Hi guys, last week I aquired an old MC18 race bike.

It's been sitting in a shed for years, the slicks on it were shot etc. However I've had it up and running with 25:1 premix with TTS Full Syth problem is the bottom cyl only appears to be firing intermittently (well one smokes like a b*stard the other only has wisps that increase with revs, like my other 2stroke)

I see it's an R2J as it's 1988? Anyhow it has PGM not PGM II and the old style MC18 pipes. Do the first MC18's with PGM have issues with missfiring due to dry solder joints in the cdi like the old MC16 (since its not PGM II).

What sort of compression should I expect out of these things with a tester ?

Also what else should I do to the thing, I've lubed up its chain which doesnt appear to have tight spots. It'll have new slicks front and rear, i've dismantled the calipers cleaned up the pots and completely bled the brakes, got new sparkplugs in it. Isn't running a filter in the airbox, but it doesnt look to be modded at all. Fairings are rough old fiberglass that have seen tarmac a bit, so i'll give them a cheapish race paintjob too.