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Discussion Starter #1
Starts up great and idles the same. Jump on the gas and when you let off yhe gas she backfires. 1998 Sportsman 500 not efi.
 

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Welcome aboard. You might get more responses to your questions in the section setup for your ATV or in the repair and maintenance section.

If I can ever be of assistance with fluids for your ATV, just let me know.

Take care,
 

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backfires thru the exhaust?? or intake??
could try adjusting the valves
 

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Discussion Starter #4
1998 Sportsman 500

Thanks for your quick response. It only backfires out the exhaust. I've had this baby since new in 98. Not many miles and the maintenance always performed when needed. After hunting season i drained the gas tank and put her to bed. This spring she fired right up, and idles just about perfect. But when i open her up, then let off the throttle she backfires out the exhaust. Sounds like a muzzleloader going off. Now i can stay on the throttle as long as possible, but when i let off thats when she pops. I thankyou for your responce again. Clay
 

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welcome to the site!
 

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Welcome to the site!!
 
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