Jaymichael
XS650 Addict
One of the spiffs of working at an automotive school is access to fun toys. I had set up my carbs using normal methods in the fall. I suspected my idle mixture was a tad rich as my most stable idle was found with my idle mixture screw pretty much all the way in running a 45 pilot jet. I ordered up a smaller pair of jets but to be sure where I was starting from I ran her on our exhaust sniffer last night. I confirmed she is running quite rich, started about 10% CO which is about 10.7:1, I closed the pilot screws completely and she dropped to 8% C0, which correlates to 11.5:1 fuel ratio.
I just swapped in some 42.5's this morning and will try running it again the next couple nights. If anyone has done this before, what specific fuel ratio did you dial it into? The tune up guys here are telling me in the range of 3-5% CO is what I should shoot for, that would put me around 13.3-12.6:1. Personally I don't mind keeping it slightly on the rich side to avoid higher temps, and a smooth idle is paramount of course. Any one gone this route? Care to share your results?
I just swapped in some 42.5's this morning and will try running it again the next couple nights. If anyone has done this before, what specific fuel ratio did you dial it into? The tune up guys here are telling me in the range of 3-5% CO is what I should shoot for, that would put me around 13.3-12.6:1. Personally I don't mind keeping it slightly on the rich side to avoid higher temps, and a smooth idle is paramount of course. Any one gone this route? Care to share your results?