BMW Service - Cam Chain Tensioner Replacement

Replacing the cam chain tensioner on a 2002 R1150RT *** I DO NOT SELL MAIL-ORDER PARTS *** These are spring 2013 BMW dealer retail prices in the USA 11 31 7 688 629 Cylinder, Left $30 11 31 7 656 922 Piston, Left $60 07 11 9 963 308 Gasket Ring size = 18 X 22 mm copper or aluminum $.50 *** I do not sell mail-order parts. ***