Designed to be installed in a stock engine case by boring the cases to accommodate 4 bore cylinders

Features an integral pinion shaft and sprocket shaft for maximum stability and resistance to flywheel distortion

Ships pre-balanced and is assembled with a press-fit OEM proven crank pin

Combined with the JIMS bullet proof H-beam 4140 forged machined connecting rods

Uses forged blanks instead of conventional billet material for improved strength

Manufactured from aerospace-quality cast aluminum and steel

Now with VHR (Vertical Horizontal Ribbing) technology, cylinder casting to cylinder sleeve adhesion is effectively and uniformly locked throughout the entire cylinder casting

VHR technology, combined with proprietary cylinder body geometry, equalizes the cylinder top to bottom (for optimum cylinder concentricity) when placed under torque load

Stroker cylinders are enhanced with eleven equally spaced fins improving the total fin pack surface area by 25%

Cylinders seamlessly blends into existing OEM components

Include a compete set of JIMS premium forged pistons, a pair of piston oiling jets and complete instructions to install this stroker kit

Compression ratio based on 85.9cc head with .040 head gasket and 9.5cc piston dish at zero deck height

Must use EFI spacer kit sold separately

Stroke 4-1/2 , Bore 4 STD, Flywheel diameter 8-1/4 , Compression Ratio 9.94:1 (stock heads)

Compression Ratio: 9.94:1

JIMS USA Part #: 1957

HARLEY-DAVIDSON MODEL FITMENT
May Fit Other Years And Models. Call For Details: