idle: achieved

[Anonymous]

No joy so far in finding berryman's or any carb cleaner other than the spray sort. My 'gunk' engine degreaser is pretty strong stuff though (it eats rubber for tea), they came out spotless and all passages seemed clear.

I suppose my question is: If it were a blocked idle passage wouldn't the 42.5's be nearly as bad as the 40's?

It runs great with them (42.5's) in, other than the lag in increasing the rpm's when the throttle is slapped back. Settles back to idle nicely too. (and no black plugs)

Keep in mind I've got paired k&n's on. When I back the mixture screws right out the idle improves but not sufficiently.

 

[Anonymous]

Also if the idle circuit was blocked wouldn't it still run with the choke on (choke circuit)? I think my idle circuit is fine because with the up sized pilot jets I don't need choke to start (too rich, I know) and all cylinders run. I figure a blocked choke circuit could stop #3 from running and I'm not letting it heat up enough before trying to take off the choke.

Any quick way to check if the #3 choke circuit or do I need to strip them down again?

 

[Anonymous]

All sorted now, problem was the valve lash and a 'swiss cheese' exhaust header. New shims and a heat wrap now she runs great....As far as I can tell in the shed.
I gave it some Seafoam through the vacuum plugs while syncing (and in the cabs and tank), pistons look a lot better now. This probably helped reduce the lag too.
Nest step, raise those needles!

Oh yeah, I kept the 42.5's in.