Injector balancing

I had my 12k service on the R6 (2005) the other day. When I picked the bike up the guy said you should find better throttle response as a result.

No idea what to expect, pootling around town I dismissed any better response. Then this morning I pushed hard away from some lights and the front went very very light, i think it lifted off the floor as I’ve never felt the front so loose other than a wheelie. And the point is it was under acceleration in 1st with the clutch fully engaged. Never noticed this before and I’ve pulled away like this plenty before.

Reading about injector balancing sounds more like they are cleaned during a service if need be shrug - none the wiser.

I’m guessing this is only something thats part of the servicing of a sports bike? And you’ll only notice any difference pushing it really hard I guess.

So “injector balancing” +1!! :smiley:

I understand it like this …

Dirty injectors restrict flow therefore they need to be cleaned, this cleaning is normally enough to balance them.

How it works is that the lambda sensor averages out a fuel:air mixture across all cylinders, with dirty injectors the flow can be restricted to individual cylinders. This can cause some cylinders to run weak due to the restriction and therefore other cylinders will run rich, some injectors will restrict flow more than others.

By cleaning and thus balancing the injectors the average fuel:air mixture will be the same across all cylinders, resulting in increased performance.

throttle body sync, nothing more to it.

^ This muchly

I thought this all went away with injectors and ECUs / it adjusts it automatically?

Nope, if you have separate throttle bodies, then they have to be synchronised to each other like carbs do so they’re all set the same, and all the cylinders are sharing the load equally.

Unless you are running a very expensive 4 channel ECU with a Lambda sensor in each header to adjust the injector pulse time accordingly

Which, if you’re reading this and don’t know what it means, you’re probably not! :smiley: