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[Meteorstorm]

This works on the Meteor,you can substitute the 2 disc breather below the left barrel with latter type (straight swap) which will take a 1/2" hose,run that up under seat with a one way valve into an Indian breather can and outlet run to the rear guard.Block the crankshaft breather. That gives negative crank pressure and with some luck outlet hose will stay dry,but usually will eject oil if it wet sumps.

[Jakub]

Hi, does your oil tank cap have a hole in it? Vince

Nope. There is small diameter pipe inside located directly below the cap. When running there is huge amount of oil coming. Opening the cap with engine running can be really surprising.

[Jakub]

Jakub, thanks for the tip about the EPDM foam rubber seal. I ordered 7mm diameter, easy to fit and a perfect seal.
Rasp

Actually I am using 6mm string. Please let me know if 7mm works, the more, the merrier

[Jakub]

This works on the Meteor,you can substitute the 2 disc breather below the left barrel with latter type (straight swap) which will take a 1/2" hose,run that up under seat with a one way valve into an Indian breather can and outlet run to the rear guard.Block the crankshaft breather. That gives negative crank pressure and with some luck outlet hose will stay dry,but usually will eject oil if it wet sumps.

Sort of did that on the Constellation, instead od Indian Breather I've used one way valve, pictured below.
Now, when just slowly cruising, admiring the surroundings it works fine, but if bike is driven slightly more enthusiastically it's definitely not up to modern environmental standards.

preview.jpg (30.52 KiB) Viewed 103933 times

[Rasp]

Jakub,
The 7mm EPDM has worked perfectly so far. It easily pushed into the groove in the inner case and stayed in place. I cut the seal about 20mm too long, it could be compressed so that the ends could be butted together, at the top, under a bit of pressure.
Rasp

[Jakub]

Hi Rasp,
Good to know, I've recently ordered 15 m of this seal so I am covered for a while but for the future will go 7mm.
Jakub

[Vince2]

Hi, that is the return pipe to the tank , I'm referring to the actual cap which should have a small hole on the top to vent the tank. Vince

[Jakub]

Hi, that is the return pipe to the tank , I'm referring to the actual cap which should have a small hole on the top to vent the tank. Vince

There is no hole in the cap.

[Vince2]

Hi, if there is no vent to the oil tank then pressure will build up. Even worse if bigger pumps are fitted. Plus you have the engine breather dumping into the tank. Eventually the pressure will get to the point where the oil will stop returning and wet sump. Try removing the cap and tie a plastic bag over opening start the engine and see how quick the bag expands! Vince

[Jakub]

Good idea. Will do. Also I got three one valves pictured above, going to use them in different places will se how it goes. Preliminary activities point to blocked one way valves just below cylinder. Replaced them with older design outlet.