1981 GS450E right cylinder not firing at low rpm

[Nessism]

another thing...

Can you really add a MAC 2 into 1 exhaust on a 450 without needing to rejet?
-charles

Um, no. Suzuki jetted the GS450 ultra lean to begin with and adding a free flowing exhaust will only compound the problem.

[nabrams]

If you've got 145 psi on both cylinders then you don't have to worry about the valves.
Don't mess with things that don't need fixing.

[prefect]

do you need a special tool to do a leak down test? The pressure should stay constant, correct?

What could cause a compression leak? Just asking because the pressure was going down very quickly when i did the test, but that might have been because it was a really cheap tester and i was a little nervous to really tighten the nozzle into the plug hole out of fear of stripping it.

should i rent a tester from autozone or some place like that to get a more accurate reading?

-charles

[nabrams]

My $40 tester shows what the maximum compression was and stays there until re-set. When your engine is spinning during the test it goes up and down in pressure for each cylinder.

[prefect]

that's what i thought. my max pressure was 145 in each...