G'Day Jerry, thanks for that mate, to be honest, I haven't checked my number again as to whether it's 7 or 8 digits, I'll do that today, and report back to you.
The horsepower thing is no real mystery mate, Honda quoted 67 BHP for all CB750's except the F2/F3, which was 71, but that's BHP measured at the crank.
They used an engine dyno with just an engine strapped into it back then, to get impressive figures like that, but nowadays we use rear wheel dyno's, that tell us how much BHP and torque we're pumping out at the rear wheel.
51 BHP at the rear wheel is actually quite good mate, I've seen dyno cards for CB750's with under 50. Normally 20-30% loss of BHP through the drive train is about right, so when you've got guys here who are getting 80+ BHP at the rear wheel on their hot rod 836's, 900's etc, you can get an indication of just how much a set of bigger pistons, bigger valves and better ports, and a high lift cam can change the standard engine from "Ho Hum", to "Holy Shiit!".
I did a few "bolt on" mods to my Triumph Rocket III to elicit another 20 BHP at the rear wheel, (141 now, and 147 foot pounds of torque) it's so easy with modern bikes, just swap out the exhaust system, add a new ignition map and install a higher flow filter and it's done, but of course being such a big engine helps, there's a CB750 hiding in each of the Rocket's 3 cylinders!
You want a cooler kit mate? I think we can do that, I haven't ordered those parts yet as I'm waiting on the bill for the blasting and powder coating, so maybe I could send you a smallish shopping list for CB750 Supply and you could order it for me in exchange for a complete cooler kit? I suppose you'll be wanting braided stainless lines with fancy AN fittings too? Let me know mate, and I'll get it done!
