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Discussion Starter #1
I've been trying to find out information on the 660 four stroke engine to see if any performance modifications can be completed for a reasonable price, if at all. Anyone have any information on this engine and if it can be modified?
 

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Don't waste your time trying to modify that motor , wait till next year.With all of the talk of the Rx-1 from yamaha. Arctic-cat will definently have a 4 stroke to put them in their place next year. Count on it.
 

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Don't waste your time trying to modify that motor , wait till next year.With all of the talk of the Rx-1 from yamaha. Arctic-cat will definently have a 4 stroke to put them in their place for 2004. Count on it.
 

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Well, I bought the 4 stroke with the intention of giving it to my wife, all in anticipation that Cat would be introducing a more powerful 4 stroke to compete with the rice burner, but what a dissappointment to learn NO new four stroke for 2003. If I could modify this four stroke sled to get more top end, then I could buy a 2003 Cat four stroke for the wife, keep my modified one, and wait till 2004.
 

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Discussion Starter #5
Well, I appreciate the input, but I must have a second sled for next year. Looks like the Yamaha 4 stroke is my only option.

Bummed.
 

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Just returned from the snowdeo in New Hampshire. All factory reps were present. Everyone hovering around the Rx1 four stroke, and Yamaha really layed it on thick. Yamaha and Cat were next to each other. Almost no interest in the new Firecats compared to Rx1. Most commenting that most fratures on the Firecat were copied from the Viper. Spoke with the factory regarding engine mods, they strongly recommend against it. Saw the new four stroke, factory reps said they had been riding it and could get an honest 70-75mph. For 2003 the intake and exhaust systems totally changed. When I asked if Cat had missed the boat in not introducing a more powerful four stroke, one of the factoy reps just looked over at the gathered crowd around the Rx1 and said "what do you think?"
 
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