xmotos

I Want to mod gio x31 250cc .Does anyone know The mod i can do on my bike.or part Like valve camshaft etc

hello,is that someone knows this bike.it like a very good bike.this is the link to the description:XZ450R dirt bike - Detailed info for XZ450R dirt bike,450cc dirt bike,XZ450R dirt bike,XZ450R on Alibaba.com and another link with a second picture:450CC Motocross Model Xz450r-4 Valve - China...