Re: Are the DOHC's significantly faster than the SOHC's?

Posted by Piute on Apr 27, 2012; 9:20pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Are-the-DOHC-s-significantly-faster-than-the-SOHC-s-tp3940119p3945495.html

seestheday wrote

Here's my 1981 CB 750K: http://www.bikez.com/motorcycles/honda_cb_750_k_1981.php

Lists 77 HP stock.

Here's the 1978 CB 750K: http://www.bikez.com/motorcycles/honda_cb_750_k_1978.php

Lists 67 HP stock.

That's a 15% increase in horsepower.  That is fairly significant.

You also have to account for the the 81 being 564 pounds wet and the 78 551, but that is only a 2% increase in weight.

Of course, modding will get you a lot more and it's all about how much money you want to spend.  If you really want to go fast get a ZX14 with 192 HP

              81 d.o.h.c. only 4 hp.diff.then a s.o.h.c. 1977 F2(73hp.),See what A good / diff.head job could do ?

Model: Honda CB 750 F 2
Year: 1977
Category: Sport touring
Rating: 66.5 out of 100. Show full rating and compare with other bikes
Engine and transmission
Displacement: 736.00 ccm (44.91 cubic inches)
Engine type: In-line four, four-stroke
Power: 73.00 HP (53.3 kW)) @ 9000 RPM
Top speed: 197.0 km/h (122.4 mph)
Compression: 9.0:1
Bore x stroke: 61.0 x 63.0 mm (2.4 x 2.5 inches)
Valves per cylinder: 2
Fuel control: OHC
Cooling system: Air
Gearbox: 5-speed