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These are on original Sears backing and include the mounting screws
Short stroke for the A
Puch stud pattern is close enough to many other models to fit with a little work
Some have vacuum ports plugged with a bolt/gasket
16 with cable choke
Yamaha YZ85 (02-18) Athena 53mm "105cc" Cylinder Kit z50 These are on original SearsBig bore kit for 2002 2018 Yamaha YZ85. This cylinder kit from Athena increases the bore diameter to 53mm which is roughly 105cc of displacement. This cylinder features a nickel carbide coating on the aluminum cylinder to increase durability. The forged piston comes molybdenum coated for longer wear life. The water jacket of the cylinder is improved from the stock design for increased flow rate. This does not require the use of a stroker crank like
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