In the quest to lose more weight from the bike I fitted a Muller Motorsport air filter conversion. For me it was easy to fit, as the bike already had both fuel tanks removed, once they’re out of the way its basically remove airbox and fit kit following their instructions.
You have to transfer the air temp sensor across from the original airbox and fit a small filter to the breather hose.
Instructions provide link to suitable starting point map as well.
At the same time I fitted new Venhill throttle cables and did some general cleaning.