MCS Sprocket Shafts Bearing Spacers

25 products — part of all Sprocket Shafts Bearing Spacers

MCS sprocket shaft bearing spacers maintain the correct running clearances between the sprocket shaft bearings in Harley-Davidson primary systems, preventing end-float and keeping the primary chain and compensator running smoothly. These precision-machined spacers are a small part with an outsized effect on primary operation — incorrect spacer thickness creates either excessive bearing play or pre-loading that accelerates bearing wear and generates noise and vibration inside the primary chaincase. MCS supply their bearing spacers to Harley-Davidson specifications, covering Big Twin applications where the sprocket shaft runs in roller or ball bearings retained by a specific spacer stack. During any primary rebuild or bearing replacement, fitting fresh spacers alongside new bearings ensures the entire assembly is within specification. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, carries MCS sprocket shaft components alongside a comprehensive engine and primary parts range. Precision internal components like these are what separate a properly rebuilt primary from one that simply goes back together. Browse the full MCS Sprocket Shafts Bearing Spacers range below.