Cylinders & Pistons - Evo | Birds Bitz http://birdsbitz.com.au/product-category/engine/cylinders-pistons/cylinders-pistons-evo/ Aftermarket Harley Davidson Parts Store | Motorcycle Parts Brisbane | Birds Bitz Wed, 03 Jun 2026 15:17:05 +0000 en-AU hourly 1 https://wordpress.org/?v=6.8.5 https://birdsbitz.com.au/wp-content/uploads/2020/08/logo-150x110-1-100x100.png Cylinders & Pistons - Evo | Birds Bitz http://birdsbitz.com.au/product-category/engine/cylinders-pistons/cylinders-pistons-evo/ 32 32 KPM Hi-Performance Cylinder Stud Set. Fits Evo Big Twin 1985-1999 https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/kpm/ Sun, 10 May 2026 15:04:29 +0000 https://birdsbitz.com.au/online-shop/uncategorised/kpm/ KPMI Cylinder Studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel. When you want a stud that meets proof-stress and maximizes clamping force, look no further. KPMI in.rollsin. the threads, heat treats and then centerless grinds the entire body of the stud. Rolling the threads creates the toughest […]

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]]> KPMI Cylinder Studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel. When you want a stud that meets proof-stress and maximizes clamping force, look no further. KPMI in.rollsin. the threads, heat treats and then centerless grinds the entire body of the stud. Rolling the threads creates the toughest and strongest thread possible and centerless grinding removes notch sensitivity. The final process for all KPMI Studs is to encase the entire stud with premium corrosion resistant treatment of Black Oxide.

* Replaces OEM # 16837-85

Suggested Additional Purchase:

Head Bolt Kit # CM-2011-8, CM-2012-8 or FE-3005

*“On Line Shopping Only

The post KPM Hi-Performance Cylinder Stud Set. Fits Evo Big Twin 1985-1999 appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KPM Wristpin Bushing. Fits Big Twin 1936-1999 https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/kpm-wristpin-bushing-fits-big-twin-1936-1999/ Sun, 10 May 2026 15:03:01 +0000 https://birdsbitz.com.au/online-shop/uncategorised/kpm-wristpin-bushing-fits-big-twin-1936-1999/ Our Manganese Bronze wrist pin bushings continue to Perform under the most demanding conditions. These bushings are made to exact tolerances and will meet or exceed fitment and wear ability of all other replacement style bushings available.* Sold as a PairOutside Diameter: 0.897in. / Std.Inside Diameter: 0.788in.Overall Length: 1.065in.* Replaces OEM # 24334-36 *“On Line […]

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]]> Our Manganese Bronze wrist pin bushings continue to Perform under the most demanding conditions. These bushings are made to exact tolerances and will meet or exceed fitment and wear ability of all other replacement style bushings available.

* Sold as a Pair

Outside Diameter: 0.897in. / Std.

Inside Diameter: 0.788in.

Overall Length: 1.065in.

* Replaces OEM # 24334-36

*“On Line Shopping Only

The post KPM Wristpin Bushing. Fits Big Twin 1936-1999 appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> S&S Pistons; 3-1/2in.x4-1/4in. Stroke Std w/Super Stk Heads (Pair) https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/s-3-1-2in-x4-1-4in-stroke-std-w-super-stk-heads-pair/ Sun, 02 Nov 2025 15:43:24 +0000 https://birdsbitz.com.au/online-shop/uncategorised/s-3-1-2in-x4-1-4in-stroke-std-w-super-stk-heads-pair/ *“On Line Shopping Only

The post S&S Pistons; 3-1/2in.x4-1/4in. Stroke Std w/Super Stk Heads (Pair) appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> *“On Line Shopping Only

The post S&S Pistons; 3-1/2in.x4-1/4in. Stroke Std w/Super Stk Heads (Pair) appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Piston Pin Bushing STD Fits Big Twin All Years (EXT Twin Cam) Replaces 24334-36 Made In USA https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/piston-pin-bushing-std-fits-big-twin-all-years-ext-twin-cam-replaces-24334-36-made-in-usa/ Tue, 23 Sep 2025 03:59:48 +0000 https://birdsbitz.com.au/online-shop/uncategorised/piston-pin-bushing-std-fits-big-twin-all-years-ext-twin-cam-replaces-24334-36-made-in-usa/ Piston Pin Bushing STD Fits Big Twin All Years (EXT Twin Cam) Replaces 24334-36 Made In USA

The post Piston Pin Bushing STD Fits Big Twin All Years (EXT Twin Cam) Replaces 24334-36 Made In USA appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Piston Pin Bushing STD Fits Big Twin All Years (EXT Twin Cam) Replaces 24334-36 Made In USA

The post Piston Pin Bushing STD Fits Big Twin All Years (EXT Twin Cam) Replaces 24334-36 Made In USA appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Wrist Pin Bushes Fits 1936-1999 Bronze Replaces 24334-36 Sold Each https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/wrist-pin-bushes-fits-1936-1999-bronze-replaces-24334-36-sold-each/ Tue, 23 Sep 2025 03:52:44 +0000 https://birdsbitz.com.au/online-shop/uncategorised/wrist-pin-bushes-fits-1936-1999-bronze-replaces-24334-36-sold-each/ Wrist Pin Bushes Fits 1936-1999 Bronze Replaces 24334-36 Sold Each

