Second petcock

[weh8127]

Anyone have experience with adding a second peacock to a SM sport tank that has to be painted anyway? This is a conversion rig with an R 75 engine and I'm worried about sufficient gas flow under load with a heavy sidecar and passenger. Anything special I need to know?
Many thanks.

[kmev]

You should place it a bit further outboard than the original bung to ensure sufficient clearance with the engine. The crossover tubes were originally brazed in. I didn't remove paint to confirm if the original bung was also brazed. I brazed the new bung in no problem. Instead of fully removing the crossover tubes and then having to plug a large hole in sheet metal, I cut the tubes close to the tank, made tapered steel plugs, and then brazed those in.

[niall4473]

I just gas weld the new stabbing on and weld up the holes for the crossover pipe, no problem at all.

[weh8127]

Did you fabricate the bung or are they available pre threaded?

[weh8127]

This piece is sufficient? https://vintagebeemerparts.com/20mm-fue ... 114000002/

[kmev]

That should work. This is where I got mine: https://www.bungking.com/20mm-petcock-b ... MjVp4X-H6Q

[monson2765]

I have owned a sidecar rig with a conversion since the 1975's. I converted it with R100RS motor and transmission plus all the wiring. I had also thought about two petcocks. I have never had problems with one petcock. My motor is the 1979 1000 with 40mm carbs. My sidecar is a Bender/Floran. I have had a Hollandia and a Ural on it since doing my first conversion. The Bender is lighter than a Steib but still pretty heavy. Last year I went to the RA rally in Maine. It was a 1000 miles each way. Had no problems with a 7-day trip. Bike ran great. I am getting up in years and there is security with a 3rd wheel. That said, it may not be for everyone. I do keep up with traffic though.

One has to get use to sidecar riding, but it not bad if you start slow.

I have not opened the forum for many years. It is good to here, it's still going. Will try to track of it.