I'm trying to find information regarding ignition timing maps for sleds of this approximate vintage. As these sleds have gotten older, Polaris has discontinued CDI modules and repairs can only be accomplished by buying used parts - in some cases from different models than the original sled. Did Polaris publish ignition timing maps in any of their service manuals? I have a few timing maps gleaned from various sources over the years - I assume these originated from service manuals? Does anyone out there have access to manuals that have this information? If so, I'd love to hear from you. As years pass, I've been receiving more frequent requests to assist in repairing these older sleds, so trying to collect as much information as I can in order to assist. Thanks!