Jims Catalogue

FLYWHEEL ASSEMBLIES

TWIN CAM ® ALPHA & BETA STROKER FLYWHEEL ASSEMBLIES TWIN CAM ® ALPHA & BETA Add Your Own Pistons!

JIMS ® now offers both early or late Twin Cam ® Alpha flywheel sets and early Beta’s. These Alpha or Beta flywheel assemblies were designed to be installed in a stock engine case by boring the cases to accommodate 4” to 4-1/8” bore cylinders. Use a JIMS ® case bore tool to perform the bore modification to your case. See catalog page 168. JIMS ® 3-piece Twin Cam ® flywheel assemblies feature an integral pinion shaft and sprocket shaft for maximum stability and resistance to flywheel distortion. Each kit ships assembled with a press-fit. The OEM proven crank pin is combined with JIMS ® bullet proof H-beam 4140 forged machined connecting rods. Flywheel assemblies use forged blanks instead of conventional billet material for improved strength. NOTE: When increasing to a larger bore size and stroke, JIMS ® highly recommends on the 2003 to present Twin Cam ® models that you convert the left crankcase bearing to the more durable H-D ® No. 9028 Timken ® bearing. Use JIMS ® Timken ® conver- sion tool No.959 to perform this operation. For more details see No.959-IS instructions and catalog page 133. BALANCING INFORMATION To maintain JIMS ® balance factor for the smoothest engine perform- ance possible, you will need to install a 2 piston set having a total weight, including all rings, wrist pin and wrist pin keepers. Use pistons weighing between 1125g to 1145g when building with the following flywheel parts numbers: 1881, 1882, & 1886, for 4-1/2" stroke. Use a 2 piston set weighing between 1125g to 1135g when building with the following flywheel parts numbers, 1883, 1884, & 1888, for 4-5/8" stroke.

7.600” Length

.927” Wrist Pin Diameter

2

H Beam Construction

4340 Chromoly Material

RACE ONLY

1.671” CRANK PIN& STOCK ROD ROLLERS INCREASE RIGIDITY AND LOAD CAPACITY.

TWIN CAM ® BETA STROKER FLYWHEEL ASSEMBLIES (WITHOUT PISTONS) PART NO. APPLICATION STROKE WRIST PIN BUSHING FLYWHEEL DIA. No. 1886 Use on Beta Softail ® 2000-06 4 1/2” 0.927” I.D. 8 1/4” No. 1888 Use on Beta Softail ® 2000-06 4 5/8” 0.927” I.D. 8 1/4” TWIN CAM ® ALPHA STROKER FLYWHEEL ASSEMBLIES (WITHOUT PISTONS) PART NO. APPLICATION STROKE WRIST PIN BUSHING FLYWHEEL DIA. No. 1881 Use on Alpha 2006-present FXD 4 1/2” 0.927” I.D. 8 1/4” or Alpha 2007- present FL. No. 1882 Use on Alpha 1999-05 FXD 4 1/2” 0.927” I.D. 8 1/4” or Alpha 1999-06 FL. No. 1883 Use on Alpha 2006- present FXD 4 5/8” 0.927” I.D. 8 1/4” or Alpha 2007- present FL. No. 1884 Use on Alpha 1999-05 FXD 4 5/8” 0.927” I.D. 8 1/4” or Alpha 1999-06 FL.

21