S&S, 4" stroke flywheel assembly for models 99-06

Standard 4" race.
Note: Engines with strokes greater than 4" may require S&S piston lubrication jets and clearance notches between piston and jet in the piston skirt to avoid contact.
Note: S&S crankshafts allow the use of replaceable bearing shells at the bottom of the connecting rods. The first generation of S&S crankshafts, in use until 2012, had a diameter of 1.500". The second generation of crankshafts, in use since 2013, has the larger OEM diameter crankshafts of 1.671". Now S&S and OEM crankshafts are identical in diameter, so S&S parts can be used to rebuild stock H-D flywheels, something that was previously not possible as H-D rebuild parts were not and are not available.
Note: The following applies to 03-17 models. S&S designed these flywheels to work with a Timken-style pinion shaft bearing; they fit 99-02 factory models and all S&S crankcases without modifications. Factory H-D Twin Cam engines from 03-17 use the same pinion shaft roller bearing as is used on the pinion shaft, a cheaper but weaker solution. It is possible to use the weaker factory 03-17 pinion shaft bearing kit (OEM H-D 24004-03B) with S&S flywheels in factory 03-17 crankcases. However, S&S believes this roller bearing will not withstand the side loads produced in a high-performance engine. S&S will not honour any warranty claim in an application where the roller bearing-style pinion shaft bearing assembly OEM 24004-03B/24605-07 03-17 is used. To upgrade to the pre-2003 pinion shaft bearing style, the MCS 978517 JIMS conversion tool kit is available. This kit includes one tool, one Timken bearing and one steel crankcase bearing insert for one engine. Bearing inserts are available separately as 978519, and bearings separately as 508960.
Note: In all applications, the technician must be able to assess the components to determine their suitability in combination with the other engine components, prior to installation. It is important that a qualified mechanic installs them and makes the necessary adjustments.


Specifications


Brand
S&S


Application
99-06 Twin Cam (Excl. 2006 Dyna) (NU)


OEM
24004-03B, 24605-07


Sales unit
Set


Material
Steel


Packaging weight
17.446 kg


HS Code
84831021


Motorcycle family
DYNA, SOFTAIL, TOURING


Original name
S&S, 99-06 4" stroke flywheel assembly