KB Pistons

Shovelhead 80ci FL,FLH,FX 1978–84 Stock Stroke Bore Stroke Rod Comp Hgt. Ring Pack EVO-SPORTSTER KNUCKLE, PAN & SHOVELHEAD EVOLUTION TWIN CAM ‘88 TWIN CAM ‘96 Shovelhead 88-98ci 1948–84 BIG BORE STROKER Bore Stroke Rod Comp Hgt. Ring Pack Part # Piston Head Type/CC 3.625 4.250 - 4.750 7.44 *1.285 2 - 1/16 **1.175 1 - 3/16 * KB928 Hemi Dome with -42.3cc ** KB658C Hemi Dome 9.0:1 with -42.3cc * KB929 Hemi Dome with -53.6cc ** KB659C Hemi Dome 10.2:1 with -53.6cc * KB930 Hemi Dome with -58.2cc KNUCKLE, PAN & SHOVELHEAD Knuckle, Pan and Shovelhead 74ci FL,FLH,FX 1941–79 Bore Stroke Rod Comp Hgt. Ring Pack Pin Part # Piston Head Type/CC Comp. Ratio with Head CC 3.437 3.969 7.440 1.450 2 - 1/16 1 - 3/16 KB931 Hemi Dome 8.5:1 with -47.6cc w/112cc Pin 97 KB932 Hemi Dome 9.0:1 with -52.7cc w/112cc Pin 97 2M6482 0791X216K Ring Set Pin # Replacement Parts Part # Piston Head Type/CC Hemi Dome with -47.4cc Hemi Dome with -58cc Comp. Ratio with Head CC 3.498 4.250 7.44 1.285 2 - 1/16 1 - 3/16 KB926 8.6:1 w/117cc Pin 97 KB927 9.5:1 w/117cc Pin 97 2M6127 0791X216K Ring Set Pin # Replacement Parts Pin Comp. Ratio w/ 117cc Head 8.5:1 to 9.4:1 9.5:1 to 10.5:1 10.0:1 to 11.5:1

Oversizes

.791 / Offset

STD .005 .010 .020 .030 .040 .050

.060 .070 .080

Gram Wgt.

Material

Notes

Piston 456

Forged

8.5:1 at -.085 deck

4032 Alloy clearance

Piston 470

Forged

9.0:1 at -.085 deck

4032 Alloy clearance

Lock #

Oil Ring Support

RRN-81

Not Used

Pin

Oversizes

.791 / Offset

STD .005 .010 .020 .030 .040

Gram Wgt.

Material

Notes

Piston 416

Forged

8.6:1 at -.085 deck

4032 Alloy clearance

Piston 449

Forged

9.5:1 at -.085 deck

4032 Alloy clearance

Lock #

Oil Ring Support

RRN-81

Not Used

Oversizes

.791 / Offset

STD .005 .010 .020 .030 .040

Gram Wgt.

Material

Notes

When used w/4.500” & 4.750” stroke longer cylinders or stroker plates must be used. Designed for stock length 5.330” cylinders and 4.500” stroke. Coated skirts. When used w/4.500” & 4.750” stroke longer cylinders or stroker plates must be used. Designed for stock length 5.330” cylinders and 4.500” stroke. Coated skirts. When used w/4.500” & 4.750” stroke longer cylinders or stroker plates must be used.

Piston 440

Forged 4032 Alloy

Pin 97

Piston 423

Forged 4032 Alloy

Pin 97

Piston 470

Forged 4032 Alloy

Pin 97

Piston 453

Forged 4032 Alloy

Pin 97

Piston 484

Forged 4032 Alloy

Pin 97

Replacement Parts

Ring Set

Pin #

Lock #

Oil Ring Support

2M5721

0791X216K

RRN-81

Not Used

Forged

12 | KB Pistons

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