Hehe welcome to the world of bikes and Yamaha and fun and XT660com!!!!! Read this site and all of the experiences and advice, no mods are strictly necessary and it all depends what you wanna do with the bike. If your bike is new make NO mods until you have a few thousand km on the clock. Then have fun....Ciao Simon

__________________
(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....