SOHC.co.uk Forums > CB750
836cc kit choices - do I need a new cam?
Yoshi823:
I didn't have the bike Dyno tested as they were not very numerous back in the day. I'm not sure which one modification made the biggest difference either, as I did many of them in one go. What I do know from my backside dyno is that the engine accelerated quicker with much more torque in the bottom & mid-range & on several occasions beat my brother on his standard GS1000S in straight line acceleration & top speed runs. The bike also handled better than his bike, much to his annoyance ;D
Rozabikes Tim:
RE BHP I used a big bore kit on my my DOHC 750, taking out to 823cc + cams + flowed head and carb mods. Gave 95 BHP at rear wheel after proper dyno set up at TTS. Big percentage gain over 78 BHP ish (at crank) for stock I think?
Keeping in mind you are talking SOHC / 8v, therefore poorer breathing and less output to start with, something less than the 95? Not very scientific I know....
It did transform my bike both in terms torque and top end but yes to get all the bits working together it is a big expense to consider....
theshootist:
--- Quote from: rozabikes on November 22, 2016, 05:30:49 PM ---RE BHP I used a big bore kit on my my DOHC 750, taking out to 823cc + cams + flowed head and carb mods. Gave 95 BHP at rear wheel after proper dyno set up at TTS. Big percentage gain over 78 BHP ish (at crank) for stock I think?
Keeping in mind you are talking SOHC / 8v, therefore poorer breathing and less output to start with, something less than the 95? Not very scientific I know....
It did transform my bike both in terms torque and top end but yes to get all the bits working together it is a big expense to consider....
--- End quote ---
Thanks. My engine was not performing very well to start with, if an 836cc bore with standard head and cams can get me anything above the stated standard output then it will feel a huge improvement.
Greebo:
I have to say after the complete rebuild [to stock] I am very happy with the stock performance of my 750K6...IMPO if you want faster get another bike..
My Thruxton is faster than the Honda & My Ducati is faster than the other 2... But I get a Real Buzz riding them all .... 8)
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