Does it have stock jetting? I have a 98 Yzf and it doesn't like to run below 50 degrees. It is most likly running too lean. I had mine up and running last weekend for the first time since Oct. and it wasn't happy.
Try bumping up the piliot 1-2 sizes. and turn out the mixture screw to 2 1/2.
Hopefully it will warm up soon and it won't matter.
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Pretty much everything that that needs to be figured out, can be figured out in the garage
Yzracer49
98 Yz400f
00 Pw50(Daughter)
93 Xr100(Wife)
8? Kdx175
71 Ke100