Guzzi breather plumbing

[F-22]

The way Guzzi routed all the breathers always bothered me a little. Especially on my T5 where the main breather line has two sharp curves to reach the inlet on the frame, and the big tube tends to pinch really easily. At first I only wanted to change that main line, but I ended up doing all of them.

For the main line, I simply used real 18mm plumbing copper tubing, with sharp machine-made 90 degree elbows.



For the rest, I used some spare (refrigeration?) bendable copper tubing. You can't bend it as sharp, but still much better than a rubber tube.






Now I'm thinking about perhaps doing something similar with the fuel lines too (depends on how well I'll be able to route them).
I love how little space it all takes now.

[bigbikerrick]

Nice work, F 22! That should last forever!
Rick.

[Two Checks]

Now ya gotta keep em polished...

[F-22]

Now ya gotta keep em polished...

Yeah, I hope they don't get that nasty green copper patina (though they probably will). Sometimes it just turns very dark/black. This is why I considered chroming them... But with the fuel tank on, they're hardly visible, so I don't think I'll do anything more to them for now.

[n3303j]

Steam Punk Guzzi. All you need is a couple of big brass dial gauges (temp & pressure maybe) coming off those lines and you are set for a week at Burning Man.

Hope vibration Isn't your undoing.

[F-22]

Hope vibration Isn't your undoing.

There's still ~2cm of a rubber hose connection between the copper and the engine/frame fittings, and I "dressed" the sections of copper which would rub against stuff in rubber (those zip-tied sections of rubber are just to hold it on, there are no connections underneath).

I think I shouldn't have a problem. Pre-WW2 bikes did have problems, but they did not use any rubber sections, just copper with usually some coils/windings to relieve stress. The loop frame Guzzis didn't even use any such coils/windings on the steel cylinder head oil lines, but those did eventually make stress fractures and cracked.