GS550E 1981 Model - Smoke from top breather pipe

[Bike Extreme]

Hi,

Can somebody tell me if it is normal. As you know I have rebuild whole top end of bike.

I have now the following problem, she drives lovely but after about 10km everytime she start to smoke from the top breather pipe.

Please help.

[Nessism]

Vapor from that tube is normal, as long as it's not excessive. Actually, that's what it's there for.

Sorry, hard to keep track of every member and their bikes, but if yours is freshly rebuilt, make sure to torque the cylinder head and check the valve clearances at regular intervals (each tank of gas for example), until everything stabilizes. If you are questioning if the blowby gasses are normal or excessive, best to perform a compression check or leak down test. That will tell you if the engine is sealing up well.

Good luck.