This is an aftermarket crank engine unless you want quoted on oem crank.
THE 850 HAS MAVERICK HEADS. WHEN YOU HAVE AN 850 THE CHAIN TENSIONERS ARE IN THE CYLINDERS AND OUR 860 DOES NOT HAVE THIS SO WE PUT THEM IN THE HEADS. THIS DOES NOT HURT OR AFFECT ANYTHING FOR FITMENT. THE 850 AND 860 MATH WISE ARE ALMOST IDENTICAL AND WILL BE A