In 81 Len Perry , the N Z H.R.D. / Vincent Importer , Related how on a trip to England , He had visited Amal , for the day. Whislt their top carburator man hand built the carbs ( 1 1/2 G.P.s ? ) The Lucas . Where their top magneto bloke spent the day building the magneto, under Len's eagle eye , for the Burns & Wright Record Attempt . Visiting H R D He discussed with Phil Irvine the requirement for the Cylinder Heads . And took two days overseeing their machineing and assembly , by you guessed it , Vincents top Head Man . And brought these components back to N.Z. , in a suitcase . Comment from Burns ( or Wright ) when asked, that He Himself was the Engine Tuner snorted Len , were that " He might have set the points . perhaps . Len having spent till 2 A.M. for two weeks , after work , fitting and assembling the engine . ( This while we were catalouging his remaing stock of new Vincent H.R.D. components .) Hios opion was , having roadraced them himself , and built the 51 Hydroplane 1.4 midgit 8 x 4 ft record holding motor, ( 1951 ? ) Still in his posestion then , was that 90 H.P. on the existing crankshaft mainshaft , was good for 160 mph, unstreamlined . a.k.a Pukekohe . Also that the shift due to inertia was slow , the selectors prone to bend , if hurried or forced . From the Horses Mouth .