High vacuum,Think i may be on the right track

[zman]

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

[steve.w]

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

[Al]

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

[zman]

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