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96 sportsman 500 will not rev up

  
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96 sportsman 500 will not rev up

 
mikebfisher mikebfisher
New User | Posts: 4 | Joined: 11/08
Posted: 11/18/08
10:24 AM

I have a 96 sportsman 500 that will start and idle great but will not rev up past 1/2 throtle.  Cleaned carb and new fuel and plug.  Someone please help  

 
SLAW SLAW
New User | Posts: 1 | Joined: 12/08
Posted: 12/02/08
09:38 AM

Hello, cam shaft has the exhaust lobe wore down or off!
use synthtic oil in the 500.  

 
mikebfisher mikebfisher
New User | Posts: 4 | Joined: 11/08
Posted: 12/05/08
02:13 PM

Had a new cam put in it last year  

 
mikebfisher mikebfisher
New User | Posts: 4 | Joined: 11/08
Posted: 12/23/08
06:03 PM

Fixed it with a new cdi box.  

 
jason132 jason132
New User | Posts: 2 | Joined: 01/09
Posted: 01/13/09
01:40 PM

I have a polaris 335 sportsman 2000 it starts and ticks over lovely but after 1/2 throtle it will not rev anymore have changed the carb 3 times and have put a new cdi box on but still the same.can some one please help cos its doing my head in.  

 
goodblasson goodblasson
New User | Posts: 2 | Joined: 01/09
Posted: 01/14/09
05:00 PM

Same problems here. I only get 1/4 throttle out of mine. I hear its a bad cam, but I have pulled my valve cover and rocker arms off and it visually looks good. Valves open and close evenly on intake and exhaust side. Makes me sick, anyone got any suggestions on how to fix this? I have replaced all carb parts, rebuilt fuel pump, and set valve clearance. Still nothing...