stock is the 7 ,for slightly modded scooters a 8 will work,
but as soon as you give it more air or have too small of a jet or really
out of tune you can burn it up , so a 9 is suggested for really modded scooters..
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