Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Beehive Springs with .650in. Lift.

Product Details Note: Maximum Recommended Lift = .650in.* Beehive steel valve spring kit* Ultra pure chrome silicon+Nickle spring wire* Extra processing for fatigue resistance* Resist pressure loss & fatigue associated with extremely aggressive cams in high compression engines* Reduce vibration & harmonics* Includes springs,retainers & upper & lower collars* 185lbs@1.860, 370lbs@1.250in.* coil bind 1.150in.* Small end ID = .740in., OD= 1.185in.< P>* Large end ID = 1.055in., OD = 1.500in.* CNC machined keepersTech Tips:-* Rocker box clearance must be checked* Spring travel must be checked * Valve timing must be accurate** Over revving will lead to pre-mature failure of Valve Springs & collars. MFR PART No: AV-VSK6500 ROLLIES PART No: AV-VSK6500