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High compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 10:1 Compression ratio. Piston weight 335gr. Piston pin diameter .792" and weight 97gr.
Head type: Dish.
Dome +10cc.
Compression height 1.210".
Bore 3.498".
Stroke 3.812".
Rod length 6.926".
Cyl. length 4.650".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.

KB Performance, 883-1200 big bore piston kit. +.040"

#944618

Stock:Yes

For 96" to 103" (3 3/4" to 3 7/8") big bore conversions. Used with stock heads and cylinders. By boring the stock cylinders from 3-3/4" to 3-7/8" big bore size engine capacity will increase from 96" to 103". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.
10.0:1 CR with 85cc head. Head type: Flat top.
+1.9cc / Compression height 1.076".
Bore 3.875" / Stroke 4.375".
Rod length 7.667".
Note: Top compression ring will need additional clearance. See instructions.

KB Performance, 96" to 103" big bore piston set. +.040"

#944761

Stock:Yes

Forged piston set. For 96" to 103" big bore conversion.
9.5:1 CR with stock 85cc head.
Piston weight 335gr.
Piston pin weight 89gr.
Piston pin dia. .927" / offset.
Head type: Dish with +6.9cc.
Compression height 1.076".
Bore 3.875".
Stroke 4.375" (4-3/8").
Rod length 7.667".
Cyl. length 4.938".

Note: 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 Performance, 96" to 103" Twin Cam piston kit. +.020"

#944817

Stock:Yes

Forged big bore conversion piston set. Used for converting 96" (3-3/4" bore) and 103" (3-7/8" bore) to 110" (4" bore) big bore. With dished piston domes. Works with all stock cylinder heads, 96" and 103" with 85cc chamber and SE, MVA and CVO with 95cc chambers.
9.5:1 CR with stock 96"/103" 85cc head.
Piston weight 350gr.
Piston pin weight 89gr.
Piston pin dia. .927" / offset.
Head type: Dish with +13.3cc.
Compression height 1.086".
Bore 4.000".
Stroke 4.375" (4-3/8").
Rod length 7.667".
Cyl. length 4.938".

Note: Will not work as bolt-in with OEM H-D 4" big bore conversion cylinders in OEM 96" & 103" crankcases. The cylinders will hit a small step in the crankcase. Also clearance between piston skirt and crankcase must be checked at bottom dead center. Cases with a large cast-in bump, just below the machined area for the cylinder sleeve, must be machined for adequate piston skirt to crankcase clearance. This is on both front & rear cylinder exhaust sides of the crankcase.
Note: Will not fit 110" CVO models.
Note: 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 Performance, 96"/103" to 110" Twin Cam piston kit. +.030"

#944823

Stock:Yes

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".
All KB 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.

Note; 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 the piston set, prior to installation.

KB Performance, 1340 Evo B.T. forged piston kit. STD

#944774

Stock:Yes

883-1200 conversion forged piston set. 10.1 CR with 51cc head. Works with unmodified 883 heads.
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".
All KB 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.

Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.

KB Performance, piston set +.030

#944784

Stock:Yes

Standard compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 9:1 stock compression ratio. Pistons are flat top, .125" below deck height, to achieve a 9:1 CR with a compression height of 1.090".
Piston weight 310gr. Piston pin diameter .792" and weight 97gr.
Head type: Flat top / Dome +0.5cc.
Compression height 1.090".
Bore 3.498" / Stroke 3.812".
Rod length 6.926" / Cyl. length 4.650".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.

KB Performance, 883-1200 big bore piston kit. +.040"

#944755

Stock:Yes

High compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 10:1 Compression ratio. Piston weight 335gr. Piston pin diameter .792" and weight 97gr.
Head type: Dish.
Dome +10cc.
Compression height 1.210".
Bore 3.498".
Stroke 3.812".
Rod length 6.926".
Cyl. length 4.650".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.

KB Performance, 883-1200 big bore piston kit. +.030"

#944617

Stock:Yes

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".
All KB 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.

Note: 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 the piston set, prior to installation.

