Over the last few years, I have been doing the odd re-ballancing of my Throttle bodies, and all has been quit well or so it seems.
But now, over the last 12mths or so, I have been having to re-ballance them on a more and more frequent basis. Its getting to the point that the throttle bodies
now go out of sync after around 180 miles of riding.
Has anyone got any damn idea or ideas as to what could cause this to happen.
I am stumped and feel like doing this 
to my head. (well not quite really) 
The shims were replaced about 2 or 3 years ago, so I don't think its that (could be wrong). The injectors were cleaned thoroughly 120 miles ago and
the butterflies are in very good nick.
Could it be the ECU (motherboard), or do I have an air leake getting in elsewhere.?
The bike is going into the garage this week to have ALL soft pipe-work replaced (all still original 13yr old stuff), which is probably the easiest and
cheapest first fix route.
Could the Throttle bodies be knackered ? Garage is pricing up a set from breakers yard for me to consider.
Is there a fuel/air sensor on the bike that could be knackered or a Lambda sensor ? Although I don't think such things are on this bike. (could be wrong again though
Oh and the mileage is knocking on door of 60,000 miles.
Regards to all
