Ever since it got cold around here a month or so ago my bike (00 GSXR 600) has been running like ass. When I first start it, it's great but when I get out onto the highway and the bike starts to cool down, the throttle becomes unresponsive at low rpms and sometimes it'll even stall. If I pull over or if I'm sitting in the traffic with no air flowing over the rad, then it works fine. What gets me is that normally in the summer, on the highway, the engine temp will read around 79, these days I've never seen it below 76. Why would such a small change in temperature make the bike run so poorly? Today I put some duct tape over the rad and the bike was reading about 80 - same problem. I pulled over and when the throttle was responsive again it was reading 100. It should be mentioned that the bike has a Yosh can and has been jetted (I think the previous owner raised the main jets to allow for more fuel). What's going on here?