If you have up to 2" of slack, the chain is WAY too loose.
You may be able to make the chain last up to two more years but it will eat any sprockets you put on there. You may not be able to make it out with the naked eye but the chain is worn & it will imprint this wear pattern on any sprocket it's wrapped around.
I would recommend just spending the $$$ now & getting a full kit. Chains are only suppossed to last about 12-15 anyway.
KC-10 FE out...
