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b44 primary leak #783843 09/09/19 12:28 pm
Joined: Aug 2001
Posts: 2,803
Richrd Offline OP
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how do I stop the primary oil from being thrown out the ent hole at the rear of the inner primary case? how necessary is this breather?


Rich (last remaining member ThreeMustGetBeers)
"It's not always about going fast. Sometimes it's nice to slow down" (Wendy E.2016)

69 bonney
72 commando
75 commando interstate
06 Suzu..Suzu.. uh appliance
couple of beesas a ducati
and the Snake Bike
and a Honda?
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Re: b44 primary leak [Re: Richrd] #783845 09/09/19 2:03 pm
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Allan Gill Offline
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Same breather as the A65 and not partiually required as long as a blanking bolt is fitted.

Other thing is do the breather inspection caps have holes in?


beerchug
Re: b44 primary leak [Re: Richrd] #783881 09/09/19 10:23 pm
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Richrd Offline OP
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What do you mean by breather inspection tion caps?


Rich (last remaining member ThreeMustGetBeers)
"It's not always about going fast. Sometimes it's nice to slow down" (Wendy E.2016)

69 bonney
72 commando
75 commando interstate
06 Suzu..Suzu.. uh appliance
couple of beesas a ducati
and the Snake Bike
and a Honda?
Re: b44 primary leak [Re: Richrd] #783887 09/10/19 12:33 am
Joined: Sep 2004
Posts: 1,173
gunner Offline
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If this is what I think it is, its not a breather, its a rear chain oiling device, most folk blank this off with a bolt, some silicone or other method.

The B44 has no other breathers and I think Alan means the tappet inspection covers which people sometimes fit with breather tubes.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: b44 primary leak [Re: Richrd] #783888 09/10/19 12:35 am
Joined: Sep 2013
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Q
quinten Offline
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Q
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That hole at the back does provide venting ...but it supposed to leak
Because it's a poorly designed automatic chain oiler .
An engineering idea who time has passed ... block it off .

The primary needs a small amount of venting
So
Blocking it off may just move the leak to the next weakest spot

Depending on the year ...
The primary side cover
may already have these .. on the side
vented inspection caps [Linked Image from bsaunitsingles.com]


https://www.bsaunitsingles.com/item.wws?cpubcode=BSA&sku=70-9800
If not
The Bsa Unit Singles site says they have 40 in stock

Re: b44 primary leak [Re: Richrd] #783892 09/10/19 1:57 am
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Richrd Offline OP
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Thanks, I all be ordering some.


Rich (last remaining member ThreeMustGetBeers)
"It's not always about going fast. Sometimes it's nice to slow down" (Wendy E.2016)

69 bonney
72 commando
75 commando interstate
06 Suzu..Suzu.. uh appliance
couple of beesas a ducati
and the Snake Bike
and a Honda?
Re: b44 primary leak [Re: quinten] #783899 09/10/19 9:05 am
Joined: May 2013
Posts: 6,143
Allan Gill Offline
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Originally Posted by quinten
That hole at the back does provide venting ...but it supposed to leak
Because it's a poorly designed automatic chain oiler .
An engineering idea who time has passed ... block it off .

The primary needs a small amount of venting
So
Blocking it off may just move the leak to the next weakest spot

Depending on the year ...
The primary side cover
may already have these .. on the side
vented inspection caps [Linked Image from bsaunitsingles.com]


https://www.bsaunitsingles.com/item.wws?cpubcode=BSA&sku=70-9800
If not
The Bsa Unit Singles site says they have 40 in stock




Thanks for the photo and far improved explanation of what I was getting at.


beerchug
Re: b44 primary leak [Re: Richrd] #783991 09/11/19 6:22 pm
Joined: Sep 2004
Posts: 1,173
gunner Offline
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I never knew these vented breathers existed, thanks for sharing.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando

Moderated by  Allan Gill, Jon W. Whitley 

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