S&S, 4-3/8" stroke flywheel assembly, 99-06

Compatible with 93/103/106 and 110/117 engines. Balanced to a total piston weight of 1035 grams.
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 lower end 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 wheel axle, a cheaper but weaker solution. It is possible to use the weaker factory 03-17 wheel axle 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 wheel axle 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


Material
Steel


Packaging weight
17.746 kg


HS Code
84831021


Motorcycle family
DYNA, SOFTAIL, TOURING


Original name
S&S, 99-06 4-3/8" stroke flywheel assembly