S&S Cycle 557 Easy Start Cam Kit For Harley Twin Cam 2006-2017

S&S Cycle 557 EZ Easy Start Camshaft Kit For Harley Twin Cam

If you’ve put together a hot bike – or if reliability is paramount – an S&S Easy Start Cam Kit should be on your list. Don’t bother fooling with compression releases or massive-output batteries and super-high-buck starters. S&S designed the Easy Start cams with performance in mind, but then revamped the design to give you great power on a cam that starts easier than a dirtbike. At the center of the cam lives a centrifugally retracted, spring loaded compression release lobe milled into the heel of each exhaust lobe. At cranking speeds, the lobe bumps the exhaust valve open slightly during the compression stroke, making the engine much easier to turn over. Once the engine fires and reaches 800 RPM, the lobe swings out of the tappet roller path, allowing the engine to run normally and with full compression. Ain’t technology great?

Features:

• Start any engine regardless of displacement or compression ratio with a stock starter
• Save your starter and battery; tested for 10,000 starts without running battery down
• Allows for easy start by initially reducing cranking compression, but once the engine starts and rpm increases, the compression release lobe is centrifugally retracted and the engine runs normally, with full compression, and without any loss in performance
• Available in chain drive and gear drive versions
• All chain drive cams include installation kit
• All gear drive cams include 4-gear set and installation kit
• Made in the USA

557 Cam Info:

• Optimized for Tri-Glides 2009-2011 and heavy bikes needing lots of bottom and mid-range performance
• 557 has short duration to produce lots of torque
• Can be used with some engines with stock pushrods, springs and lifters; high-lift valve springs may be required for some applications
• Intake open/close 6°/27°
• Exhaust open/close 39°/12°
• Intake duration 212°
• Exhaust duration 231°
• Lift .557″