ok guys im new to the whole dirt bike field. my brother has a 93 xr-100 and he is looking to mod to the max. like big bore, biggest cam he can get, valve job, head work the whole nine yards.so my question is what are the best products you can buy for this thing? any help would be great. oh and i attached a pic of it.oh and it has new tires, a new seat cover and the plastics have been repainted too now.