KB Performance, 1340 Shovel forged piston kit. +.030"

#944800

Stock:Yes

Forged piston set. 8.5:1 CR with 112cc head. Standard replacement.
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".
All KB 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 Performance, 1200cc B.T. forged piston kit. STD

#944786

Stock:Yes

883-1200 conversion forged piston set. 10.1 CR with 51cc head. Works with unmodified 883 heads.
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".
All KB 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.

Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.

KB Performance, piston set +.040

#944785

Stock:No

Forged piston set. For 96" (3-3/4") to 103" (3-7/8") big bore conversion.
9.5:1 CR with stock 85cc head.
Piston weight 335gr.
Piston pin weight 89gr.
Piston pin dia. .927" / offset.
Head type: Dish with +6.9cc.
Compression height 1.076".
Bore 3.875".
Stroke 4.375" (4-3/8").
Rod length 7.667".
Cyl. length 4.938".

Note: 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 Performance, 96" to 103" Twin Cam piston kit. +.030"

#944818

Stock:Yes

Forged piston set. 8.5:1 CR with 112cc head. Standard replacement.
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".
All KB 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 Performance, 1200cc B.T. forged piston kit. +.080"

#944795

Stock:Yes

For 96" to 103" (3 3/4" to 3 7/8") big bore conversions. Used with stock heads and cylinders. By boring the stock cylinders from 3-3/4" to 3-7/8" big bore size engine capacity will increase from 96" to 103". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.
10.0:1 CR with 85cc head. Head type: Flat top.
+1.9cc / Compression height 1.076".
Bore 3.875" / Stroke 4.375".
Rod length 7.667".
Note: Top compression ring will need additional clearance. See instructions.

KB Performance, 96" to 103" big bore piston set. +.005"

#944757

Stock:No

High compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 10:1 Compression ratio. Piston weight 335gr. Piston pin diameter .792" and weight 97gr.
Head type: Dish.
Dome +10cc.
Compression height 1.210".
Bore 3.498".
Stroke 3.812".
Rod length 6.926".
Cyl. length 4.650".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.

KB Performance, 883-1200 big bore piston kit. +.020"

#944616

Stock:Yes

Pop-up high compression. 9.5:1 CR. Piston weight 392gr. Piston pin weight 97gr.
Head type: Dome.
Dome -9cc.
Compression height 1.375".
Bore 3.4980".
Stroke 4.250" (4 1/4").
Rod length 7.440".
Cyl. length 5.550".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.
Note: Top compression ring will need additional clearance. See instructions.

KB Performance, 1340cc Evo B.T. pop-up piston kit. +.040"

#944670

Stock:Yes

Standard replacement piston set. Stock 9.0:1 compression ratio.
Piston weight 253gr. Piston pin weight 77gr.
Head type: Flat top / Dome +1.2cc.
Compression height 1.210".
Bore 3.00" / Stroke 3.812".
Rod length 6.926" / Cyl. length 4.650".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.

KB Performance, XL883 piston kit. +.010"

#944736

Stock:No

High compression pop-up piston set. 9.5:1 CR. Piston weight 388gr. Piston pin weight 97gr.
Head type: Dome / Dome -47cc.
Compression height 1.285" / Bore 3.4980".
Stroke 4.250".
Rod length 7.440" / Cyl. length 5.330".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.

KB Performance, 1340cc Shovel pop-up piston kit. +.040"

#944658

Stock:Yes

Compatible with stock cylinders and heads, gives stock compression ratio. 8.5:1 CR. Piston weight 370gr. Piston pin weight 97gr.
Head type: Dome 0.656" / Dome -57cc.
Compression height 1.450".
Bore 3.4375" / Stroke 3.969" (3-31/32").
Rod length 7.440" / Cyl. length 5.330".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.

KB Performance, 1200cc B.T. piston kit. +.070"

#944639

Stock:Yes

High compression pop-up piston set. 9.5:1 CR. Piston weight 388gr. Piston pin weight 97gr.
Head type: Dome / Dome -47cc.
Compression height 1.285" / Bore 3.4980".
Stroke 4.250".
Rod length 7.440" / Cyl. length 5.330".
Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise.

Note: Top compression ring will need additional clearance. See instructions.
Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.

KB Performance, 1340cc Shovel pop-up piston kit. +.005"

#944654

Stock:Yes