Any tips? I am gonna do it myself. Have just watched Robot's videos on doing these on an HPE.
my scoot is 2years and 3months and has 25,000km and has regular service by my vespa shop.
also, how long is it ok for coolant to sit on the shelf? I know 2 years in the bike, but does it become questionable on the shelf after a few years? just thinking about how much to buy (1Lx2 or 5L bottle)