FERNLEY (Oct. 26) — Things looked pretty grim for the local motocross scene when SMRA pulled the plug on its fall series late this summer. However the Reno chapter of the Over the Hill Gang had other ideas.   After a planned five-race series had to be scrubbed the club gathered its forces and staged a one-off race this weekend at the Sandbox, or Fernley Lions Motocross Track as its officially known. “We decided it was time to have a race,” said Layne Kolbet, president of the OTHG chapter. Saturday’s practice session was held during what seemed like a hurricane