More About The New S&S X-Wedge Engine

While governmental EPA and CARB compliance were high on the S&S list when conceiving their new engine, another major issue was to resolve problems associated with large-displacement V-Twins. Although the V-Twin industry is synonymous with the 45-degree V configuration, engine builders have always contended that the main limiting factor of performance is the construction of the flywheels. Current designs have the flywheel pressed or bolted together. These construction techniques can lead to flex or movement of the assemblies in relationship to one another, resulting in degraded engine performance. Also, as displacement grows, and the weight of the reciprocating mass increases, vibrations increase as well and can become outright uncomfortable.  Another ongoing issue for many years with V-Twins is excessive crankcase pressure and oil carryover. So, S&S decided to start from square one and come up with a new design that would avoid these potential issues. Thus, the X-Wedge engine program was born. Configuration of the X-Wedge is a departure from the engines S&S has historically produced. The major difference both technically as well as atheistically is now (instead of being a 45-degree angle) 56.25-degree to address concerns of space limitations. Another major departure from current engine design is the use of three camshafts. A major reason for multiple cams is to provide for nearly straight pushrod angles.  The X-Wedge is available only with fuel injection. The engine will be making its debut sometime in the fall of 2007 in select Big Dog Motorcycle models as well as models from some other OEMs. Customers will be able to purchase the X-Wedge in either a raw finish with polished fins, black finish with polished fins or completely polished. X-Wedge Engine.

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5 Responses to “More About The New S&S X-Wedge Engine”


  1. 1 Mike Mar 27th, 2007 at 11:13 am

    S&S Cycles always does it right. This new X-Wedge is going to be a success.

  2. 2 DONNIE Mar 27th, 2007 at 2:51 pm

    WE DID THE S&S SEMINAR AT THE V-TWIN EXPO AND THEY HAVE DONE THEIR HOME WORK ON THESE MOTORS …AND I BELIVE DAYTEK IS ALREADY IN THE PROCESS OF DEVELOPING CUSTOM FRAMES FOR THESE BADBOYS ….

  3. 3 Ryan Mar 28th, 2007 at 1:47 am

    any idea the Hp and the torque ratings? How much they will cost?

  4. 4 harleychick13m Mar 28th, 2007 at 1:34 pm

    I want one!!!!!

  5. 5 Walt Jul 17th, 2007 at 12:47 am

    A certain aftermarket motorcycle parts company out of Huntington Beach, CA had the idea for a performance V-Twin that utilized a one-piece automotive crank, automotive rocker arms, etc., way back in the late 1980s. It’s too bad that engine didn’t meet with success. S&S Cycle picked up the ball and kept going until the new-era V-Twin came to fruition. The X-Wedge engine is what the aftermarket needed 20 years ago! If placed in the “right” frame, the Wedge will make a great powerplant for a nice bobber or a streetfigher. Hopefully, someone builds a conventional, twin-shock, swingarm frame for the Wedge. I might consider a Wedge over the “factory’s” 103 “B” engine for a future project. The possibilities seem endless. Welcome to the 21st century (at last)!

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