Same with me, Doc. I know if I make the hole bigger it moves the changeover to a higher RPM. I'm reluctant to do that with out a DYNO as I don't know how it's really going to effect it.

 

S&S e can operate engines with strokers up to 98 inches.

 

MY advice is to call S&S Monday, bunch of very knowing and helpful folks.
Don't think air bleed has anything to do with your problems.
I can tell you my bike is a rocket with no problems with idle or poping , excelleration, dead spots, nothing but go fast and quick and starts very easily.

 

66 is the S&S recommended starting point for an 80" motor...sounds like you have an obstruction in the intermediate circuit.

 

Hey, Tom, I don't think there's an obstruction in the intermediate circuit. Hell, there's nothing to it. One jet and a few transfer ports. This carb has been cleaned and re-cleaned numerous times. Rebuilt, twice, just in case I missed something the first time, everything flows well. This has been a long jurney and I could'nt imagine the bike needing bigger than a 31 in the the low end. But it finally acts like it's happy with a 34-35. At 66 on the main, you can tell it wants more gas but if I go bigger, it falls flat on it's face like it's now too rich. I just don't know what to make of it. I've sent 2 emails to S&S with no reply.

As it goes, I don't really ride the bike that fast anyway so now that it's finally running well (mostly) it's not that big of an issue. I'm asking only from a stand point of it not making sence and wanting to know why.

 

we would be after a vacuum leak - that is way too much low and not enough hi speed

the carb is compensating for air on the bottom to run at idle and hi the air speed is incorrect verses the fuel required

 

I've sprayed around the carb, intake and heads. No signs of any leaks. It's an '86 so there's virtually nothing to it. Where else might a leak exist? Could there be an internal leak in the carb itself? Has anyone ever seen something like that happen?

 

did you re seal the intake manifold if not start in that loation

you cant trust spraying it for a positive it does not leak

the taper seals are always suspect

 

Yes, at the carb and heads.

 

if you have a motor that has a very high VE ( volumetric efficiency ) than the jetting come way down as it does not need a rich mixture for the slow moving air / fuel mixture in the heads as its running normally in a harley power plant

But the combo for that takes forever to accomplish with very indepth experence

sure you might have hit a spot -- but the low speed for me a is the give up on that idea, as it is way off - and a hand drilled jet is the same a garden hose opening in precision tuning, in order to go back to the spot you were at with a change that did not produce

Caution - you could really hurt the motor if i am right - not saying i am but you need to have another set of eyes look at it before a trip down the HWY at speed -- johnjzjz