brickie » Sat Aug 22, 2020 7:38 pm

Thanks Ian ,I think you have nailed it in hindsight the plug looks a bit oily so maybe all part of the problem
Regards Brickie

Jeff K
>1300
>1300
Posts: 1350
Joined: Sun Jul 13, 2014 12:30 pm
Location: Bay City, Michigan USA
Has thanked: 54 times
Been thanked: 23 times
Flag: United States of America

Re: Bsa b44 enduro

Post by Jeff K » Sun Aug 23, 2020 1:53 am

Blue Loctite works wonders on studs. Holds and seals. plus in comes apart with hand tools.
Jeff

Brickie
>10
>10
Posts: 13
Joined: Tue Nov 15, 2016 9:53 pm
Location: Between Leeds & Skipton Yorkshire
Has thanked: 0
Been thanked: 0
Flag: England

Re: Bsa b44 enduro

Post by Brickie » Mon Aug 24, 2020 6:53 pm

Thanks Jeff I will get some for the rebuild
Brickie

Post Reply