These 3 7/16 in. +.080" bore, standard compression stroker pistons are part of an S&S stock bore stroker kit for 1936-1984 HD® big twins, and are designed to be used in conjunction with S&S® stroker flywheels. Flywheels of the following strokes may be used for the following displacements:
4 1/2" Stroke - 84"@ 8.4:1 Compression
4 5/8" Stroke - 86" @ 9.1:1 Compression
4 38/4" Stroke - 88" @ 10.8:1 Compression
These pistons are normally used in stock HD® cylinders, and must be purchased separately, based on the required piston oversize. The modern alloys used in these pistons, coupled with the advanced skirt profiles, allow them to be fit tighter resulting in low engine noise and long engine life. In the past this could only be achieved with weaker cast pistons.
Cylinders are available from S&S® offers machine shop services through the S&S® Service and Speed Center. New pistons can be fit to your existing cylinders for a reasonable charge
to be used with part number 14-9064
(4) Cir clips
(2) Wrist pins
(2) Top rings
(2) Second rings
(2) Spacer rings
(4) Oil rings
The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. Due to these legal restrictions this part cannot be shipped to California.
|Bore Size||3 7/16 in.|
Part 133909 fits the following machines