Hi lee, Im no mechanic but I'll try and answer from my experience.
Again, Im sure the boys here will correct me if Im wrong.
1: if yannih is right, then the problem will be solve if I unplugged the O2 sensor from the bike, with only downside of warning light flashing on Dashboard due to missing O2 sensor? Note that currently I leave my O2 sensor there -did not plug it into the exhaust but the problem exists. No error code flashing on the dashboard.
IN YOUR CURRENT SITUATION WITH THE O2 SENSOR DISCONNECTED FROM YOUR EXHAUST BUT STILL CONNECTED TO THE WIRING CONNECTOR, THE BIKE WILL STILL HESITATE IN GEARS 4, 5 AND 6 AT AROUND 3500 - 4500RPM WITH NO DASH CODE. IF YOU UNPLUG THE O2 SENSOR FROM THE WIRING CONNECTOR THE ISSUE WILL STOP AND THE BIKE WILL THEN RUN SMOOTHLY. IF YOUR CURRENT FLASH HAS PROVISION FOR DISARMING THE RESULTING DASH CODE AND IT IS SELECTED YOU WILL HAVE NO CODE. IF YOUR FLASH HAS NO PROVISION OR IT HAS NOT BEEN NOT SELECTED BY YOUR FLASHER, YOU WILL HAVE THE DASH CODE. IF YOU ARE RUNNING A POWER COMMANDER YOU WILL HAVE THE DASH CODE REGARDLESS. THIS IS WHERE O2 ELIMINATORS OR OPTIMISORS COME INTO PLAY TO REMOVE THE CODE.
2: if I use an O2 optimiser from dynojet then the problem will be solved too?
I AM NOT TOO FAMILIAR WITH THE O2 OPTIMISORS BUT UNDERSTAND THAT ON SOME YEAR MODELS AN O2 ELIMINATOR CAN BE USED AND SOME AN O2 OPTIMISER MUST BE USED INSTEAD (SEE LINK "Flat spot 3-4k" IN ONE OF MY PREVIOUS POSTS ON THIS THREAD FOR MORE INFORMATION) BUT BOTH SIMPLY STOP THE DASH CODE OCCURRING WHEN THE O2 SENSOR IS DISCONNECTED FROM THE WIRING CONNECTOR.
3: if I send back to Brock the problem will likely not be solved as yannih already flash his twice right? Will it take the risk of doing worse ...
MY UNDERSTANDING IS WHILE THE THE O2 SENSOR IS CONNECTED IT WILL OVERRIDE ANY FUELING PROVIDED FROM A FLASH OR POWER COMMANDER. THEREFORE RETURNING FOR A REFLASH WILL RESOLVE NOTHING NO MATTER WHAT THEY CHANGE. IF YOU USE A POWER COMMANDER OR YOUR ECU IS FLASHED YOU MUST DISCONNECT THE O2 SENSOR. IF YOU HAVE A POWER COMMANDER YOU NEED AN O2 ELIMINATOR OR OPTIMISOR TO STOP THE DASH CODE. SAME IF YOU HAVE A FLASH WHERE THE CODE HASN'T BEEN DISABLED WITHIN THE FLASH.
4: I actually think one option is to leave it this way by performing a routine manuever every time I ride the bike . But I believe this will build carbon in my combustion chamber for pig rich fuel. - my mechanic said thick carbon from my pipe proved incomplete burning of fuel.- could someone tell me after the manuever the bike perform better ? This I have no idea cause I do not know how to compare. No dyno , no new stock ECU...
I DIDN'T TRY YOUR MANEUVER WHEN I HAD THE SAME ISSUE AS I WANTED THE BIKE FIXED, RIGHT AND RUNNING AS IT SHOULD WITHOUT ME WORRYING ABOUT HAVING TO PERFORM THIS OR THAT WHILE RIDING TO CORRECT. ESPECIALLY THINGS THAT THE BIKE WASNT DESIGNED FOR. I DONT KNOW WHAT MAY RESET, AND I DONT KNOW IF PERFORMANCE IS SOMEHOW IMPROVED AFTER YOUR MANEUVER, BUT I DEFINITELY WOULDN'T RECOMMEND IT. THE BIKE HESITATING IS ITS WAY OF TELLING YOU SOMETHING IS NOT RIGHT AND NEEDS RESOLUTION. LISTEN TO IT AND YOUR MECHANIC OR YOU MAY HAVE MORE SERIOUS ISSUES IN THE FUTURE.
5: what better option do you think I have?
I DONT THINK YOU HAVE ANY. MAKE YOUR CHOICE. BACK TO STOCK WITH O2 SENSOR CONNECTED, OR EITHER FLASH / POWER COMMANDER OR BOTH WITH O2 SENSOR DISCONNECTED WITH APPROPRIATE O2 ELIMINATOR / O2 OPTIMISOR OR FLASH SETTING TO STOP THE RESULTING DASH CODE.
My bike now runs perfectly after a lot of help from experienced people, research and time plus effort.
The resolutions are here if you choose to use them.
It's up to you.
Hope this helps...
* Last updated by: yannih on 7/6/2015 @ 6:39 AM *
2012 Metalic Spark Black Kawasaki ZX-14R.
Yoshimura carbon R-77 slip ons,Custom dyno ECU flash,Striker rearsets,Hyperpro RSC steering damper,HM Plus quickshifter,ASV C5 levers,Hel SS transparent red front/rear brake and clutch lines,Kawasaki/MRA vented spoiler screen,Carbon heel guards,R&G radiator guard,Powerbronze carbon rear hugger,ZX-10 front fender with fender extender,Yoshimura frame sliders,M-Factory rear stand stoppers,Escort Redline radar detector,Techspec tank grips and tank protector,Versys 1000 fender eliminator,Kaoko cruise control,Moto red oil cap,Oxford heated grips,Red magnetic oil drain plug,Red and black Bagster Spider rear seat bag (for touring only).