Jamie Hamilton has been added to the list of injury absentees at the Metzeler Ulster Grand Prix.

The Wilson Craig Honda rider had hoped to take his place on the grid at his home race, but the young Ballyclare rider withdrew from the meeting on Wednesday.

Hamilton was involved in a heavy crash at the Skerries 100 in July and suffered injuries including a broken pelvis and cracked sternum.

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The former British Superstock 600 champion made a tentative return to racing at the Armoy road races at the end of last month but Hamilton has erred on the side of caution at Dundrod as a torn muscle injury came to light.

"I was passed medically fit to race but it turns out I've a muscle at my pelvis which is torn in half," he said. "The advice I received was that it would probably get worse as the days went on if I raced this week so there was no point in racing if I wasn't going to be competitive.

"I'm gutted because this is my home race but these things happen in racing. Hopefully I'll get out next week at the Classic TT."

Manx rider Conor Cummins plus Lincolnshire's Gary Johnson were also ruled out of the Dundrod showpiece due to injury.

Cummins broke his forearm in a spill at the Southern 100 will Johnson is still recovering from injuries sustained after coming off in the Superstock race at the Isle of Man TT.