Aaron Clarke had a torrid time in Scotland when he crashed twice at Knockhill, breaking his upper arm in morning warm-up.
The Kirton rider was taken to the medical centre for assessment before being sent off to hospital where it was confirmed he had broken his arm.
He was due to have an operation to plate and pin his arm in Kilcaldy while his right hand is also bandaged as his glove came off during the accident.
Clarke also suffered a small crash in the first qualifying session in free practice when he lost the front going into turn two.
He thought the bike was okay and just had minor cosmetic damage but when he went out in the second session he discovered there was a mechanical fault which hampered his progress.
He battled on and made it onto the grid by the skin of his teeth, securing the final place on the grid for the start of the race.
But after just three laps of the short practice session he highsided going into turn seven, knocking himself out and injuring his arm.
The injury will prevent Clarke from taking part in the next round at Brands Hatch on July 20 and three weeks later the following round at Thruxton is in doubt depending on how the injury heals.