640 Easy Start Camshaft Kit — 95"/96"/103"/110" engines, 10.5:1–11.5:1 compression, 3,000–6,000 rpm

S&S CYCLE 640 Easy Start Camshaft Kit — 95"/96"/103"/110" engines, 10.5:1–11.5:1 compression, 3,000–6,000 rpm – 99-06 Touring, 00-06 CVO, 00-06 Softail, 99-05 Dyna

S&S CYCLE
0925-0619
106-5250
Reduces compression for easier starting; retracts at rpm for full compression. For 95"–110" engines, 10.5:1–11.5:1. Installer checks required.
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The 640 Easy Start camshaft kit reduces crank compression during starting so the engine spins over more easily; once running and rpm increases, the compression release lobe retracts centrifugally and the engine operates with full compression and no loss of performance. 🔧

Key points:

  • Designed for use with 95", 96", 103" and 110" engines with compression ratios between 10.5:1 and 11.5:1.
  • Optimized performance in the 3,000–6,000 rpm range.
  • Made in the USA.

Installer notes and warnings:

  • Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance before final assembly.
  • Not for models equipped with OEM compression releases.
  • High-lift springs and adjustable pushrods are required for proper operation.

Follow proper installation procedures and torque specifications for a safe, reliable fit. ⚠️

: 0925-0619
In Stock

Data sheet

Type
Gear
Units
Kit
Brand
S&S CYCLE
Application
Exhaust, Intake
Grind
625 Series
Exhaust Close
20°
Exhaust Duration
260°
Exhaust Lift
0,625"
Exhaust Lift at TDC
0,184"
Exhaust Lobe Centerline
110°
Exhaust Open
60°
Intake Close
55°
Intake Duration
255°
Intake Lift
0,625"
Intake Lift at TDC
0,189"
Intake Lobe Centerline
107,5°
Intake Open
20°
Harley Family
CVO
Dyna
Softail
Touring

