On this Kawasaki S2 trike? It looks pretty-dangerous to me. I had an H1 (500 triple two-stroke for you whippersnappers) that was adventurous-enough. This engine is the 'little brother' to the H1, but I'm sure that anyone who has the nerve to run this to redline, will have a ride like a worn-out 'Wild Mouse' rollercoaster. Please note the spool front hub! "Death wish!"