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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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Crankcase Assembly

 
$1,759.95
SKU:
106-4041
Qty:
 
Dealer Only Item

 
 
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Description
Product Reviews
Specs
Fitment
Instructions
These 4 inch bore crankcases have the stock bolt pattern for use with S&S 4" bore cylinders. Compatible with the stock primary, charging system and all other stock components and bolt directly to the stock transmission on all models.

Features and Benefits
  • Much stronger than stock crankcases, extra large front motor mount for increased strength
  • 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" Bore (Stock Stud Pattern)
  • 1999 - 2006 Big Twins (except 2006 Dyna®)
  • Oil Line Kit Required
    Silver finish
    Also available in Black finish 31-0175
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