Good. Although I never thought it could be. I have a good friend that race a DR in Southern California.
Ported head, cam, hi compression piston , Black Ops Moto coi, 37 Keihen pumper,Fox Airs, 43mm RM forks . No problem ripping holeshots and finishing in front or winning. In 1982 I would never think a DR500 would be holeshottimg Maico 490s and yz490s.
I had a 78 DR370 back in the day. Most fun bike I have ever ridden