KB, M8 114/117 to 120" big bore piston conversion kit. +.010"

Forged Super Duty series for Milwaukee Eight engines. With hard-anodised ring crown and top groove to reflect heat and prevent 'micro-welding' between ring and groove. The Line2Line self-lubricating, abradable powder coating technique allows zero-clearance installation; the final clearance will be 0.003". The piston creates its own perfect clearance during break-in; the coating automatically provides the tightest and best possible piston-to-cylinder fit, with no piston rock and the best possible ring sealing.
Note: Compatible with 114/117" M8 engines, the cylinder must be bored to the 4.125" big bore size. No case boring required, OEM weight so rebalancing is not required and works with the original 4.500" stroke.
Compression ratio: 10.9:1. (with 88.6cc cylinder head volume).
Piston weight: OEM.
Piston pin weight: 115 gr., offset: 0.025".
Piston: +1.9cc/Flat top.
Compression height: 1.083".
Ring set: 1.2mm 1.2mm 3.0mm.
4 1/8" bore / Original stroke 4.500".


Specifications


Brand
KB Performance Piston


Application
17-24 114" M8 (NU)


Sales unit
Kit


Material
Aluminium


Packaging weight
1.363 kg


HS Code
84099100


Motorcycle family
SOFTAIL, TOURING, TRIKE


Original name
KB, M8 114/117 to 120" big bore conv. piston set. +.010"