129" power pack

Big-bore bolt-on kit increases 107" M8 to 129" without requiring crankcase machining
4.32" diameter cylinders with forged pistons and 11.0:1 compression ratio
S&S oil pump/cam plate with blue anodised finish
Removable drain plugs for maintenance
Independent sump sections for the crankcase and camshaft housing.
Debris filter on both suction ports
Magnet in the camshaft sump to prevent debris from entering the oil pump.
Greater oil flow capacity in both supply and return
Adjustable pressure relief valve adjustable with the unit installed on the engine
Quickee pushrods
S&S premium studs
Black anodised S&S tappet cuffs, manufactured from billet aluminium
S&S 550 cams designed for big bore applications
S&S valve springs compatible with cams up to 0.605" lift
High-performance single-wire conical spring design
Manufactured in the USA
Compatible with VVT models.
Not suitable for any Trike model.
Intake cover/rocker cover gaskets not included.



Specifications


Brand
S&S CYCLE


Supplier reference
310-1226D


Features
Black pushrods, timing chain tensioner


Engine capacity
129"


Colour/finish
Non-ribbed, Black Wrinkle


Cylinder Dimensions
4,320"


Style
550C


Stroke length
4,375"


Model
Performance Kit


Product name
Power Package


Compression ratio
11,0:1


Cooling system
Oil-cooled


Distribution type
Chain


Units
Kit