American Landmaster 450E Drive Belt question

[Timpiker]

My UTV is a few years old and gets very little use.  I just noticed the drive belt slapping the plastic guard and making some noise.  The manual tells me how to replace it but not how to tighten it.  Apparently, there is no adjustment.  Does anyone know if there is an adjustment?  Is the belt supposed to have a lot of slop in it?

[Timpiker]

FYI, I sent an email to Landmaster about this issue.  They told me these belts are supposed to be loose, and possibly slap the plastic cover during idle.  Then, as you give it the gas, the 2 pulleys will separate, tightening the belt.