El Bruto Engines Big Inches
Economy backed by Racing Technology

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A Barrel-Chested Brute of an Engine to POWER your Bike
The 127 Cubic Inch Engine . . .
Our True Animal.

Our True Animal.

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El Bruto™   Series 127 ci  4.25" bore Engines

Heavy Duty 3-Piece Press Pin Type Crank

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. Midwest’s commitment engineering excellence and competitive pricing brought El Bruto to life with a completely new design set of castings emphasizing performance, reliability, and value.

All of the castings in these Engines are poured in US foundries and are based on all new CAD designs cast from C355 Aluminium a common US Military alloy known for its stability over multiple heat cycles. The engine components are machined on state of the art CNC equiptment for guaranteed dimensional accuracy and repeatability. All of our engines are dynamically balanced using propritory methods to provide the smoothest running engines on the market and now with our new high flow cylinder heads these engines now can boast the most powerful engines on the market as well!!

We think that you will agree these engines are the best value anywhere.

Product Specifications/ Highlights 127 Ci

Bore: 4.25"

Stroke: 4.5"

Piston: Mahle Forged

Compression: 10.2:1

Rated Power: 140RW Horsepower

145 LB FT Torque

Camshaft: 264 Duration .625" Lift

Pushrods: Ultima

Valve Spring: Ultima

Chrome Nose Cone/Rocker Boxes

Billet Oil Pump

Chrome Tappet blocks

Mikuni 45mm HSR Series Carburetor


See description here >> CASES <<


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.


C355-T6 Casting

Cast in heavy wall liners will not move

Liners are Centrifugly Cast with Graphite impregnated Nickle
for high durability

All Fins are machined for an excellent cosmetic appreance

Cylinder Head

C355-T6 Casting

All fins are machined for excellent cosmetic appearance

Twin Cam Styling means 30 % More fin than most
Evo style heads for cooler running

Compression release valves

2.100 Stainless Int Valves

1.700 Stainless Ex Valves

Manganeze Bronze guides

High Silicon WireValve Spring w/ Chromoly Retainer

 127 CI Complete Engine

298-272 Complete 127 CI Engine-- Natural Finish

298-273 Complete 127 CI Engine---Black Finish

298-274 Complete 127 CI Engine---Polished Finish

127 CI Long Block Assembled

298-281 Long Block 127 CI Natural

298-281 Long Block 127 CI Natural Finish

298-281 Long Block 127 CI Natural Finish

298-282 LongBlock 127 CI Black Finish

298-283 Long Block 127 CI Polish Finish

127 CI Long Block Unassembled

298-284 Long Block 127 CI Natural Finish

298-285 Long Block 127 CI black Finish

298-286 Long Block 127 CI Polish Finish

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Good Old


Tour the Engine Engineering Dept.
and Assembly Facility
>> TOUR <<

Styled Machining & Clean Custom Looks
That are backed up by
Smooth Powerful Performance


>>  100" ENGINE  <<

>>  Long Blocks  <<

>>  113" ENGINE  <<

>>  120" ENGINE  <<

>>  Long Blocks  <<

>>  127" ENGINE  <<

U L T I M A    E N G I N E S

>>  80" ENGINE  <<

>>  Short Blocks  <<

>>  96" ENGINE  <<

U L T I M A    C O M P O N E N T S

>>  Engine Cases <<

>>  Stroker Kit  <<

>>  Connecting Rods  <<

>>  Cylinders & Heads  <<

>>  Ignition Line  <<

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