I don't know what the bike is like with the OEM needle and emulsion tube, it came with the Dynojet kit already on it. The needles in Factory Pro kit have numbers, but I don't know what it means, I think they have their own in-house number for it. I have new replacement OEM needles that came with rebuild kit, but the package says it's for 600, 750, 900, doesn't discriminate which one. Those needle says y271. Do you suggest that I try that OEM needle, maybe, even if only to set the baseline?So what size is the factory needle jet?
If you measure the factory needle at the butt and compare it to oem or the old dynojet needle in the same area what size is it?
There are plenty having great luck with factory jet kits and needle jets but imho when you start making changes without knowing what the change is you can end up lost. Oem needle jets are measured and marked different for 600,750,900 etc so what is the needle jet now marked for size? did you get the correct size?
I opened the left side cover, reset the pick up to it's original place, and shaved 3.92mm off of the flywheel hump (3 degrees). The carbs are apart again, I'm waiting for new gasket kit for them (just in case).