Mine was a copy of Marcel Vincent MVP5000 port work from a alky cylinder he did. That saw in video cuts was race ported with external transfers. Also had a decent square chain on it for gtg's.
My woods ported 5000 with stock oem carb ran real close to it. Done by a friend username Twinturboram and used same Marcel Vincent info but with no extra transfers.
The guy that did the copy of MVP cylinder for the racesaw I cant recommend as he turned out to be POS THIEF. Caught him stealing from me twice in same month in 2010 and cut all ties with the

.