rite me again! i dont have the tools to tighten up my chain(my fault i know) and ive recently noticed that the chain is almost touching the center stand. its not yet tho. what i wanna no is will it last me another 250 miles? has after that i will be taking it in for a new chain and sprockets to i just wannat no will it last with out causeing any damage to my bike all chain falling off. any advise??