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Tuesday 2 February 2021

KB Performance Pistons

KB High Performance M-8 Pistons

Manufactured by United Engine and Machine, a new line of Super Duty KB Performance motorcycle pistons is available for 120"- 24" M-8 applications (2017 - current year Harley-Davidson models).

Available for Harley's 114" and 117" M-8s using stock cylinders bored to 4.125" (120" displacement) through 4.185" (124" displacement), they feature 11:1 compression "with generous valve pockets to accept 1 mm larger valves," according to Motorcycle Sales Manager Marko Glush.

"The M-8 hard anodized crown aids in heat deflection and corrosion from alcohol fuels. Additionally, the top ring groove hard anodizing eliminates micro-welding of the ring to the groove and maintains a flat and smooth surface for optimum ring seal.
"Premium crafted round wire locks keep the pin firmly in place. Sets include premium Hastings 1.2 mm, 1.2 mm and 3.0 mm ring sets, with a steel nitrile top ring with a ductile Napier second.
"These new M-8 series feature our popular Line2Line abradable coating as a standard option. Line2Line coating is applied to the thickness of the piston-to-wall clearance for a ZERO install clearance. The coating abrades-in on start-up to hone for the perfect fit per cylinder, eliminating piston rock for the best possible ring seal with no piston slap noise."
United Engine and Machine's KB Performance Motorcycle Pistons "has been designing and building high performance and original equipment pistons for nearly a century."