2008 m1000 bogging

[Rodgod87]

Hey
I have a 2008 m1000 it runs and idles fine at low rpm. After 4000 rpm and over it loses power. Not to sure where to start.
Any suggestions would be appreciated. Thanks

 

[jim]

Check power valves/cables for function and synchronization. If they aren't opening, no power. Powervalves should cycle once when you start. I also had an issue on my M1 before related to the PV servo mounting.

Could also be clutching issue, but not as likely because a bad primary is obvious (won't work and then breaks) while a stuck secondary will over-rev and/or stick open.

But, more detail would give us a better idea. Does it rev to 7800, but just no power? Any codes? Does this on the trail and off-terrain? Any major modifications?