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My subject is a 2006 Apex Mountain that is natuarally aspirated with about 3500 miles on it. It has a gutted airbox and LCC under tunnel exhaust and runs CR10EK plugs, otherwise, the engine is stock. For the past couple of years I have been struggling with what I can describe best as an overall loss of power and inability of the engine to maintain power when put under any sort of a load. Numerous sarches have yielded me little information with respect to some things to look for in terms of engine related issues and or power loss. I have tried numerous clutching adjustments from stock to custom setups all with miserable results. Any sort of a load on this machine will cause it to fall on its face, like you crack the throttle at the base of a small hill and the tach nearly bounces off the limiter settles in around just above 10K RPM, and once you start loading the machine or getting it into any type of snow with depth, that tach will just unravel to like 7K RPM and there I sit. It seems like it might be defueling or something, but I don't know really where to start. My first step this week is going to be to do a compression check on the engine and then my next thought was to get it to a good dyno tuner who is familiar with these engines and work through it from there... Any suggestions? Anyone have any suggestions for a good dyno shop in MN? I'm at the end of my line with this thing and I know it is capable of being a good riding sled, its really just been falling apart the last couple of years or so and is very disappointing. Any help or ideas would be greatly appreciated!
Corey
Corey