Dreaming of buttsecks for years...
Join Date: Feb 2006
Motorcycle: Anniversary Edition 600 & 2018 Harley Street Glide
Re: K9 GSX-R 1000 C28 code
Nope. The 1000cc bikes use Keihin throttle bodies rather than Mikuni. The Mikuni flaw is limited to the 04-05 600/750. The Keihin units are a much better design. Typically a C28 code on one of them is due to:
1) A faulty ECU
2) A wiring problem
3) A faulty STP sensor
4) A botched powercommander install.
That being said, what's the history on the bike? Did this just pop up, or was there some work done recently?