well you might have overheated the scooter due to
many things ...
too much air causing a lean condition
bad air filter , too big of a filter , adding a pipe without adjusting/ replacing the jets
too little oil
wrong plug, too hot or a combo of some of these things,
let me know if you want parts
oilyhans
i own a scooter shop with rentals ,sales& racing parts.
i also appraise scooters for KBB.
2003 Vino classic stage 0.75
de-reged stock variator w/8g sliding weights.
1.5k rpm springs
42mph
2005 veniceLX ~70cc~upjet~1.5k rpm springs & 7gr sliders
46mph
KeyWest de restricted~8gr slide