Hey, if you're willing to modify my stock carbs for $60, I'm more than happy to give that a shot. I've still got them, and they're in great shape. I also have basically every jet available for them. I was planning to just sell them on ebay as I figure they've probably got reasonable value as working stock carbs are getting harder to come by. Was keeping them in case I give up and sell this engine for a stocker so I can ride my bike again
So you guys are saying you can't go full throttle at low RPM, even slowly? It seems like I should be able to slowly open the throttle all the way at 2,000rpm? I can understand that without an accelerator pump I can't snap it open, but it should be able to pull hard enough that I get a decent mixture if I open it slowly, no? Having to wait until I'm over 4,500RPM to go full throttle (even slowly) doesn't sound very rideable for a street bike.
Even that aside, I can't even open the throttle past 1/4 at idle, except very very slowly if I set the needle/needle jet lean enough so that it's not running crazy rich once the throttle is open. Currently, I've got it rich enough that I can open it to 1/4-1/2, but it's very rich once it's there.
Here's my current setup. This is the "obviously too rich, trying to make it so I can turn the throttle *at all* without instant death setup. I can make it run better constant-state with leaner needle/needle jet, but at the cost of only being able to rev it past idle by just barely breathing on the throttle grip until it gets over about 3,000 rpm. Constant state seems happier with a 6F17 needle in the richest clip, Q2 needle jet.
Main Jet: 170 (possibly too rich with the needle I'm running, but I'm trying to get the mid-range sorted well enough I can ride it to jet the mains)
Slow Jet: 25 (runs a bit rich with a 25, it'd prefer a 20, but richer slow jet compensates for the fact that I can't go smaller than a 2.0 slide)
Air screw setting: 1.5 turns out (also, a bit rich, it'll run with the air screw removed and a #25 pilot)
Needle Jet: 159-P5 (I've got a bunch richer that will work with leaner needles. I've also tried the fattest 176 I can find (176-Q4), and it's way too lean even with my richest needle.)
Needle: 5L1 (Richest I could find, and pretty much the only one that will let me twist the throttle at all without it immediately dying)
Needle clip: on the richest, throttle response is best, in the middle, throttle response isn't as good, but it's slightly less rich in the 1/4-1/2 throttle position.
Fuel height:
or Float height: Stock
I've also played with both 2.0 air jets, and with the air jets removed (no real difference in the mid range, as to be expected...)
I'm leaning toward the VM30s. I figure they can't be worse, and my brass is interchangeable. Only, the VM30s appear to only come in left-only configuration, so I guess that means I can try 1.5 slides, too.
I'm pretty sure the cam timing is on. If it were a tooth off, I don't think the valve tappets would be loose at the right marks on the on the stator (they are). Also doubt it would run so well above 8,000rpm (it purrs up there), as well as idle beautifully, which it also does. From what I understand mid-range reversion is to be expected with large valves and a long-duration cam, which is what I've got.