Honda CB750 DynoJet - 70hp @ 140mph
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- เผยแพร่เมื่อ 4 เม.ย. 2017
- My complete rebuild of a 1981 Honda CB750C tuned to insane levels by Jordan Engineering. It features OEM ignition control modules, K&N air filters, Mac 4 into 1 exhaust, race plugs and Yuhasa battery. Final Dyno reading had it pumping out 70hp and a max speed 140mph.
Everything about this video is badass.
Captain Kurt Jordan. Amazing Tunining.
He can build and is a respected road race mechanic. He can build Yamaha TZ250s fast and all those Formula State Championship too!
Al M.
The guy is a legend!
My ears just came
1:15 - Just reeks badass
I thought these DOHC 750s were 78hp stock. that pipe sounds great though
From my understanding, manufacturers artificially inflate the numbers by tuning certain aspects of the engine to inflate output for marketing purposes then reel it back for production. I've heard putting production '79-'82 CB750s (pre-tuned) up on the dyno is actually closer to 55hp stock. They also measure hp from the crank rather than rear wheel output which is a huge difference.
Thanks, pipes are MAC 4-to-1 canister.
Those are probably RWHP
Awesome sounding bike. Do you remember the jet sizing on the carbs?
Lol put the air box back on it and don’t worry about it. Only thing you can do to get past jets is maybe electrical tape around the pods and restrict all of the airflow
I can't remember but I know the diameters are only slightly wider than the stock parts.
Never give up jetting cv carbs. It ain't going to be easy. Only weak pansy asses give up early
Wow, amazing sound. Since you have air pods, what size Jets are you running? Did you "fill up" your pods with washers or similar?
Thanks! I can't recall the exact diameter, but if you find the OEM size, I remember it's only the next size larger that's offered. The air filters are straight out of the box K&N RC-0984
I can't remember exactly but know the diameter is only slightly wider than stock, nothing crazy.
Hello. Does this bike have the stock drive/wheel sprockets, which I believe is 18/48? Is the rear wheel a 16 inch, or is it an 18 inch? Thank you.
Yes, they are stock and powder coated
damn, I've been working on my 78 cb 400 hawk and it doesn't sound anything like that, but realistically it as half the amount of cylinders. You wouldn't happen to know of any good exhausts for my little hawk?
Anything MAC makes is great, can't say for sure if they make them for your model or not.
Sweet!
What size jets are you running?
I can't recall the exact diameter, but if you find the OEM size, I remember it's only the next size larger that's offered.
talk to Jes Built...he has 170hp motors for these babies.
😳😳😳
Beautiful sound! Are you running the stock CV carbs with jetting or using CR carbs?
I have the same bike (stock) and those look like my CV carbs
Thanks! The carbs are stock but the jets are aftermarket...only slightly wider diameters
Does it still have the original cams?
Yes, original cams.
Hi! May I do the same mods on my 1981 cb750f? thanks
Absolutely, but I don't have the complete list anymore :-(
We need jet sizes and air fuel mixture settings please sir
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The 80 Supersport had 75hp stock.
From my understanding, manufacturers artificially inflate the numbers by tuning certain aspects of the engine to inflate output for marketing purposes then reel it back for production. I've heard putting production '79-'82 CB750s (pre-tuned) up on the dyno is actually closer to 55hp stock. They also measure hp from the crank rather than rear wheel output which is a huge difference.
They advertised their hp ratings based on power made to the crank Wich is always more than what is made at the rear wheel.