Ultima® Black Gem™ 80 ci Specifications

• Bore 3-1/2"
• Stroke 4-1/4"
• Piston: Cast
• Compression Ratio: 8.5:1
• Rated power: Rear Wheel Horsepower 75
• Torque 85 lbft.
• Camshaft: Crane 316 - Lift .490"
• Duration:242 Intake
• 252 Exhaust
• Pushrods & Valve Springs: Crane
• Nose Cone/Oil Pump: OEM H-D® Parts
• Carb: S&S "E" 1993 & later
• Chrome rocker box, tappet block, nose cone
• Polished oil pump on cast case . . .
• Black powdercoat on black cases

CASE FEATURES:
Made in U.S.A. Cast-in steel inserts guaranteed not to move. Large bore breather for increased crank case vacuum and less blow by. 1/2" Alignment dowels for true line bore. Counterbored stainless steel allen head case bolts. Close machining tolerances. Made from prime C335-T6 aluminum that is superior in strength to A356. Styling and cosmetic machining for a sharp custom look.

CRANKSHAFT:
Forged 4140 Steel. Dynamic balanced for the smoothest running engines in the industry. Light weight high-performance H-Beam rods. Jims machining shafts and pins.

CYLINDER:

• Ultima® 3-1/2" bore heavy liner
• Cast Pistons

HEADS:

• H-D® Castings.
• Black Diamond valves: 1.840 Intake, 1.615 Exhaust.
• Crane valve springs.