vac advance question

[cygnak]

Pretty sure my vacuum units knackered. Before i try and source one can anyone please let me know if i am testing it right.
When i suck on the advance pipe the arm inside the distributor moves but then goes straight back down, as i am still sucking. I don't think its my sucking technique

Is the unit easy to come by, JK do a single advanced but mine has two pipes. I am looking at changing to Dells in the not too distant future so not sure if i will need the retard. I'm not sure the retard one from the weber 32/36 carb does anything anyway.

[kevtherev]

Pretty sure your right mate..
a constant suck should result in an un moved advance

[cygnak]

Cheers Kev

Wanted add going on

[Rozzo]

have a couple of dizzies here with the right unit on m8 if you want one? free to a good home of course

[cygnak]

Big thankyou to Rozzo for meeting me with a spare dizzy.

Swapped vac units this weekend and tweaked timing and carb and now motoring a lot better. Should be OK for Camperjam. Vacuum still a bit iffy but i think that is the crap carb. Taken the plunge now and ordered some dell's.