Mid-USA

Engine Crankcase, S & S Big Twin 1992/1999 Natural Finish
or higher performance applications or just a replacement for a worn out engine. These casesare compatible with the stock primary, charging system and all other stock components.

• Much stronger than stock crankcases in every aspect
• Includes bearings and installation hardware
• Clearanced for up to 5 strokes

1970/1984 Cases

• Clearanced for up to 38 amp stators

1984/1999 Cases

• Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at sustained high speeds
• A ported breather passageway and a machined breather window
• Crankcase breathing thru cases and heads

1999/2006 Cases

• Extra large front motor mount for increased strength
• Large cam chest allows for up to .675 cam lift
• Timken style sprocket shaft bearings
• Includes S & S crankcase breather reed valve to eliminate oil carry over and scavenging problems

S & S
Natural Finish Crankcase
Stock Bore
1992/1999 Style

Engine Crankcase, S & S Big Twin 1984/1991 Natural Finish
or higher performance applications or just a replacement for a worn out engine. These casesare compatible with the stock primary, charging system and all other stock components.

• Much stronger than stock crankcases in every aspect
• Includes bearings and installation hardware
• Clearanced for up to 5 strokes

1970/1984 Cases

• Clearanced for up to 38 amp stators

1984/1999 Cases

• Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at sustained high speeds
• A ported breather passageway and a machined breather window
• Crankcase breathing thru cases and heads

1999/2006 Cases

• Extra large front motor mount for increased strength
• Large cam chest allows for up to .675 cam lift
• Timken style sprocket shaft bearings
• Includes S & S crankcase breather reed valve to eliminate oil carry over and scavenging problems

S & S
Natural Finish Crankcase
Stock Bore
1984/1991 Style

Engine Crankcase, S & S Big Twin 1970/1984 Natural Finish
or higher performance applications or just a replacement for a worn out engine. These casesare compatible with the stock primary, charging system and all other stock components.

• Much stronger than stock crankcases in every aspect
• Includes bearings and installation hardware
• Clearanced for up to 5 strokes

1970/1984 Cases

• Clearanced for up to 38 amp stators

1984/1999 Cases

• Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at sustained high speeds
• A ported breather passageway and a machined breather window
• Crankcase breathing thru cases and heads

1999/2006 Cases

• Extra large front motor mount for increased strength
• Large cam chest allows for up to .675 cam lift
• Timken style sprocket shaft bearings
• Includes S & S crankcase breather reed valve to eliminate oil carry over and scavenging problems

S & S
Natural Finish Crankcase
Stock Bore
1970/1984 Style