03 sportsman 600 twin valve adjustment
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Did compression test today. 125 and 110. Not sure if that is normal for this atv or not. Seems ok. Tried to look at cam but it is in the crankcase so didn't want to tear that much apart without having gaskets and such. Engine will start and idle ok. As soon as any throttle is given it bogs down and dies unless you let off throttle then it will idle again. Sometimes back fires alittle. Took air box off to see if it was being restricted and it does the same. Replaced carb with bran new one still same thing. Checked spark with inline spark tester on both cylinders and seems like it has enough spark. Checked fuel pump to see if it was pumping when running and it is. Not sure how much it should be flowing but it is definitely more than when not running. I'm kinda at a loss. Was thinking it may be the cam wore out but I looked to see if I could order one and I cannot find one for this atv. Seems they are discontinued. Also need and instrument cluster/speedo but they seem to be discontinued also. Any help would be great.
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