i have a honda trx 300 2x4 and rebuilt the top end it rund but the timing chain is loose cause i can hear it slapping on the in side i will go to adjust it and the adjuster wont go out any further to but tension on the chain and rails and does any one no how many ft/lbs you need to adjust hte valves in it

 

Time for a new chain my friend. About 125 with chain, gaskets and such. Pull the valve cover, side cover, both clutches. Easy if you pull the foot peg. If the timing jumps then it'll bend the valves and the price goes up, also then you have to pull the head.

Valve lock nuts aren't much at all, 4,5,6 ftlbs. It;s only a 6mm nut.

 

i would get a new chain too. i would consider a new tensioner also.