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Wednesday 2 February 2022

Midwest Motorcycle Supply

Ultima 124" Twin Cam Engines

Noted for nearly three decades as one of the leading aftermarket V-twin replacement engine and component options, this new 124" Twin Cam from Ultima "features the same high quality, affordable price components that have made our Evo style engines such a popular stock replacement or custom build option."
The Ultima cases for its Twin Cam style engines use Timken sprocket shaft bearings and late model style cam bearings and pinion bearing. Manufactured to close machining tolerances from prime A360-T6 aluminum for excellent tappet bore wear resistance, they have counterbored stainless Allen head case bolts. "A tried, tested and trusted design, these are the same crankshaft assemblies that Ultima has been building for years.  

"Our 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; crank pins are installed with .008" press fit.  
"These crankshafts feature lightweight 7.67" long H-Beam rods with 0.927 diameter wrist pins to handle all the power you can throw at them - they are balanced using our exclusive, proprietary methods, making these some of the smoothest engines in the industry.
"The C356-T6 casting heads feature conical valve springs (2.100 stainless intake and 1.700 stainless exhaust), chromoly retainers, manganese bronze guides, compression releases and stainless steel valves with high Silicon wire valve springs. All the fins are machined for excellent cosmetic appearance."
The bore is 4.125” by 4.625” stroke with 10:1 compression; intake and exhaust cam lifts are .570” and the high-quality pistons are forged dome designs by Mahle Motorsports. The flywheel Is a 3-piece construction; the rocker boxes are Ultima designed with 1.6575” ratio.
Valve train components include an Andrews 67H set of cams and Ultima's 4140 steel adjustable pushrods, topped off with 4140 forged steel roller rockers. The cam chest components include a billet oil pump and billet cam support plate with late model style hydraulic chain tensioners for reliability and durability.
These 124"/2,032 cc competition series engines come with a six-month warranty; finish options include black, blackout, polished or silver.