Yamaha F1ZR racing crankshaft / kruk as F1ZR for Indonesian performance brands and wholesalers. Stroke options: 52, 53, 53.6, 54 and 54.5 mm; Stroke Up +0.8 mm / Total +1.6 mm; Stroke Up +1 mm / Total +2 mm; and custom stroke. OEM/ODM available. MOQ: 300 pieces.