This is very common on the Garelli based rubber clutch system. Old clutches loose their elasticity and eventually just stay expanded. go to this site http://www.mopedriders.org/article_view.php?faq=2&fldAuto=42 it is the Garelli repair manual. Look in the tranny section. Remeber that this is the VIP 2 speed motor aka Grand Sport Twin, pages 70-74. The Garelli repair manual has both the NOI and VIP trannie in there so don't get confused. Print the tranny diagram on page 70 & 71. If you need any more info. PM me.