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S&S BIG BORE KITS FOR MILWAUKEE EIGHT

S&S BIG BORE KITS FOR MILWAUKEE EIGHT

S&S 131CI & 136CI BIG BORE STROKER CYLINDERS FOR MILWAUKEE EIGHT

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S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

These Big Bore cylinder and piston kits in combination with the stock 4 5/8" crankshaft in 2023 to present 121CI VVT engines or separate available 4 5/8" stroker crankshafts for other 2017 to present models enlarge the displacement of your M-8 engine to a massive 131CI (2,151cc) for the 4.250" kits or 136CI (2,229cc for the 4.320" bore kits. A huge displacement increase means huge power increase. Cylinder kits and crankshaft work with the stock crankcases and retain the stock engine height. The powder coat finish matches perfectly with the OEM engine finish. Cylinder kit includes two cylinders, two pistons, two pins, four clips, two ring sets and head-, base-, and exhaust port gaskets. Also included is an exclusive S&S 131CI or 136CI cam cover badge. The 4 5/8" stroke crankshaft must be ordered separately. Pistons work with both OEM style tapered wrist pin ends or High Performance full width piston wrist pin ends. As the stock cylinder head bolts are a single-use design you will also need eight stock style head bolts or a set of re-usable S&S High Performance head bolts. Fits all 2017 to present Touring, all 2017 to present Trike and all 2018 to present Softail.


Specifications

4 1/4" bore cylinder & piston kits

Article number Description Retail price Add to list
795054
Black with highlighted fins € 1.549,97
795055
All black € 1.549,97
795056
Granite with highlighted fins € 1.549,97

4.320" bore cylinder & piston kits

Article number Description Retail price Add to list
795119
Black with highlighted fins € 1.589,72
795120
All black € 1.589,72
795121
Granite with highlighted fins € 1.589,72

4 5/8" stroke crankshafts

Article number Description Retail price Add to list
788974
Complete flywheel assembly with tapered piston wrist pin ends and balancer gear installed € 1.624,88
788977
Complete flywheel assembly with full width piston wrist pin ends and balancer gear installed € 1.864,95
Cylinder head bolts
Article number Description Retail price Add to list
782792
Cylinder head bolt, each, 8 required (OEM 10200303) € 6,69
789136
S&S re-useable head bolt kit, includes eight pcs. head 12-point black oxide coated bolts (OEM 10200303) € 151,98

Recommended Retail Prices excluding sales tax.

Prices exclude shipping, import duties and installation.