The 22mm upper clamp is part number 1SL-23435-00-00. Available at Rocky Mountain ATV for $123.19
The 22mm lower clamp is part number 33D-23340-00-00. Available at Rocky Mountain ATV for $402.15.
LINK: Rocky Mountain Parts Schematic
Note: ThumperTalk is currently not showing parts for 2014 thru 2016 Yamahas.
Note: The bar clamps are interchangeable between the 2015 and 2016.
Note: The 2016 YZ250F and YZ250FX are not effected by this problem.
The XTRIG ROCS clamp is a 20-22mm system, available for 22 or 28mm bars, flex or rigid mount.
LINK: XTRIG 20-22mm 2016 YZ450F ROCS
Additional Details and Test Rider Input on the 25mm offset
First Ride 2016 YZ450F - Dirt Rider Magazine
Transworld MX First Test - Input from Rich Taylor
VITAL MX - First Impressions - Users
Edited by DaveJ, August 20, 2015 - 01:24 PM.