<Ul> <Li> Machines must comply with general technical rules as per ACU Standing Regulations and 2015 IOM TT regulations . <Ul> <Li> Any four - stroke twin cylinder motorcycle originally sold for road use with a water - cooled engine of up to 650 cc engine capacity . </Li> <Li> Eligible machines must be from models homologated for road use 2006 or later . </Li> </Ul> </Li> </Ul> <Li> Machines must comply with general technical rules as per ACU Standing Regulations and 2015 IOM TT regulations . <Ul> <Li> Any four - stroke twin cylinder motorcycle originally sold for road use with a water - cooled engine of up to 650 cc engine capacity . </Li> <Li> Eligible machines must be from models homologated for road use 2006 or later . </Li> </Ul> </Li> <Ul> <Li> Any four - stroke twin cylinder motorcycle originally sold for road use with a water - cooled engine of up to 650 cc engine capacity . </Li> <Li> Eligible machines must be from models homologated for road use 2006 or later . </Li> </Ul> <Li> Any four - stroke twin cylinder motorcycle originally sold for road use with a water - cooled engine of up to 650 cc engine capacity . </Li>

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