Just to confirm, and to add my experience today - I rode to Mae Sot, and what a ride! I set off at 2am, completely empty roads, mostly newly laid roads too, all the way to the mountain pass at Tak, which despite having some road works going on, was absolutely amazing to ride! Both inbound and outbound rides were amazing, really nice flowing corners ????
The ride back on the 'highways' though, that was horrible. Maps sent me through Singburi, Ang Thong & Ayutthaya, and the roads absolutely shook me to bits, so best to come back the way I went in future, through Suphanburi & Chai Nat - lesson learned.
The border experience was nice enough, apart from the bad manners of the Burmese crossing the border, it's as if nobody else existed...
I paid B500 for my Burmese border hop, and both the Burmese and the Thai IO's were friendly and happy, which is a million miles away from my experiences with Cambodian & Laotian IO's.
So, all-in-all, I recommend this visa run, especially if you're riding, as traffic jams simply don't exist - I managed 980kms in 12hrs 37mins, with a few stops each way.