S&S CYCLE has put together a pistons and cams tuning package for riders looking to get the most from H-D’s ’07-onward CVO 110ci Big Twin motors.
In order to increase the stock 86hp power output the engineers at S&S suggest initially changing the stock air cleaner and exhaust for parts from the Wisconsin tuning specialist’s range. The next step is the fitting of S&S’s 585 cams. These are a bolt-in fit and offered in either chain or gear drive configurations. Once these changes have been made the company states that power should increase to at least 107hp.
The next stage in tuning the 110ci Big Twin is to change the stock pistons to the high compression S&S ones. S&S says that this can be done without splitting the cases nor even having to remove the engine from the frame. Once installed the pistons raise the compression from 9.3:1 to 10.6:1 and bring the output up to 114hp.
To complete the tuning process S&S Cycle offers free EFI calibration downloads for Dynojet Power Vision tuner and S&S EZ Loader.
Also seen here, S&S Cycle's range of Big Twin big bore kits includes 98ci and 107ci options. The 98ci kit has been designed to be used on ’99-’06 Big Twins and features a bore of 3.937in, the largest that can be used in stock engine cases. No machining is needed to fit the kit, and the stock engine height is maintained. The 11-fin cylinder has been designed to resemble the stock part, but has an increased fin area for better cooling, and is offered in a choice of silver or wrinkle black finishes.
Internally the kit features centrifugal cast, gray iron liners with a 40,000 psi tensile strength for superior wear and performance and CP forged pistons with a 10cc dome.
Gaskets, piston rings, wristpins and wristpin clips are all included in the kits along with the cylinders and pistons.
The larger capacity 107ci big bore kit by S&S has been created for use on ’07-’15 Big Twin motors. It is compatible with twin-cooled engines when 900-0605 head gaskets are used. With the exception of a 4-3/8in stroke and 3cc domed pistons, the 107ci kit shares the same specification as the 98ci kit.
S&S CYCLE INC