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Road King Touring 1999
Harley Davidson Road King Touring 2000
Harley Davidson Road King Touring 2001
Harley Davidson Road King Touring 2002
Harley Davidson Road King Touring 2003
Harley Davidson Road King Touring 2004
Harley Davidson Road King Touring 2005
Harley Davidson Road King Touring 2006
Harley Davidson Road King Classic Touring 2004
Harley Davidson Road King Classic Touring 1999
Harley Davidson Road King Classic Touring 2000
Harley Davidson Road King Classic Touring 2001
Harley Davidson Road King Classic Touring 2002
Harley Davidson Road King Classic Touring 2003
Harley Davidson Road King Classic Touring 2004
Harley Davidson Road King Classic Touring 2005
Harley Davidson Road King Classic Touring 2006
Harley Davidson Road King Touring 1999
Harley Davidson Road King Touring 2000
Harley Davidson Road King Touring 2003
Harley Davidson Road King Touring 2004
Harley Davidson Road King Touring 2005
Harley Davidson Road King Touring 2006
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Road King Screamin Eagle CVO 2002
Harley Davidson Road King Screamin Eagle CVO 2003
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Electra Glide Touring 1999
Harley Davidson Electra Glide Touring 2000
Harley Davidson Electra Glide Touring 2001
Harley Davidson Electra Glide Touring 2002
Harley Davidson Electra Glide Touring 2003
Harley Davidson Electra Glide Touring 2004
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Touring 2006
Harley Davidson Electra Glide Classic Touring 2002
Harley Davidson Electra Glide Classic Touring 2003
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Classic Touring 1999
Harley Davidson Electra Glide Classic Touring 2000
Harley Davidson Electra Glide Classic Touring 2003
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Classic Touring 2006
Harley Davidson Electra Glide Screamin Eagle CVO 2005
Harley Davidson Electra Glide Ultra Classic Touring 1999
Harley Davidson Electra Glide Ultra Classic Touring 2000
Harley Davidson Electra Glide Ultra Classic Touring 2001
Harley Davidson Electra Glide Ultra Classic Touring 2002
Harley Davidson Electra Glide Ultra Classic Touring 2003
Harley Davidson Electra Glide Ultra Classic Touring 2004
Harley Davidson Electra Glide Ultra Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 2006
Harley Davidson Electra Glide Ultra Classic Screamin Eagle CVO 2006
Harley Davidson Electra Glide Touring 2004
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Touring 2006
Harley Davidson Street Glide Touring 2006
Harley Davidson Street Glide Touring 2006
Harley Davidson Heritage Softail Softail 2006
Harley Davidson Heritage Softail Classic Softail 2000
Harley Davidson Heritage Softail Classic Softail 2001
Harley Davidson Heritage Softail Classic Softail 2002
Harley Davidson Heritage Softail Classic Softail 2003
Harley Davidson Heritage Softail Classic Softail 2004
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Heritage Softail Classic Softail 2006
Harley Davidson Heritage Softail Classic Softail 2001
Harley Davidson Heritage Softail Classic Softail 2002
Harley Davidson Heritage Softail Classic Softail 2003
Harley Davidson Heritage Softail Classic Softail 2004
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Heritage Softail Classic Softail 2006
Harley Davidson Fat Boy Softail 2000
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2002
Harley Davidson Fat Boy Softail 2003
Harley Davidson Fat Boy Softail 2004
Harley Davidson Fat Boy Softail 2005
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2002
Harley Davidson Fat Boy Softail 2003
Harley Davidson Fat Boy Softail 2004
Harley Davidson Fat Boy Softail 2005
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy 15th Anniversary Softail 2005
Harley Davidson Fat Boy Screamin Eagle CVO 2005
Harley Davidson Fat Boy Screamin Eagle CVO 2006
Harley Davidson Heritage Softail Softail 2006
Harley Davidson Softail Deluxe Softail 2005
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Softail Deluxe Softail 2005
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Heritage Softail Springer Softail 2000
Harley Davidson Heritage Softail Springer Softail 2001
Harley Davidson Heritage Softail Springer Softail 2002
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Softail Springer Classic Softail 2006
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Softail Springer Classic Softail 2006
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Road Glide Touring 1999
Harley Davidson Road Glide Touring 2000
Harley Davidson Road Glide Touring 2001
Harley Davidson Road Glide Touring 2002
Harley Davidson Road Glide Touring 1999
Harley Davidson Road Glide Touring 2000
Harley Davidson Road Glide Touring 2001
Harley Davidson Road Glide Touring 2002
Harley Davidson Road Glide Touring 2003
Harley Davidson Road Glide Touring 2004
Harley Davidson Road Glide Touring 2005
Harley Davidson Road Glide Touring 2006
Harley Davidson Road Glide Screamin Eagle CVO 2000
Harley Davidson Road Glide Screamin Eagle CVO 2001
Harley Davidson Dyna Super Glide Dyna 1999
Harley Davidson Dyna Super Glide Dyna 2000
Harley Davidson Dyna Super Glide Dyna 2001
Harley Davidson Dyna Super Glide Dyna 2002
Harley Davidson Dyna Super Glide Dyna 2003
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Super Glide Dyna 2005
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Super Glide Dyna 2005
Harley Davidson Dyna Low Rider Dyna 1999
Harley Davidson Dyna Low Rider Dyna 2000
Harley Davidson Dyna Low Rider Dyna 2001
Harley Davidson Dyna Low Rider Dyna 2002
Harley Davidson Dyna Low Rider Dyna 2003
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 1999
Harley Davidson Dyna Wide Glide Dyna 2000
Harley Davidson Dyna Wide Glide Dyna 2001
Harley Davidson Dyna Wide Glide Dyna 2002
Harley Davidson Dyna Wide Glide Dyna 2003
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Limited Edition CVO 2001
Harley Davidson Dyna Wide Glide Limited Edition CVO 2002
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Super Glide Sport Dyna 1999
Harley Davidson Dyna Super Glide Sport Dyna 2000
Harley Davidson Dyna Super Glide Sport Dyna 2001
Harley Davidson Dyna Super Glide Sport Dyna 2002
Harley Davidson Dyna Super Glide Sport Dyna 2003
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2005
Harley Davidson Dyna Super Glide T-Sport Dyna 2001
Harley Davidson Dyna Super Glide T-Sport Dyna 2002
Harley Davidson Dyna Super Glide T-Sport Dyna 2003
Harley Davidson Softail Softail 2000
Harley Davidson Softail Softail 2001
Harley Davidson Softail Softail 2002
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2004
Harley Davidson Softail Softail 2005
Harley Davidson Softail Softail 2006
Harley Davidson Softail Night Train Softail 2000
Harley Davidson Softail Night Train Softail 2001
Harley Davidson Softail Night Train Softail 2002
Harley Davidson Softail Night Train Softail 2003
Harley Davidson Softail Night Train Softail 2004
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Night Train Softail 2006
Harley Davidson Softail Night Train Softail 2003
Harley Davidson Softail Night Train Softail 2004
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Night Train Softail 2006
Harley Davidson Softail Deuce Softail 2000
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2003
Harley Davidson Softail Deuce Softail 2004
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Deuce Softail 2006
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2003
Harley Davidson Softail Deuce Softail 2004
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Deuce Softail 2006
Harley Davidson Softail Deuce Screamin Eagle CVO 2003
Harley Davidson Softail Deuce Screamin Eagle CVO 2004
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2004
Harley Davidson Softail Softail 2005
Harley Davidson Softail Softail 2006
Harley Davidson Softail Springer Softail 2000
Harley Davidson Softail Springer Softail 2001
Harley Davidson Softail Springer Softail 2002
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005