2015 850sp- just had all fluids replaced and new belt put on through a dealer (keepin up on maintenance). Put 25 miles on Friday, early into Saturdays ride whne I let off the throttle something wouldn't disengage, or something would engage and almost put me over the handle bars with the amount of drag created. Could get "it" to release with heavy throttle or reversing. Could ride for sometime and then as soon as I would come way down on RPM to make a corner or break for aobstacle, something would engage and Id almost go over the handle bars. At a loss her fella's Please advise.

 

I know it's a pain in the butt,but most dealer don't take the machines outside and blow out accumulated belt dust from the clutches especially around the drive clutch one way and outer spider and shaft. Doing this along with concentrating air between the rear clutch sheaths will probably make a cloud of dust. That may solve the problem on the aggressive engine braking.