Top end problems

[shift35]

Hi,  I have a 2002 Raptor 660.  No mods done except for an FMF pipe and a GYTR air filter.  Lately I have started having problems with it.  Everytime I get to the top end of every gear the machine starts cutting out as if it isnt getting any fuel.  The air filter is clean.  Any ideas what may be going on? 

[Spartan]

Did you rejet for those mods? Those do count as mods you know...

Oh and welcome to the site 

[Peelz]

Parking brake or clutch sensor shorting out? That idiots the timing