ok im looking for some parts for my red devil. what is the stock weight of the rollers on the red devil? and what weight should i change to? also variators... what would be the best variator to get?? im going to get these done at my first service while its in the shop. also has anyone changed there spark plugs? what would be the best kind. all the UK forums recomend changing them as soon as you get the scooter. can anyone help with these topics. also i will be getting a new exhaust but that will be in another month or so.