The rear half as it stands is similar in construction to a lengthened Hayabusa swingarm with the brace on the top instead of the bottom. I know that a good turbo 'Busa makes 630 horsepower and they handle that without any obvious problem. I plan on adding some diagonial tubes to stiffen it up. I think that this chassis will successfully handle the 160 horsepower a ZX10 makes. Back in the mid 70-s I drag raced the twin to this as a funny bike. Z1 Kawasaki -1000cc turbo, alcohol fuel. Pre dyno days but I would estimate it made about 170 HP at 14 lbs boost. Ran 9.0-s at 160 mph. The Chapman drag frame I use with the 1350cc H-D engine handles 130 horsepower and has gone 150 mph without any issue at Maxton, Loring and Bonneville. I think that a ZX10 engine could push an open bike to 170 or there abouts. No concerns once I verify geometry on my chassis jig.
