I purchased a Malossi belt from Scooterparts co a couple of months ago. I happened to measure it's width when it arrive and it's only 23.6mm wide. Below minimum spec. That's despite stating it should be 25.1mm.
I emailed Malossi twice to ask if the variance from spec is normal or anything to worry about, and they haven't replied. I won't be buying any of their parts again.