American Motorcycle Dealer AMD 174 January 2014 | Page 8

Sportster head work now offered by S&S S&S Cycle is now offering CNC porting on cylinder heads for XL models. The CNC porting service being offered on ’04 –’14 Sportster models is described by the Wisconsin business as being similar to the program it provides for Big Twins. The customer sends a set of heads to S&S, who then give CNC ports to them for less than the price of a comparable set of new performance heads. Once machined, the heads are assembled with new premium valves, bronze guides, and high-lift valve springs. Customers also have the option of buying a set of CNC ported 1200cc heads outright. Due to the design of the XL motor, a set of CNC ported 883cc heads cannot be used on a 883cc engine. The motor must be upgraded to a 1,200cc or 1,250cc engine with high performance pistons with larger valve reliefs. CNC ported 1,200cc heads are compatible with stock 1,200cc pistons, but work on 1,250cc engines as well. S&S recommends the use of a cam with TDC lifts no greater than .213in intake, and .215in exhaust to achieve .050in valve to valve clearance. The S&S CNC porting service is not available for previously ported heads, heads that have been structurally damaged, or heads that are determined to be unserviceable during initial inspection. CNC porting is not currently available for Harley-Davidson CVO engines or Screamin’ Eagle cylinder heads. S&S CYCLE La Crosse, Wisconsin, USA Tel: [phone] [email protected] www.sscycle.com PARTS AND ACCESSORIES