I need old-timers' mecanic wisdom. (I can rebuilt a chainsaw but don't know much about motorbikes) 1. how much pressure per inch ppi should i put in my tires? or does it depend on the tire and what i do with it? 2. There is(was) a ruber piece between my chain and a piece of metal. the rubber is worned down and my chain is sliding on metal. my chain ain't too loose; I got it tighten yesterday. In Viang Vieng nobody seems to have the damn piece I need. how long for my chain to get ****ed? or is a chain last forever? thanks guys! if there's a way; i'll find it!