We have a couple sets of the "limited Edition" blue triple clamps in stock from ride engineering. These are 21.5mm offset for the 2013 KXF 250 and 450. These are the most common aftermarket offset they sell for this bike. I just talked to the guys at Ride Engineering at length about these clamps and they informed me that this is what the Hare and Hound guys run and their motocross guys run these as well.
http://www.powersportjunkie.com/rid...f-kx250f-triple-clamps-p/kx-tbk20-m3-blue.htm
These are for the 06-12
http://www.powersportjunkie.com/rid...x250f-triple-clamps-p/re-kx-tbk20-mb-blue.htm
http://www.powersportjunkie.com/rid...f-kx250f-triple-clamps-p/kx-tbk20-m3-blue.htm
These are for the 06-12
http://www.powersportjunkie.com/rid...x250f-triple-clamps-p/re-kx-tbk20-mb-blue.htm