Surprisingly one of the rarer bikes in the collection . KR1 and KR1- S's are reasonably plentiful . Only 150 KR1 - R's were made for the Japanese domestic racing scene . Differing from the other Hiroshima screamers the 'R'  model makes  over 70 hp with different tuning , 35mm carbs , stiffer clutch springs and a close ratio gearbox . Most were destroyed by Kamikaze pilots . This example never found it to a racetrack. Pictured here at the Japanese auction where it was found for me by Raider Motorsport.