Z1OwnersClub GB

I previously asked for help regarding No1 not firing.After some good help i replaced inlet rubbers & lapped in valves.

After, all 4 fired up but a bit smoky.compression good at 150.Checked vacuum.2,3,4 balance great.but 1 off the top of the scale & won't adjust.When i checked vacuum tube it had a lot if oil in it.
As i had not ridden the bike since replacing valve seals i didn't use another new gasket.
After checking all again the following day i notice No1 has dropped to 120.
could the gasket be leaking between the bore & an oil way? would this also course the high vacuum?

Thanks for any help

sounds like ya cylinder head may be cracked ..for oil to get in the vacuum part it can only get there via inlet valves or a crack

Isd there any question about the integrity of the gauges and how they are working?
What type are they?
If Morgan; check the tubes / dampers and reverse the gauges to give a second opinion.


AL

After taking off the carbs & static balancing them the problem seems to have improved
the vacuum on all 4 are about the same but a bit hight.[36]
but at least all are now on the scale
still a bit smokey but not as bad.
I think the problem is that with a high vacuum it can suck a little oil past the seals.
Will have another tinker to see if i can get vacuum down in the 20s.Which i hope will stop the smokeing