Well i bought the bike from my dad... he didnt THINK that it did this, BUT he didnt go ride indoor arena cross when its 30 degrees outside either. IT has not been very long since i did the valves and from my experience I think this might be a jetting issue in the COLD. ( the more i thikn about this the more i think that it wasent this bad on the warmer days)since the carb is already off and the jet is easy to get to Im gonna try that first.... if that fails then all signs point to the valves (which will suck because I will be adjusting the valves every 3 rides from here on out ) as soon as the jet gets here i will let everyone know !!!