Burner mags are not too bad - despite the volley of abuse you will see after this post
they are strong and rigid and with a clean and a regrease of the bearing should roll well on a rider
they are better than Bernadi's and simplex that some came on burner
skyways and ogk's are much better than burner mags in there design and build, bearings and as such
for a rider they will be fine - just check bearings and if there are any cracks
hope this helps