Bad Cam Pic
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Thnx. If any of you have a unanswered question this is the guy to do it. I've seen you answer almost every tech question out there, great work! Heres one for you, the decompression system on the cam: are you supposed to prewind the spring? Would have a pic of it installed correctly?
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The spring is already pre wound. All you have to do is hook the small end under the cam stop pin,the longer end goes on the detent lever. Then you should be able to push the detent lever and it will retract back. Wish I knew how to show pics from the manual. Could be some videos around on this also. OPT
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That and the old u-joint drive shafts on the 96-98 model Sportsmans.Expensive if you didn't keep em greased and had to replace the entire shaft because of damaged yokes (about $425 per side) Other than that the 500 was and still is a good engine whether it was in the Sportman,Scrambler or Magnum. Just my old OPT
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I found some that had good maintenance have the cams go out,others that didn't have as good care are still running around.I think there had to be different batches of soft heat treated cams mixed in with stronger cams. I just started checking all the 95-99 Magnum 425 and 500s and the 1996-2000 Sportsmans and Scramblers when they came in just to be sure.Looks like you have one of the good ones with that kind of mileage! It took Polaris until the 2001 HO engines to get rid of this problem. OPT
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I am an old retired fleet mechanic. Back during the 70s we had the same thing happen with Chevy cams. No rhyme nor reason, all were treated the same as far as maintenance went but some would come up with a bad lobe and needed changeout. Seemed as if they had the problem conquered about 1980. Probably had to do with heat-treatment & Quality Control.
Fred
Fred
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Cliffno350 (01-06-2023)