250 Pro XS 250 vs Racing 250 XS

[stan merck]

What is the difference between these engs other than a higher rev limit
on the 250 XS. I know the 250 XS is hand built but is it ported for more
top end? Does this eng need to turn over 6000 rpm to really perform?

[merccoop]

Besides a higher rev limiter, I am pretty sure the 250xs has solid motor mounts where the pro xs has rubber. Also, I think you have better gearcase options with the 250xs over the pro.