This is the Ultrastrong Cosa clutch. It features CR80 clutch plates with the aluminum base plate and has wide contact end to provide lightweight plates with maximum grip with little wear to the basket, and also has 10 springs with a L rating. The basket is CNC machined and lined for long life and less chance on engines, even tuned engines of 35 HP. This clutch fits with the standard clutch cover and fits bikes that were original fitted with a Cosa or 7 spring clutch. It can be used on other engines but requires grinding on the case and clutch cover. The 23 tooth gear is for use with the stock 65 tooth Piaggio cush gear.
