I have Todd's full upgrade, ECU, PC-V, Auto-tune. I running a Mistral end can, and stock airbox with K&N filter. Bike runs fantastic, except one area. Warm engine, starting from a standing start, or re-engaging clutch at walking speed, Normal RPM's for the task, but as clutch engages and RPM drops to 1750 or so (very predictable on the RPM's) I get a "drop-out" of engine power, almost like it's off, for a half second, then it kicks in again with a significant jerk. On a bad surface, this would be a hazard. Also looks amateurish when riding, but mainly just unpleasant. I could deliberately rev higher and slip the clutch more, but the bike really shouldn't behave like this, and I really don't like abusing the clutch. I checked autotune values and I have good values all throughout the low rpm/low throttle opening range.
Could this be a stepper motor issue, with the stepper motor changing mixture significantly during brief idle periods, with the computer needing a "lag time" to make up the difference, or should I look elsewhere?
Not TPS, as same throttle openings anywhere else in operating range produce no flaws.
Could this be a stepper motor issue, with the stepper motor changing mixture significantly during brief idle periods, with the computer needing a "lag time" to make up the difference, or should I look elsewhere?
Not TPS, as same throttle openings anywhere else in operating range produce no flaws.