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450 runs rough and no idle

6.8K views 3 replies 4 participants last post by  Boost_it  
#1 ·
has been going on for awhile, it runs great with some throttle but idle has a real bad lope and it always eventually dies if left idling. also after getting on the gas for awhile and letting up it backfires sometimes. All this is on my 450 rhino.

my first thought was fuel filter which i replaced and no help and it has a properly gapped new NGK non irdium plug in it.

being cheap here are the things i am thinking of purchasing/installing to hopefully end this prob. i am not wanting to spend any money but i really want it to run right for once. so here is the list from least expensive up.

NGK irdium plug
ebay carb performance kit YAMAHA RHINO 450 PERFORMANCE CARB KIT FREE SHIPPING:eBay Motors (item 360142637240 end time Jun-25-09 09:37:55 PDT)

and finally a hunterworks tri fire

any advice would be great