I had both mods done at the same time. the carb, and head on my 04 300. What a big difference well worth the money. No stumbles, clean revving, and I haven't really jetted it yet. I always had a minor stumble, and it would load up even with the plug showing light brown. The air screw actually does something. The plug is a dark brown after a mixed terrain ride. I explained my riding style to Ron. Trail riding, so I don't need a big "hit". He provided the correct needle. Low end is very strong, with a little "hit" midrange, and the speedo saw 83 yesterday, tucked. Factor in 10% error, it's still fast enough.
Fuel economy seem very good, just a tick over 2 gals to do 88 mile loop. Speed range was 15mph in the rocks to sustained 50mph, hard pack, rocks, and shallow sand. At any speed you can hold a steady throttle, no hunting, or blubbering.
Mike.
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04EC300
04Wild450
07FSR450
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