Speedo Seats & Luggage- racks Frame Chassis Suspension Forktubes Wheels Brake Fenders Gastanks Motorparts Gaskets Intake Transmission & Driveline Exhaust Electrical & Lights Handlebars, Cables & Mirrors Oil tanks Oil & Chemicals Fasteners Windshields Forward controls, Footpegs Miscellaneous MOTOR PARTS - TOP END 10 676 NEW PRODUCTS ADDED WEEKLY AT / MOTORCYCLESTOREHOUSE.COM KB FORGED PISTONS 99-06 88" TO 95" TWIN CAM BIG BORE CONVERSION (KB904C) 88" (3-3/4") to 95" (3-7/8") big bore conversion forged piston set. 9.25:1 CR with 85cc head / Piston weight 350gr. Piston pin weight 89gr. / Piston pin dia. .927" / offset. Head type: Dome with -6.7cc. Compression height 1.263". Bore 3.875" / Stroke 4.000". Rod length 7.667" / Cyl. length 4.938". 944808 Std. 944809 .005" 944810 .010" 944811 .020" 944812 .030" 944813 .040" 944808 84-99 1340CC EVO B.T. (KB920) Forged piston set. 9.5:1 CR with 80cc head / Piston weight 365gr. Piston pin weight 97gr. / Piston pin dia. .792" / offset. Head type: Dome with -8.5cc. Compression height 1.375". Bore 3.4980" / Stroke 4.250". Rod length 7.440" / Cyl. length 5.550". 944774 Std. 944775 .005" 944776 .010" 944777 .020" 944778 .030" 944779 .040" 944774 79-84 1340CC SHOVEL (KB926) Forged piston set. 9.0:1 CR with 112cc head / Piston weight 416gr. Piston pin weight 97gr. / Piston pin dia. .791" / offset. Head type: Dome with -52.7cc. Compression height 1.285". Bore 3.498" / Stroke 4.250". Rod length 7.440" / Cyl. length 5.330". 944796 Std. 944797 .005" 944798 .010" 944799 .020" 944800 .030" 944801 .040" 41-78 1200CC KNUCKLE, PAN, SHOVEL (KB931) Forged piston set. 8.5:1 CR with 112cc head / Piston weight 456gr. Piston pin weight 97gr. / Piston pin dia. .791" / offset. Head type: Dome with -47.6cc. Compression height 1.450". Bore 3.437" / Stroke 3.969". Rod length 7.440" / Cyl. length 5.330". 944786 Std. 944787 .005" 944788 .010" 944789 .020" 944790 .030" 944791 .040" 944792 .050" 944793 .060" 944794 .070" 944795 .080" 944796 944786 48-84 88" TO 98" PAN, SHOVEL BIG BORE / STROKER (KB928) Forged 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 / Compression height 1.285". Bore 3.625" / Stroke 1.250" to 4.750". Rod length 7.440" / Cyl. length 5.530" Std to +.200" higher. Note: Stock 5.330" cylinders can be used with stock 4-1/4" stroke. Longer strokes require correct length longer cylinders or stroker plates to achieve the desired compression ratio. 944802 Std. 944803 .005" 944804 .010" 944805 .020" 944806 .030" 944807 .040" 86-22 883-1200CC XL CONVERSION (KB924C) Forged piston set. 10.1 CR with 51cc head / Piston weight 337gr. Piston pin weight 97gr. / Piston pin dia. .791" / offset. Head type: Dish with +9.8cc / Compression height 1.280". Bore 3.498" / Stroke 3.812" / Rod length 6.926" / Cyl. length 4.650". Note: For 04-22 XL models 1200cc cylinders must be used. The stock 04-22 883 cylinder liners are too thin for boring to 1200 size. 944780 Std. 944781 .005" 944782 .010" 944783 .020" 944784 .030" 944785 .040" 944802 944780 KB FORGED PISTONS All Keith Black forged pistons are made from 4032 alloy, a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level, after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation, or pre-ignition, giving the best resistance to cracking. Although 4032 has a low expansion rate, it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001" wider piston to wall clearance. Pistons are sold as sets, complete with wrist pin retaining rings, wrist pins and piston rings. Please note that all KB forged pistons come equipped with offset wrist pins / piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions, as provided with each piston set, prior to installation. KB PISTONS, REPLACEMENT PARTS Standard replacement piston wrist pins and piston circlips for all KB pistons. 944730 Piston pin .792". All KB pistons, excl. TC 944732 Piston pin .927". KB344 series & all Twin Cam pistons (excl. KB343 & KB399 series) 944733 Piston pin .927". KB343 & KB399 series for 88" Twin Cam pistons only 944731 Lockring, for .792" piston pins 944734 Lockring, for .927" piston pins 944731 944730
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