Reply To: Jetting a GT125R – 2017 ..?
Todays color…after 1 hour city-riding (slow), = white…
I have “touched up” the rear intake. Fuel-injection / micro-squirt, or similar is tempting, if I can find the funds…(and cheap parts).
The reason for larger jets, in a smaller engine, is the “signal” the carb gets is smaller. Same carb on a Harley, may be way too rich…
And pilot-jet size is mostly (by factory) determined by emission. I tune for drivability. My little contribution to a warmer world…is less than what comes out of a pigeons back. (Yes, tried 17,5, and 20. still too lean; evidence: when you can turn mixture-screw a full turn in or out from “best” setting, and engine-rpm changes less than 50-100rpm, jet is to small. Same rule goes on a 2-stroke, a 2,0-SOHC, a 5,0-V8, and so on…)
Old and grumpy,(?), have fairly wide engine & tuning experience, "restoring/resto-mod" on cars & mc, worked as electronic tech. (retired).
GT125R - sold. New (used): 2012-GT250R-efi (sold)+ 2017-GV-125C (sold) - got my old 2018-GT-125R back... 🙂