Based on the fact that your last mods were to lean the mixture relatively
, the "now runs rough on choke" (like a normal cold ZX, great off choke) and RPM increased dramatically after it was warm, probably meant that the low-speed circuit a/f ratio was
off-the-scale rich before, like 11:1 or something...which also will make hot
starting much easier now as apposed to before.
Why? Going back to your ride, the idle speed was holding the butterflies open a little bit and resulted in idle at 3K-4K. Being that was how it was setup for the previous richer
mixture, more air would cause a lean mixture to give the sensation of running out of gas, whereas an overly rich mixture would require more air just to keep from drowning the cylinders.
Test: Go for a 10+ minute ride so everything is up to temp and return home. She should idle where you have her now. Blip the throttle and see how quickly RPM returns to idle.
Quick = good/normal
slow hang = lean
If normal, see how she starts hot. Probably better now.
If lean, change float height to 14mm and try again.
Alright! Trading bikes for a while was fun.I'm ready for mine back. No, seriously, get off my bike. Ahh, what a privilege it is to have such a sweet ride.
At the track she's said to be outclassed, but on the street, she reigns unmatched. She's the only big-bore canyon carving hypermiler I know of. -- Picture gallery
, K&N air filter, SuperTrapp
Aluminum Racing Series exhaust (Made in USA)
, ZG touring shield, & otherwise stock.
Science & OODA literate. ACA covered.