After a good few years of debate, a decent alternative drive belt has been found by forum member Steph99 (well done on finding the missing piece of thje jigsaw).
The replacement is a belt for a Malaguti madison 125 1999-2005
Available from www.chinesemotorcyclepartsonline.co.uk
Drive Belt 22-30-828 V-Belt Malaguti Madison 125 99-05, price £15.37 free delivery
One thing to note though; While it works in a static test, as yet it has never been road tested (be warned). It has been noticed that the belt rides a little high in the front pully but this should be corrected by simple shims between the reaction plate and the outer pully.
hi ref variator belt from chinesepartsonline 22 30 828
i ordered one of these belts,and it did not fit my t10 is this the right belt
thanks vince
Perhaps someone would like to try the NEW Triumph Tina drive belts we had specially manufactured to the original specification. 7/8″ x 1/2″ x 34″. These are a Variable Speed Cog-Tooth belt of seriously heavy industrial construction. The section is just 1/16″ deeper, but we’ve tested them and they run fine.
Having taken the spec from a genuine original belt, I’d say these are much tougher. £18 each + postage from Mopedland.