I held off doing mine for months cos i was too scared i'd break it,wish i hadnt waited,its pretty esy and it makes a big improvement in performance.
I did a full derestrict,
Race variator with 5.5g rollers,
variator boss,
#82 main jet,
cdi cut.
Runs great now, over 80kmh/50mph down hill,75-80kmh on the flat.
jump in