Re: F2 never warming up completly
I also have a F2, and my bike was overheating right after I started it. I called around for a new thermostat and couldn't get one that day. I talked to a guy that sets up track bikes, he told me to take it out and gut it. Doing this will increase your warm up time. With a gutted thermostat my bike stays so much cooler. I would say that either your thermostat has been gutted, or it's stuck wide open. This will cause it to sputter if it's not fully warmed up. In colder temps, it takes a whole lot more to get it to a decent temp. Cold temps, plus constant cold anti-freeze flow through the motor, will make a bike sputter and run like crap.