Hi jay,
I think you’re ‘right on the money' at “45/50 rwhp back in the day (about the same as a good mid 60’s Thruxton T120 Bonneville, e.g., as per Malcolm Uphill’s first 100 mph Production TT lap on the model).
I’d agree with 60 rwhp (24/7) for a modern Manx, so that’s an increase of 30 to 33% thanks to ‘production uplift’ of an engine design that doesn’t really impart much in the way of scope… so my view is that the percentage increase in latter-day Manx output really is ‘rather spectacular’.
So what now for the RC45?
Regards to Jay and all,
Roger.