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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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Crankcase Assembly for 1999–'06 Big Twins (except 2006 Dyna®)

 
 
 
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These 4-1/8 inch bore crankcases have the stock bolt pattern. For use with S&S 4-1/8 inch bore cylinders such as the S&S 124 Hot Set Up Kit®. Compatible with the stock primary, charging system and all other stock components and bolt directly to the stock transmission on all models

 

  • Large cam chest allows cam lift up to .675" without clearancing
  • Timken® style sprocket shaft bearings withstand the most demanding applications
  • Includes S&S crankcase breather reed valve to eliminate oil carry-over and oil scavenging problems
  • Clearanced for strokes up to 5"
  • All passages between crankcase cam support plate are o-ring sealed
  • Includes pinion bearing
  • 4 1/8" Bore (Stock Stud Pattern)
  • 1999 - 2006 Big Twins (except 2006 Dyna®)
  • Choose Silver, Black, or Polished Finish



Silver. . . . 106-4057
Black. . . .31-0181
Polished. . . .31-0182

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