The post Wrist Pin Bushes Fits 1936-1999 Bronze Replaces 24334-36 Sold Each appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Wrist Pin Bushes Fits 1936-1999 Bronze Replaces 24334-36 Sold Each

The post Wrist Pin Bushes Fits 1936-1999 Bronze Replaces 24334-36 Sold Each appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KEITH BLACK PISTONS +.030in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/keith-black-pistons-030in-dome-top-pistons-with-9-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Tue, 23 Sep 2025 00:56:19 +0000 https://birdsbitz.com.au/online-shop/uncategorised/keith-black-pistons-030in-dome-top-pistons-with-9-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Features & Benefits:-* Bore = 3.528in. * Stroke = 4.250in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 9.6:1 Compression Ratio with 80cc Head Chamber Volume.* Follow Ring End Gap […]

The post KEITH BLACK PISTONS +.030in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Features & Benefits:-

* Bore = 3.528in.

* Stroke = 4.250in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

Tech Tips:-

* 9.6:1 Compression Ratio with 80cc Head Chamber Volume.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

*“On Line Shopping Only

The post KEITH BLACK PISTONS +.030in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KEITH BLACK PISTONS +.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/keith-black-pistons-005in-flat-top-pistons-with-8-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Tue, 23 Sep 2025 00:56:19 +0000 https://birdsbitz.com.au/online-shop/uncategorised/keith-black-pistons-005in-flat-top-pistons-with-8-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Features & Benefits:-* Bore = 3.503in.* Stroke = 4.250in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.* Replaces OEM # 21941-83Tech Tips:-* 8.6:1 Compression Ratio with 80cc Head Chamber Volume.* Follow […]

The post KEITH BLACK PISTONS +.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Features & Benefits:-

* Bore = 3.503in.

* Stroke = 4.250in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

* Replaces OEM # 21941-83

Tech Tips:-

* 8.6:1 Compression Ratio with 80cc Head Chamber Volume.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

*“On Line Shopping Only

The post KEITH BLACK PISTONS +.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KEITH BLACK PISTONS +.005in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/keith-black-pistons-005in-dome-top-pistons-with-9-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Tue, 23 Sep 2025 00:56:19 +0000 https://birdsbitz.com.au/online-shop/uncategorised/keith-black-pistons-005in-dome-top-pistons-with-9-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Features & Benefits:-* Bore = 3.503in.* Stroke = 4.250in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 9.6:1 Compression Ratio with 80cc Head Chamber Volume.* Follow Ring End Gap & […]

The post KEITH BLACK PISTONS +.005in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Features & Benefits:-

* Bore = 3.503in.

* Stroke = 4.250in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

Tech Tips:-

* 9.6:1 Compression Ratio with 80cc Head Chamber Volume.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

*“On Line Shopping Only

The post KEITH BLACK PISTONS +.005in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KEITH BLACK PISTONS +.010in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/keith-black-pistons-010in-dome-top-pistons-with-10-51-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Tue, 23 Sep 2025 00:56:19 +0000 https://birdsbitz.com.au/online-shop/uncategorised/keith-black-pistons-010in-dome-top-pistons-with-10-51-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Features & Benefits:-* Bore = 3.508in. * Stroke = 4.250in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 10.5:1 Compression Ratio with 80cc Head Chamber Volume.* Follow Ring End Gap […]

The post KEITH BLACK PISTONS +.010in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Features & Benefits:-

* Bore = 3.508in.

* Stroke = 4.250in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

Tech Tips:-

* 10.5:1 Compression Ratio with 80cc Head Chamber Volume.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

*“On Line Shopping Only

The post KEITH BLACK PISTONS +.010in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> KEITH BLACK PISTONS +.010in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. https://birdsbitz.com.au/online-shop/engine/cylinders-pistons/cylinders-pistons-evo/keith-black-pistons-010in-flat-top-pistons-with-8-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Tue, 23 Sep 2025 00:56:19 +0000 https://birdsbitz.com.au/online-shop/uncategorised/keith-black-pistons-010in-flat-top-pistons-with-8-61-compression-ratio-fits-big-twin-1984-1999-with-evo-engine/ Features & Benefits:-* Bore = 3.508in.* Stroke = 4.250in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.* Replaces OEM # 21942-83Tech Tips:-* 8.6:1 Compression Ratio with 80cc Head Chamber Volume.* Follow […]

The post KEITH BLACK PISTONS +.010in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

]]> Features & Benefits:-

* Bore = 3.508in.

* Stroke = 4.250in.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

* Complete kit includes: two pistons, rings, wrist pins and clips.

* Replaces OEM # 21942-83

Tech Tips:-

* 8.6:1 Compression Ratio with 80cc Head Chamber Volume.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

*“On Line Shopping Only

The post KEITH BLACK PISTONS +.010in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

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