I was gonna be a smartass and ask if there's oil in the tank... So yeah, that's somewhat disconcerting. My BSA A50 (the 500cc single carb) has a leak from that junction bloc that we've never really been able to fix. We even machined the crankcases when the motor was rebuilt to try and get a flat mating surface. Obviously new gasket, a decent sealing compound... maybe I'll try the o-rings next, who knows. Cheers!
@mysticapprentice as I said, I tried the typically supplied seals and no joy. The originals are square cut so not even a typical oring. After looking closely they didn't really seem thick enough to protrude above the manifold itself so I figured it was worth a shot to try something thicker. Not easy access there either as I'm sure you've already seen. Anyway it worked our fine in the end, best of luck, I've been wrenching on this stuff for over 50 years but learn every day...
Thanks for the tip, I'll give it a try. Indeed, it's surprising how much information and knowledge seems to always come up around these bikes. Part of why we love them I guess!
I was gonna be a smartass and ask if there's oil in the tank...
So yeah, that's somewhat disconcerting. My BSA A50 (the 500cc single carb) has a leak from that junction bloc that we've never really been able to fix. We even machined the crankcases when the motor was rebuilt to try and get a flat mating surface. Obviously new gasket, a decent sealing compound... maybe I'll try the o-rings next, who knows.
Cheers!
@mysticapprentice as I said, I tried the typically supplied seals and no joy. The originals are square cut so not even a typical oring. After looking closely they didn't really seem thick enough to protrude above the manifold itself so I figured it was worth a shot to try something thicker. Not easy access there either as I'm sure you've already seen. Anyway it worked our fine in the end, best of luck, I've been wrenching on this stuff for over 50 years but learn every day...
Thanks for the tip, I'll give it a try. Indeed, it's surprising how much information and knowledge seems to always come up around these bikes. Part of why we love them I guess!
It's like sailboat racing, perfecting an obsolete mode of transportation .
Just give her a bit of time 😂😂