I put the carb back in the stock manifold just to test the engine in the truck with the gearing I put on it... It's WAY overgeared! Even with the clutch slipping like crazy, (hey, what's that smell?) it still does about 50MPH! Since the clutch slips and it's overgeared, it's not too impressive off the line, but the engine runs CLEAN and HARD! It really likes Sidewinder 30%. I gotta try some 40% after I get everything figured out.
The turn left = lean, turn right=rich gremlin was definately there, but it was tunable to where I didn't really notice it. I could probably stick the carb right next to the tank and it would be a little better without doing exotic engine mods, but I'm probably still going to try to relocate the intake port for the shortest intake possible.
Oh yeah, and it sounds really cool too.. like a really little, high revving YZ250F!
I'll post a picture of the working setup tonight.
/edit/ No picture, I already took it apart to design a new manifold. It's most likely going to have to be CNC machined, so it might be spring before this thing sees the track. Then again, it might be easier to buy another head and drill an intake port in the left side of it, (between the studs) sleeve it, and put a plug in the old port.
I've also been looking at the FS-30, and the case looks identical to the .26. They use the same head too. I just looked at the manuals, and the only difference is the .30 has 1mm bigger bore. If that is just the sleeve and piston, I might go BIG BORE!
Big bore is going to have to wait for my bank account to recover from fall cleanup / winter tires & wheels.... So, I took the head off and removed the valves, rocker arms, etc... and since there's so much wear on it, I'm going to deem it disposable. That makes it a perfect candidate for EXPERIMENTATION in the form of relocating the intake port! It will be as good as free even if I do destroy the head.