KB Pistons

TWIN CAM 96”

Twin Cam 103” / Big Bore 96” 2007–Present Stock Stroke Bore Stroke Rod Comp Hgt. Ring Pack Pin EVO-SPORTSTER KNUCKLE, PAN & SHOVELHEAD EVOLUTION TWIN CAM ‘88 TWIN CAM ‘96 Twin Cam 110” / Big Bore 96” 2007–Present Stock Stroke Bore Stroke Rod Comp Hgt. Ring Pack Pin Part # Piston Head Type/CC Comp. Ratio with Head CC 4.000 4.375 7.667 1.076 2 - 1.5mm 1 - 2.5mm KB913C Dish with 9.5:1 +13.3cc w/85cc Pin 89 KB914C Dish with 10.0:1 +7.1cc w/85cc Pin 89 KB915C Flat Top with 10.5:1 +1.8cc w/85cc Pin 89 * KB661C Dome with 10.0:1 -4.2cc w/95cc Pin 88 2M5080 0927X208K Ring Set Pin # Replacement Parts Part # Piston Head Type/CC Dish with Comp. Ratio with Head CC 3.875 4.375 7.667 1.076 2 - 1.5mm 1 - 2.5mm KB907C 9.5:1 +6.9cc w/85cc Pin 89 KB908C Flat Top with 10.0:1 w/85cc +1.9cc Pin 89 KB909C Dome with 10.5:1 w/85cc -3.6cc Pin 89 * KB660C Dome with 10.0:1 w/95cc -9.8cc 2M4941 0927X208K Ring Set Pin # Replacement Parts

Oversizes

.927 / Offset

STD .005 .010 .020 .030

Gram Wgt.

Material

Notes

Piston 335

Coated Forged

4032 Alloy

See instructions for coated piston clearances.

Piston 317

Coated Forged

4032 Alloy

Piston 335

Coated Forged

4032 Alloy

Coated Forged *Designed for

Piston 369 Pin 106

Screamin’ Eagle 95cc Heads

4032 Alloy

Lock #

Oil Ring Support

PRJ100-3

Not Used

Oversizes

.927 / Offset

STD .005 .010 .020 .030

Gram Wgt.

Material

Notes

Piston 350 Coated Forged

Stock 96” case must be machined for 4” bore cylin- ders. Direct replacement pistons for factory 110” engines.

4032 Alloy

Piston 356

Coated Forged

4032 Alloy

Piston 354

Coated Forged

4032 Alloy

Coated Forged *Designed for

Piston 397

Screamin’ Eagle 95cc Heads

4032 Alloy

Lock #

Oil Ring Support

PRJ100-3

Not Used

Twin Cam 117”, next page …

Forged

14 | KB Pistons

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