how do i get this sproket on?????

[enduro400rider]

i had a 16T on my 400ex and when it was in the shop i had the 15 put back on i want the 16 on agian but i dont know how to get more slack in the chain how do i go about doing this i thought it would be simple? and my chain doesnt come apart at the master link its a regina Oring chain do i need a special chain breaker to get it off

[rubiowner01]

Just loosen the four bolts on the back of the swingarm, then put your allen wrench in one of those slots on the left and push it forward. That should loosen the chain...

[enduro400rider]

ok i got it on now but my battery decided not to let me ride today i gotta get a new on it keeps goin dead:( maby ill jump start it tommarow and see how my top speed is :devil: