Huntington Beach, California based clutch specialist AIM Corp has introduced upgrades for the Harley-Davidson A&S (Assist and Slip) 3-stud style clutch.
Their new VP-SDR is said to be the first sliding lock-up system in the industry and features a new sliding weight design. The centrifugal force of the sliding weights will create 105 lbs extra clamping pressure at 4000 rpm, creating up to 40% more clamping force and 120-130 lbs extra clamping pressure at high rpms.
It makes an easier clutch pull option available - up to 30% lighter during low rpms - that handles over 105 ft-lbs of torque with AIM's softer orange springs installed, and for a street performance option it handles 120 ft-lbs torque with the OEM 2013 and up CVO springs.
However, with AIM's new replacement performance clutch coil spring kit for 2013 and later Harley 3-stud style A&S clutches, it handles up to 155 ft-lbs torque; the performance coil springs are rated at being able to handle 360 lbs of pressure and said to be 35 percent stronger than the stock springs.
The slider weights are designed to fit behind stock 103” and 110" derby covers and easily installed, in just 10 minutes or so, through the derby cover without needing to remove the primary cover - no modifications are needed.
The kit contains the VP-SDR Lock Up Head and mounting hardware; performance clutch coil spring kit available separately. It fits '13 and later CVO 110 inch models, '13 and later Tri-Glides and Free Wheelers, '15 and later Ultra Limited Low and Electra Glide Classic Low models, and '15 and later 110 inch Softails.
AIM CORP
www.aim-tamachi.com