Harley Alto Pro clutch kit fits Twin-Cam 1998-06

This High Performance Pro clutch kit designed for replacement of Harley Davidson® motorcycle 1998-06 with Twin-Cam style clutch basket.
Alto® American made clutch kit.
Larger surface clutch friction area (20% more v.s. stock clutch)
This kit solved stock clutch slip/performance loss issue, that is common issue on stock clutch system.
before you upgrade to larger bore engine, try to improve clutch performance first, you will find out the difference.

To keep spring stronger and persistently is choosing thicker material with professional heat treatment, our spring is 0.077” that is stronger diaphragm spring 15% stronger v.s. OEM standard spring or other thinner material spring usually 0.068”
Feature higher performance upto 20% more torque delivery (due to clutch slip loss).

Clutch performance means how much TORQUE can be transferred to transmission.
Torque (foot-pound, ft-lb) = Distance (foot, inch) x Force (pound)
At limited distance, increase force is the only way to increase torque.
Force (pound, lb) = pressure (PSI, pound per square inch) x contact area (square inch)
Our clutch kit has stronger spring and more contact area.

Bad clutch means (warped steel plate or wear out friction plate), that will reduce contact area, check flatness of steel plates and thickness of friction plate is the basic step.

We use Alto® American made clutch kit, quality we trust.

         Includes in this package:

• special center hub(1),
• retaining ring (1)
• high performance clutch friction plate (9),
• steel plate kit (3mm (1), 1mm (9))
• billet aluminum T6061 CNC machined pressure plate (1),
• High performance EVO style diaphragm spring (1), stronger v.s.silver spring
• CNC machined Billet aluminum spring pressure plate (1)
• lock tab (2)
• shoulder nut (4)
• small shim(4) kit for decrease pressure adjustment when needed (new clutch may need, remove shim after clutch break in.), place small shim between end of shoulder nut and stud, one shim per stud.
• large shim(4) kit for increase pressure adjustment when needed (clutch slip):, place large shim between shoulder nut and top of spring pressure plate, one shim per nut to extend clutch  life.

*** For removal/Installation, must refer Harley Davidson® service manual and certified mechanics.

Technical
Unit	SET

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