I have a 97 MM700 and i have a question about this sled. Yesterday, as i do every month, i fired it up and warmed it up. (no snow on the ground, except a 1/4 of an inch) It ran strong, after the belt was engaged at about i believe 4K or wherever it is set from the factory. But initially off the line, it had a bit of bog, and backfired twice. The compression is fine, 115-120-115 as it was just recently rebuilt, my pto went down last spring, and the carbs were cleaned as well. Any suggestions. I cant wait to ride it.