Hello guys, been a while since I have been on here but I have an issue with a 03 1300 I just picked up for my son. It basically bogs during midrange riding and gets terrible fuel mileage. It is all stock except for a d-plate and chip, 91 hours and 120 lbs across all cylinders. We can ride together with me on my 1200r and he burns twice the fuel and is about 5mph's slower on top.. Any help is greatly appreciated! I've already checked the pv's and they appear to be working correctly. Also, the trmp sensor located on the front cylinder is extremely corroded. Just wondering if this sensor had anything to do with fuel mixture.