Famous for its EU approved electronically adjustable exhaust systems , Dr . Jekill & Mr . Hyde ( J & H ) has a new Clubstyle 2:1 that is the result of " months of design , prototyping and testing ," according to J & H ' s Sjoerd Ottenheim , the Product Manager for the project . " Finally we are ready to present the ' Twenty- One ' - a unique and electronically adjustable 2:1 exhaust for Milwaukee-Eight Softail models ." Staged at the Venray Circuit in the Netherlands ( formerly known as Circuit de Peel ), the launch took place with the unveiling of a new project bike and group of Clubstyle motorcycles that showcased the sound of the exhaust - " a full , deep sound ," says Sjoerd . “ The Twenty-One produces a sound that really takes the power of the M-8 engine to new heights - it really is a surprise , and the better feedback from the exhaust really enhances the riding experience . It challenges the rider to demand that little extra from the M-8 , and the ' Twenty-One ' delivers . " The exhaust has been subjected to extensive sound tests to create this exceptional sound experience . It has been designed with input from a specific group of performance and Clubstyle riders . " First as a design in the computer , then as a 3D model , after which we could proceed to make a prototype . There was more to making this exhaust than just the sound of course . While sound management is what we here at J & H are best known for , the materials , the finish , the emissions and the power , in terms of hp and torque , all influenced the development and the final result . “ The headers and muffler are made of stainless steel to achieve the balance between performance and legal requirements . There are different color end cap options available , all specially developed for the M- 8 , but we also expect to be able to evolve this first M-8-specific ' Twenty-One ' for additional models in the future - additional Harleys and other brands too ." The ' Secret Sauce ' that J & H brings to exhaust sound management is its unique electronically controlled
40 AMERICAN MOTORCYCLE DEALER - NOVEMBER 2020
Text : Robin Bradley Photography : Onno " Berserk " Wieringa
( madnessphotography . nl )
and handlebar-operated valve system . " Our exhaust systems embody three different personalities : the Dr . Jekill mode , Dynamic mode and Mr . Hyde mode . With a simple push of a button , the valve that is placed halfway up the muffler closes or opens , which provides more sound and performance . According to the riding circumstances you can choose whether you are in the Dr . Jekill mode ( mild ), Dynamic mode ( responsive ) or Mr . Hyde mode ( not so mild !). The rider decides . " Either way , the Dr . Jekill & Mr . Hyde exhaust is a completely street legal system and complies with European legislation and laws - in short , while your riding style might be able to get you into trouble , with J & H the exhaust can ' t !" The production edition ' Twenty-One ' will be available in heat resistant brushed or matte black finish and offered for M-8 Softails .
THE JEKILL AND HYDE COMPANY Belfeld ( Venlo ), NETHERLANDS Tel : + 31 ( 0 ) 77 308 1070 info @ jekillandhyde . com www . jekillandhyde . com
Tech Spec for ' Clubstyle ' H-D Softail Low Rider S by Mario Kyprianides , Chopper Kulture
Engine : 114 " H-D M-8
Air intake : Ness ( CCE ) Cam chest kit and vented dip stick : Feuling Gaskets : Cometic Clutch cover , forks , sprocket : Cera Carbon Clutch cable : Barnett ( CCE ) Tuning : Don Performance
Exhaust : Dr . Jekill & Mr . Hyde ' Project 21 ' two-into-one
Frame and wheels : Harley-Davidson Skidplate : Speedmerchant Adjustable suspension : Hyperpro Brakes : Rebuffini and Brembo Brake lines : Goodridge ( CCE ) Saddle : Saddlemen Indicators : Kellermann , Atto Black Hand controls , grips and mirrors : Rebuffini Fairing : Memphis Shades
Handlebars , levers and Flo footrests : Factory Frankfurt
Handlebar bushings : CCE
Carbon side covers : Italian Performance Parts
Powder coating : MBT Paint : Chikos Pinstriping , Chicano paint job
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