MONSTER SPORT-M18 Bore Up Piston Kit for HT81S

Displacement of M16A becomes 1,770cc from 1,490cc, keeping same stroke.
Performance, strength, weight and shape have confirmed by 3D computer simulation.

*This part is need sub-computer re-setting.
*It is necessary cylinder block processing in order to install.
*This item is for Racing.

Part name		Part number	Price	Model	Buy Online
M18 Bore Up Piston Kit	NA high compression	139500-4350M	Discontinued	Swift Sport HT81S
M18 Bore Up Piston Kit	Turbo/Super charger	139560-4350M	Discontinued	Swift Sport HT81S

-Specification

Displacement.		1,770cc
		[Standard 1,490cc]
Bore × stroke		85mm×78mm
		[Standard 78mm×78mm]
Compression [With high compression cylinder head.]	NA high compression	12.2[Standard 11.1]
	Turbo・Super charger	10.5[Standard 11.1]


Attachments		φ85 Forged piston×4
		Piston ring set×4
		Piston pin×4
		Circlip×8
		Sleeve×4
		Head gasket×1