Setting Fuel Injectors

Hi Guys

I have Norton 961 SE (31/200) 2010

One of my cylinders is a bit oily on the plug the other OK

I am hoping it is just running rich on that cyclinder, and if so, how do I set the mixture ?

Any help would be greatly appreciated

Roadrocket1098

The ECU sets the mixture by sending a signal to the injector, you can have issues with the spray pattern on the injector which is cured by getting it cleaned. One plug being oily however does not sound like a mixture or spray pattern issue but oil getting into the combustion chamber past the rings or down the guides.

Is the plug actually oily or just black like from an overly rich mixture?
Any oil film on inside end of the silencer exhaust?
How many miles are there on the bike?

Hi Guys

Many thanks for your comments

Apologies about delay..for some reason never received an email notification on the replies, so thought no one had answered

After a run out yesterday, the plug appeared slightly "wet"..I could not smell any petrol.............maybe my initial description was misleading

I could not detect any oil in the silencer

The plug colouring was what I would define as "rich" (black on the electrode area)

The bike has 7300 miles at present

No blue smoke from exhaust

How would you weaken the mixture?

roadrocket1098

Hi Guys

Many thanks for your comments

Apologies about delay..for some reason never received an email notification on the replies, so thought no one had answered

After a run out yesterday, the plug appeared slightly "wet"..I could not smell any petrol.............maybe my initial description was misleading

I could not detect any oil in the silencer

The plug colouring was what I would define as "rich" (black on the electrode area)

The bike has 7300 miles at present

No blue smoke from exhaust

How would you weaken the mixture?

roadrocket1098

The ECU sets the mixture by sending a signal to the injector

So you have to reprogram the ECU, which Norton have locked so thats out, you can get a new factory map if you have changed exhaust and not had it remapped to suit the exhaust. Nothing else you can do unless you want to start looking for potential over fueling caused by a faulty sensor ie a low temp being reported so the ECU enrichens the mixture as it thinks the engine is cold.

Best take it to a dealer unless you are used to maintaining a modern car, the basics are the same and require a different approach than a carbed bike.

Does bike run ok best over 30mph ?; & does it splutter a bit at low revs? ;if lamdasensors are faulty they tell the ECU to throw like 50% more fuel in the mix, try linking them out with the resistor kits that are spoken off of the the lambda delete thread ,certainly worth a shot doing in any case

I don't know where to place this question so will try here.
It's just a thought.
Will installing a power commander help / cure the richness?
Mines had De-cat and shorties, no remap, bike running very rich.
Nearest remap 2,000 km away.
Thanks
Simon