09-20 BMW S1000RR/HP4 Driven Racing 520 Front Sprocket
Driven Racing Steel 520 Front Sprocket Driven front sprockets are made out of case hardened chromoly steel and machined to exact dimensions Heat treated for greater surface strength Hard anodized for protection against corrosion All sprockets are machined to tolerances no greater than 0.2mm, which is less than half OEM standards 2009-2011 BMW S1000RR OEM Specs Front Sprocket - 17t Rear Sprocket - 44t Chain - 525 Pitch/118...