From what I have found the Arctic Cat voltage regulator (AC part number 0630-001) works the best for most carbed Polaris sleds. They are a two wire regulator which are a pretty simple install on Polaris sleds. The 0630-001 regulators came on a lot of mid 90's early 2000 Arctic Cat sleds. If you need to look one up just spec'd out one for a 2000 ZRT 600 and they run about $32 plus shipping from Arctic Cat Part House.com