My snowmobile is lacking power?
Its a 2000 Arctic Cat ZR600 EFI (Electronic Fuel Injection). I cant seem to get the engine above 6000 RPM. Compression tested at 110 PSI on both cylinders, I have spark on both cylinders and brand new sparkplugs, I know that both injectors are firing because I can run the engine on just one cylinder both on the left and the right side. I need some help. Does anyone have any ideas?

* 38 minutes ago
* - 4 days left to answer.

Additional Details

The compression is in specs according to arctic cat.

I cant get it above 6000 RPM even with the track in the air.