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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

S&S Cycle logo

S&S® 98" and 107" Big Bore Kits for 1999-up Big Twins

98" Big Bore Kits910-0481.png

No machining required! Ready to install! Superior wear and performance! Matches stock engine finish!


FITMENT:

  • 1999-2006 big twin

FEATURES & BENEFITS:

  • Cylinder and piston kits make going to the maximum bores size easy – no machining required
  • Stock engine height is maintained 
  • 11 fin cylinder design closely resembles OEM shape and come prefinished – ready to install 
  • Increased fin area for better heat dissipation
  • Centrifugal cast, gray iron liner features 40,000 psi tensile strength – superior wear and performance 
  • CP Pistons provide exceptional wear, performance and noise characteristics
  • Available in Wrinkle Black (WBlack) or Silver powder coat – matches stock engine finish

KIT CONTENTS:

  • S&S cylinders with gaskets 
  • Piston set with rings, wristpins and wristpin clips

 

S&S® 98" BIG BORE KIT SPECS

Year Stroke Bore Cylinder Length Piston Type Compression Ratio (with provided .045" head gasket)
83cc Heads 85cc Heads 87cc Heads 90cc Heads
1999-2006 4" 3.937" 4.937" Forged, 10cc Dome 10.5:1 10.3:1 10.1:1 9.8:1
Cylinder w/piston kits include pistons and cylinders that require no boring or honing.

 

This dyno chart shows the performance of a 2002 FLHR when equipped with a  98" Big Bore Kit, Tuned Induction System and Super Sidewinder 2 into 1 exhaust system. The Red curves show the combo with the 585 cams, CNC ported heads, and a 52mm throttle body. The Blue curves show the combo with 510 cams. The Black curves show an all stock configuration.






 

 

 

S&S® 98" Big Bore Kits

Cylinder Finish Part #
Silver Powder Coat 910-0482
Wrinkle Black Powder Coat 910-0481
Not legal for sale or use on CA or EPA pollution controlled motorcycles.

 

S&S® 3.937" Bore Forged Piston Kit

Displacement Deck Height Stroke Standard
98" 1.265" 4" 920-0101

 

S&S® 3.937" Bore Forged Cylinder

Displacement Silver Wrinkle Black
98" Front or Rear 910-0478 910-0477

 

 

107" Big Bore Kits910-0481.png

FITMENT:

  • 2007-2014 big twin (except 2014 Twin-Cooled® models)

FEATURES & BENEFITS:

  • Largest bore (3.937") that can be fit in a stock engine case
  • Cylinder and piston kits make going to the maximum bores size easy – no machining required
  • Stock engine height is maintained
  • 11 fin cylinder design closely resembles OEM shape and come prefinished – ready to install
  • Increased fin area for better heat dissipation
  • Centrifugal cast, gray iron liner features 40,000 psi tensile strength – superior wear and performance
  • CP Pistons provide exceptional wear, performance and noise characteristics
  • Available in Wrinkle Black (WBlack) or Silver powder coat – matches stock engine finish

KIT CONTENTS:

  • S&S cylinders with gaskets
  • Piston set with rings, wristpins and wristpin clips

 

S&S® 107" BIG BORE KIT SPECS

Year Stroke Bore Cylinder Length Piston Type Compression Ratio (with provided .045" head gasket)
83cc Heads 85cc Heads 83cc Heads 90cc Heads
2007-2014 4-3/8" 3.937" 4.937" Forged, 3cc Dome 10.6:1 10.4:1 10.2:1 9.9:1
Cylinder w/piston kits include pistons and cylinders that require no boring or honing.

 

 

This dyno chart shows the performance of a 2012 FLHX when equipped with a 107" Big Bore Kit, Stealth Air Cleaner and Super Sidewinder 2 into 1 exhaust system. The Red curves show the combo with the MR103 cams. The Blue curves show the combo using high compression, 635HO cams,CNC ported heads, and a 58mm Throttle Hog throttle body. The Black curves show an all stock configuration.





 
 
 
 

 

S&S® 107" Big Bore Kits

Cylinder Finish Part #
Silver Powder Coat 910-0480
Wrinkle Black Powder Coat 910-0479
Not legal for sale or use on CA or EPA pollution controlled motorcycles.

 

S&S® 3.937" Bore Forged Piston Kit

Displacement Deck Height Stroke Standard
107" 1.085" 4-3/8" 920-0100

 

S&S® 3.937" Bore Forged Cylinder

Displacement> Silver Wrinkle Black
107" Front or Rear 910-0478 910-0477