First step for me would be to put a bottle of STP (or similar) fuel cleaner into the fuel tank. I do this about 3 months as the fuel we purchase is often less than perfect and impurities and muck and water and stuff easily gets into the tank and thus into your injectors. Clean them out with a full tank plus the STP and see if she runs better. If not then move on to next step. Good luck!!! Simon

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....