Found this old thread in a search, along with another thread where Hermit mentioned 40mm PVC waste pipe fits into the inlet manifold. Cheers Hermit, fits like a glove.

So I made a leak tester. First I tried removing the mufflers and plugging the exhaust there. It was a little optimistic I know. The exhaust flange didn't leak a drop of oil, but wouldn't hold any pressure.
Then I removed the spannys and plugged the exhaust port/manifold and yay, air tight seal in the engine.
First test:
Cylinder A=9psi
Cylinder B=0psi

1 hour later:
Cylinder A=9psi
Cylinder B=0psi

Nice.

Test two:
Cylinder A=0psi
Cylinder B=8psi

1 hour later:
Cylinder A=2psi
Cylinder B=6psi



Another hour passes:
Cylinder A=2psi
Cylinder B=6psi



So I have a tiny leak one way between cylinders.
Not cool what so ever, but not life threatening if it doesn't get any worse.
I have decided to do another 50 odd kms and check it again.
I have a Koso dual EGT attached now which already paid for itself the other day.
I changed main jets, when reattaching the air box I accidentally folded over one of the carb to air box rubbers and it was leaking air. Didn't notice until I rode it and saw the EGT doing weird stuff. Throttled right back, nursed her home and found the problem.


Last edited by {.bLanK}GoD on Mon Dec 06, 2010 1:39 pm; edited 1 time in total