1. The spiral retainer comes unsprung. KB suggests that you slightly spring the retainer about 1/2in.-3/4in. by grasping both ends and stretching it. This will help with installation.

2. Installation of the retaining ring. Place the end of the retaining ring into the retaining ring groove in the piston. Using a small screwdriver press the retaining ring in place. Move around the pinhole in a circular pattern to spiral the complete retainer into the groove. Make sure the retainer is completely in the groove as it will unwind and lead to failure.

* SOLD AS A SET OF 4

*“On Line Shopping Only

The post KEITH BLACK PISTONS Replacement Piston Pin Spiral Locks – Pack of 4. Fits KB Twin Cam Pistons appeared first on Birds Bitz Motorcycle Parts & Accessories.

1. The spiral retainer comes unsprung. KB suggests that you slightly spring the retainer about 1/2in.-3/4in. by grasping both ends and stretching it. This will help with installation.

2. Installation of the retaining ring. Place the end of the retaining ring into the retaining ring groove in the piston. Using a small screwdriver press the retaining ring in place. Move around the pinhole in a circular pattern to spiral the complete retainer into the groove. Make sure the retainer is completely in the groove as it will unwind and lead to failure.

* SOLD AS A SET OF 4

*“On Line Shopping Only

The post KEITH BLACK PISTONS Replacement Piston Pin Spiral Locks – Pack of 4. Fits KB Shovel, Evolution & Sportster Pistons appeared first on Birds Bitz Motorcycle Parts & Accessories.

*“On Line Shopping Only

The post KEITH BLACK PISTONS Replacement Piston Pin Lock – Pack of 4. Fits KB Milwaukee-Eight Pistons appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.508in.

* Stroke = 3.812in.

* 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:-

* Piston is 0.125in. below deck to achieve 9.1:1 Compression.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the suppliedManufacturers 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 9.1:1 Compression Ratio. Fits Sportster 1986-2003 with Big Bore 883cc to 1200cc Conversion. appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.218in.

* Stroke = 3.812in.

* Fits Iron Head Sporty.

* 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 # 22255-83

Tech Tips:-

* 8.2:1 Compression Ratio with 110cc Head Chamber Volume.

* Follow RingEnd 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 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine.</P><P></P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.238in.

* Stroke = 3.812in.

* Fits Iron Head Sporty.

* 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 # 22257-83

Tech Tips:-

* 8.2:1 Compression Ratio with 110cc Head Chamber Volume.

* Follow RingEnd 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 +.050in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine.</P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.498in.

* Stroke = 3.812in.

* 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:-

* Piston is 0.125in. below deck to achieve 9.1:1 Compression.

* Follow Ring End Gap & Piston to Cylinder Clearances as per the suppliedManufacturers 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 Std Flat Top Pistons with 9.1:1 Compression Ratio. Fits Sportster 1986-2003 with Big Bore 883cc to 1200cc Conversion. appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.508in.

* Stroke = 3.812in.

* 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 # 22216-88A

Tech Tips:-

* 9.0:1 Compression Ratio with 69cc 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 9.0:1 Compression Ratio. Fits Sportster 1986-2021 with 1200cc Engine & Sportster 1986-1987 with 1100cc Engine.</P><P></P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Bore = 3.518in.

* Stroke = 3.812in.

* 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 # 22220-88A

Tech Tips:-

* 9.0:1 Compression Ratio with 69cc 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 +.020in. Flat Top Pistons with 9.0:1 Compression Ratio. Fits Sportster 1986-2021 with 1200cc Engine & Sportster 1986-1987 with 1100cc Engine.</P><P></P><P> appeared first on Birds Bitz Motorcycle Parts & Accessories.

* Hypereutectic Alloy is a cast 16% silicon content material

* Perfect for air cooled engines

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

Tech Tips:-

* 9.0:1 Compression Ratio with 69cc 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 arerequired 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 Std Flat Top Pistons with 9.0:1 Compression Ratio. Fits Sportster 1986-2021 with 1200cc Engine & Sportster 1986-1987 with 1100cc Engine. appeared first on Birds Bitz Motorcycle Parts & Accessories.