450r problems

[dvsmnd]

all of a sudden my 450 bogs out and wants to stall when riding with the throttle about 3/4 of the way open. i have only put on a wb exuast and k&n filter, but i switched back to stock and it still does it. can anyone help?:confused:

[416rider]

Did you jet it I noticed same thing before I jetted my 450r with the pipe and K&N. :confused:

[dvsmnd]

i didnt jet it yet, but it does the same thing with the stock pts.:confused:

[dvsmnd]

i just went out and put in a 180 jet and problem solved