KB Performance, 3-5/8 big bore forged piston kit. STD - 48-84 Pan, Shovel. With 3-5/8 big bore cylinders (NU) 561820 MOUNTS JIFFY

MOUNTS JIFFY

Note: Use 980656 (chrome) or 980644 (black) adapter for H-D models

with flat style tappet screws which will fit this late (flat) style tappet guide

can be used with earlier 18mm sensor style exhausts

The gas tank is ready for a thread gas cap like on newer Harley-Davidson® models

KB Performance, 3-5/8 big bore forged piston kit. STD - 48-84 Pan, Shovel. With 3-5/8 big bore cylinders (NU) 561820 MOUNTS JIFFYForged 3 5 8 big bore piston set. Used with 3 5 8" big bore cylinders with 5. 330" (stock) to 5. 530" (+. 200") length. Must use 4 1 4" (stock) (88"), 4 1 2" (93'"), 4 5 8" (96") to 4 3 4" (98") stroker flywheels. 8. 50: 1 CR with 117cc head, 4. 250" stroke & Std. cyl. length. 9. 38: 1 CR with 117cc head & 4. 750" stroke & Std. cyl. length. Piston weight 440gr. Piston pin weight 97gr. Piston pin dia. . 791" offset. Head type: Dome with 42. 3cc.