S&S, big bore kit 129". Black cylinders

2102cc kit. Converts the 107" engine to 129". Largest big-bore kit with a 4.320" bore for direct installation. No stroke flywheels required. Compatible with stock crankcases, requiring no crankcase machining, stock flywheels, stock cylinder heads and maintains the original engine height. The kit includes: 4.320" forged big-bore piston, 4.320" big-bore cylinders with black powder coat finish, 2 x .030" MLS (Multi-Layer Steel) head gaskets, 2 cylinder base gaskets, 4 cylinder alignment dowels and S&S cam cover for cubic inches. Black powder coat finish to match the OEM finish.
Note: For the 132" kit (to convert 114" engines), S&S measured 135.51HP and 145.83TQ with stock heads, 550 camshaft, stock throttle body and high-flow Stealth air filter kit.
Note: Fuel injection and ignition adjustment may be necessary.
Note: S&S recommends the S&S 576972 cylinder head bolt kit for all big bore applications.


Specifications


Brand
S&S


Application
17-24 M8 with 107" engine (NU)


Colour
Black


Material
Steel


Finish
Wrinkle


Packaging weight
12.597 kg


HS Code
84099100


Motorcycle family
SOFTAIL, TOURING


Original name
S&S, 129" big bore kit. Black cylinders