Collection: Drivetrain & Transmission
El Bruto 127ci Complete Driveline Open Belt Primary 6 spd RSD Transmission
Ultima is now offering the new " El Bruto" series engines which are designed to provide our customers with a USA built high performance engine that was priced to be the best value of any engines now on the market. All of the castings in these Engines are poured in US foundries and are based on all new CAD designs cast from C355 aluminum, a common US military alloy known for its stability over multiple heat cycles. The engine components are machined on state of the art CNC equipment for guaranteed dimensional accuracy and repeatability.
Ultima’s carburetors are directly interchangeable with S&S Super G carburetors. They will accept S&S jets and S&S bolt pattern air filter assemblies. Includes a relocated accelerator pump nozzle for increased throttle response and thunder jets are bolt on. Simply remove the plugs and screw in the Thunder Jet. No expensive machining required.
Our new state of the art designed crankshaft incorporates a massive 1.670 diameter pin that is pressed into the one piece, heat treated, 4140 steel flywheel half making these crankshafts some of the strongest available on the market today. These crankshafts feature all new 7.7" long H-Beam rods with .927 diameter wrist pins to handle all the power you can throw at them. These are also balanced using our exclusive methods making these some of the smoothest engines in the industry.
The 6-speed transmission is complete, and ready-to-install.
Designed to fit OEM Harley-Davidson Softail Style Motorcycles made from 1990-1999 with exception to the starter drive assembly which uses the 1989-1993 diameter jackshaft bolt (1/4-20). These drives will also fit most aftermarket Softail and Rigid Frames designed to use Softail style components made within these years.
This complete kit includes belt, mounting hardware, detailed installation instructions with illustrations
El Bruto 127ci Complete Driveline Open Belt Primary 6 spd RSD Transmission features:
- Bore: 4.25"
- Stroke: 4.5"
- Piston: Mahle forged
- Compression: 10.2:1
- Rated power: 140RW horsepower
- 145 LB FT torque
- Chrome nose cone/rocker boxes
- Billet oil pump/tappet blocks
- Ultima R1 carburetor
- All fins are machined for excellent cosmetic appearance
- Twin cam styling
- 30% more fin than most Evo style heads for cooler running
- Complete with MSO and warranty