I just pick up a 2002 800 ZR with a Black Magic Super single, EGT gauges. a Power Breather Air box and a D&D clutch kit...the sled was ran last year with the pipe, clutch kit and air box and performed well...(I was told from the seller)..since then I have added the silencer a MBRP race can. I took the sled out and it idles at 500 degrees at about 1500 rpm.... and runs at 1100+ - degrees at 5000-6000 rpm..at a steady speed..about 40-50 mph. The temp outside was 0 degrees and I live in Maine...about 400' above sea level. I was worried about running it harder...it seems to increase in EGT as I increased the throttle. Should I increase the main jets...(all the carb turning is still stock)..or change needles position...seems to increase in temp just as the mains take over (about 1/2 thottle)...I forgot to mention that the air box intakes were closed up..I want to keep the silencer on..sounds great in the woods!!....any info would be helpful...sled runs great...just concerned about the temps....is this normal?? I just bought the sled yesterday...$4000.00...looks new...1300 miles on it. I live in Millinocket Maine...the paper mills just closed there doors last week files chapter 11... they owe 100 million dollars!!!...I said 100 million!!....1100 people out the door...sleds are selling real cheap here...the paper mill took all the 401k accounts, insurance, and pensions...wiped everything out..sucks for the people here. A Canadian group bought the mill last year called the mill...Bowater....nice northern friends!!