We use ALTO friction and steel plates for 2 decades in all aircooled Buells and Sportsters up to beyond 160HP without any fail.
We used ALTO Red in Dragbikes with up to 145HP and we can say its, even that it might cost just the half of some competitors products, all you need for your road bike.
If you go Road Racing or pull a lot of clutch wheelies, the ALTO Carbonite plate are our recommendation, but for normal usage the ALTO RED are all you need.
ALWAYS PRE-SOAK ALL FRICTION PLATES OVER NIGHT IN THE GEAR BOX / PRIMAY OIL YOU WILL FINALLY USE, BEFORE YOU ASSEMBLE THE CLUTCH!
ALTO about the Red Eagle Material:
This is our oldest and most reliable grade. It is the most popular as well. It offers the best combination of performance and price. For most applications it is ideal as it offers high heat resistance and durability at an affordable cost.
Under our Art. Nr. 991063 you find the steel ALTO plates, Art. Nr. 991064 is the Alto Carbonite kit.
To change the clutch plates you need to compress the clutch package with a compressor tool. You can either buy or borrow the tool under Art.Nr. TR1003.
OEM Number for reference
37910-90