I'm brand new to this and got my 2 kids racing with animal motors. We have 4 engines that sat for 10+ years and we raced them in about 5 races each. One smokes like a chimney. I'm looking at getting freshened(if that's the right term). Were up in Northern Wisconsin, anyone know of a good place to get these done? Also we were off the pace last year. I didn't adjust the clutches and they were ran by adults over 250 pounds, my kids weigh 80 and 110. Could clutches be a big cause of not being up to pace? Thanks for any help I can get.