As Terms of Service go. . . . I have seen worse. . . . :
http://yamalubeadvantage.com/globalassets/yamalube-engine-warranty.pdf
"A Qualified Breakdown does not include the reduction in operating performance due to lack of maintenance and/or wear and tear, including a reduction in engine compression due to worn rings or valves, or abnormal sounds such as “knocking,” “pinging” or “rattling” sounds when a breakdown has not occurred.
COVERED PARTS means “Oil Wetted” engine parts, including pistons, piston rings, piston pins, crankshaft, main bearings, connecting rods, rod bearings, camshaft, camshaft bearings, timing chain and gears, intake and exhaust valves, valve springs, guides, oil pump, push rods, rocker arms, lifters and rocker arm shafts. The engine block and cylinder heads are also Covered Parts if mechanical failure was caused by a failure of the above listed Covered Parts. Covered Parts does not include the following: (1) all fuel system parts; (2) all ignition, starting and electrical system parts; (3) turbocharger and supercharger systems; and (4) all exhaust pipes, muffler, catalyst and related system parts; and (5) all transmission, drive train and clutch related system parts. This Limited Warranty covers no other parts. Replacement will be made with a part that is of a like kind and quality (i.e. new, remanufactured or used part) compatible with the original design specifications and wear tolerances of the Qualified Product.
COVERED LABOR means flat rate labor costs, at a qualified Yamaha dealer only, according to such dealer’s approved labor rate for repair or replacement of the Covered Parts. This Limited Warranty covers no other labor.
FAIR MARKET VALUE means an amount equal to the private sale value of the Qualified Product on the date of a Qualified Breakdown as set forth by N.A.D.A. (National Automobile Dealers Association) or some other similar listing of product values if a N.A.D.A. value was not available. "