Maxima 40-05901 V-Twin Synthetic Primary Chaincase Fluid

Maxima V-Twin Synthetic Primary Fluid is a high-performance lubricant specifically formulated for Harley-Davidson transmissions and primary chaincases. Engineered for use in all 1984 and newer H-D models equipped with wet diaphragm spring clutches, this synthetic fluid delivers superior protection and performance in demanding riding conditions.

Key Features:

• High film strength formula provides exceptional protection against shock loads, wear, and extends fluid service life
• Advanced extreme pressure additives and surface active chemistry enable smooth, precise shifting under peak loads and high RPMs
• Superior resistance to mechanical shearing and thermal breakdown maintains optimal viscosity retention in severe operating conditions
• Enhanced friction modifiers reduce clutch drag and improve cold flow performance for easier cold starts
• Premium detergent package ensures ultra-clean operation, protects gears from wear and deposits, and promotes trouble-free performance
• Fully formulated synthetic gear oil—no additional additives or boosters required
• Compatible with petroleum and synthetic oils for easy fluid transitions
• Simple drop-in replacement with no special procedures required

This premium synthetic primary fluid meets and exceeds all known OEM specifications and will not void new motorcycle warranties. Designed for riders who demand maximum protection and performance from their V-twin powerplants.