I have read through your posts on carbs and have helped a ton, thank you! To answer your question...I have no idea, the PO had little clue, bought a Challenger as a parts boat for this Speedster. I did notice there were different color springs in two of the carbs and from what u have read that might be possible if needed to dial them in but all needle & seats as well as jets were as in the manual. The rebuild kits I purchased from OSD and they state the parts are Mikuni OEM but the kids cane only with new needle and seat, not springs. I have done the pop off tests with the springs that were in the carbs. So in your response I am reading best course of action is to obtain a new set of springs with hopes that will bring the pressure closer. From there would I be correct that you would change needle and seat up or down to dial in pressure? Is the intent for both carbs on each motor to be close to each other in pressure?
