999 burnmarks in throttle body

[CarsOrBikes]

thanks for clarifying safetyfish.

[safetyfish]

Took the bike last night and checked the setup of tps/Co/idle again.
Bike starts off at 2000rpm then settles at 1300 after about 2 minutes
This morning same thing again.
Bike starts and idles at 2000 from cold (23 deg C air conditioned environment) until it reaches operating temp and settles down at 1300.

Stalled only three times during the ride, but those were operator error and not the bike acting up. (Taking speed hump dead slow and not raising rpm enough as I let go of the clutch)

So far so good. Thanks again for all who contributed and helped out.

SF

[parmic]

Originally Posted by safetyfish

Bike is a 999R - 2005 model
ECU is a Corse racing ECU / Racing Air filters
Rest of bike is standard
TPS was reset
Cylinders balanced / CO set at 4.2% / Idle rpm at 1300

Problem: Bike will stall on idle at high temp, or whenever the mood takes it.
Coming into a roundabout this AM the thing died as I changed down in the gears, clutch was pulled in, the rpm dropped to around idle speed, just as I was going into second gear. This is getting annoying apart from dangerous. It feels almost like a sledgehammer is hitting the piston as it dies. It is not the running out of speed kind of dying. It is a violent stop.

Apparently, one thing to check is that butterfly valves opens equally. So I opened the airbox and had a look to see if this has any bearing on the problem. (I can already see trouble with getting that middle throttle cable back in position.)

here is the problem, it would appear that the front cylinder throttle body has seen flame at some point internally.
Am I paranoid or is this normal?
Why would this happen?
How do you fix it if it is a problem?

I have the exact exact same problem on my 2003 999, behaves normally until it settles on a warm idle, then it will stall. Brought it in all summer 3 times for check ups, the did a valve adjustment, at 17000km thats only 7000km after the first one, then they did a throtle body adjstment, tps adjustment, changed the spark plugs, cleaned the injectors. I put 2500$ canadian on it to get it working right, but it is still causing the same problem as yours, it will stall only when on idle and only when hot otherwise it is fine.
I finally decided to give up on motorcycles after injecting so much money and I am selling the bike on monday for 4500$ (half the market price), I'm cutting my losses and staying away from this ****.