how come on my 99 400 xplorer after one ride after i adjust the chain it needs it again??any ideas

 

I had a simillar problem on a trailblazer, I put a new chain on. Best I can figure is that there is a certain amount of STRETCH with a new chain. If chain is not new it must have pulled you adjustment back. Was everything good and tight? Keep in mind,I have also heard the polaris chains like a bit of slack or they will break.