Replacement 45" Flathead piston kit. +.060" - 29-73 45" (750cc) Side Valves (NU) 510141 manufactured in the stock H-D

manufactured in the stock H-D Sportster style

Comes with washers

Inner aluminum lower stop

By boring the stock cylinders to the 3-7/8" big bore size you will increase engine capacity from 88" (1448cc) to 95" (1546cc)

OEM replacement reference 27136-90A

Replacement 45" Flathead piston kit. +.060" - 29-73 45" (750cc) Side Valves (NU) 510141 manufactured in the stock H-DCast aluminum OEM style pistons for a stock rebuild. Wil fit all 29 73 45" (750cc) Flathead models. Pistons include wrist pins, retainers and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components, prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow