Image is for Reference ONLY! Over 20 Years Technical Experience. Piston components/kits are subject to. NEED TO MEASURE YOUR CYLINDER BEFORE ORDERING. If you use the wrong size piston/piston rings, you will damage your cylinder and we will not be liable.Valve pocket designs allow maximum flow around the valve, allowing the use of oversized valves and high lift cams. Piston crown shapes are designed to promote the maximum intake charge efficiency through a scavenging mixture'Cross Flow' during intake and exhaust valve overlap. More fuel and air equals more horsepower. Piston domes are designed for optimal quench during the compression/ combustion cycle, resulting in resistance to detonation and pre-ignition. The end product is longer engine life and increased horsepower potential.
Precision machined ring grooves with proper orifice/ accumulator volume feature calculated groove root diameters and axial widths, providing excellent surface finish and flatness, maximum ring seal, and minimized blow-by and oil consumption. Harley Davidson Evo Big Twin 1340. Displacement: 1361cc Bore - Standard: 3.498in Bore - Actual: 3.528in Bore - Oversize. 030in Stroke: 4.250in Compression Ratio - Actual: 8.5:1 Dome Type: Flat Top Engine Type: 80ci Dome Volume: -1.5cc Valve Pocket Depth - Intake. 178in Valve Pocket Dia - Intake: 2.000in Valve Pocket Depth - Exhaust.
178in Valve Pocket Dia - Exhaust: 2.000in Sales Conditions: 9.5:1 w/ Screamin Eagle Heads. If this notice appears near the description image of this listing, then this item is NOT legal for use on emissions controlled vehicles in the state of California.
And are NOT calculated or imposed by us at any level. While we work continuously to keep these indications up to date, not all applicable models may be displayed. Please be careful in reading any/all fitment and size indications for exact Year-Make-Model-SubModel indications to make sure the part ordered will fit your exact application/s.
Product specific images displayed on listings will be provided IF available, and when not available, a generic (non-specific) image will be provided that represents the general product type listed. We have a very experienced and knowledgable support staff that can assist you with virtually any inquiry.