• 4" stroke with a 4" bore
• Cylinder length is .260" taller than stock. 100" engines generally fit in a stock Sportster frame with no modifications
• Compression rate 10:3:1
• Crankcase has 1986-1990 (4-speed) style gem geometry, 1991-2003 (5-speed) style drive side
• Includes S&S Super Stock cylinder heads, crankcase, cylinders and pistons,flywheels balanced and assembled, supreme rods, pinion and sprocket shaft, S&S 555 camshaft set, gear case components, adjustable pushrods and pushrod cover assemblies, hydraulic tappets and tappet guides, Super G carburetor kit, S&S roller style rocker arms and shafts and billet aluminum rocker covers
• Primary components, charging system, ignition system, oil pump and transmission components are not included
• Natural aluminum finish
• These engines come with a 12-month maufacturer's warranty
• Special order only
• Fits 1986-2003 SPortser models

49-6535 natural finish
49-6536 natural finish with IST ignition
49-6537 black finish
49-6538 black finish with IST ignition
49-6539 polished finish
49-6540 polished finish with IST ignition