+.030in. Dome Top Pistons with 8.3:1 Compression Ratio. Fits Big Twin 1978-1984 with 1340cc Shovel Engine. - Keith Black Pistons

Features & Benefits:-

* Bore = 3.528"

* Stroke = 4.250"

* 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 # 21993-80

Tech Tips:-

* 8.3:1 Compression Ratio with 117cc 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.

Shipping costs are calculated at checkout. Check the Supplier Direct notice above, where shown, for additional delivery information.

View shipping policy

View returns policy

Need help choosing a size or checking a part? Email weborders@joerascal.com.au. For parts enquiries, include your motorcycle model and year.