Loose End Cap
If you've noticed that your R1 trainer has developed a noise when riding please check that the plastic end cap covering the bolt that holds the flywheel on the trainer has not come loose. If it has, open up a small gap and apply some Gorilla Glue or similar high-strength adhesive to the underside and the inside edge of the cap in several spots to ensure that it won't come loose. The cap does not need to be removed from the trainer to do this.
Excessive Belt Noise
If your trainer has excessively loud belt noise, try the adjustment outlined in this article.