Manx Grand Prix organisers are reminding road users the Mountain Course will close at 5pm on Saturday, an hour earlier than usual, for the first practice session of the 2010 meeting.
The earlier start time is designed to give the 50 newcomers who have signed up for racing extra time on the circuit.
The roads open car will leave the Grandstand shortly after 8pm, and the course is expected to reopen about an hour later.
Clerk of the Course Phil Taubman is delighted with the number of newcomers:
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