Topic: Another SOHC heavyweight superbike!

[gschuld]

Thanks Bill,

We have retired the bike now, after some real amazing racing with My rider Rob Wittey, taking 1300 and 750 championships  we achieved some really amazing results against some very competive machinery, rob north framed triumph triples our main adversary, I had some help from Mark at M3 racing with special cam profile and headwork, and ken at cycle x with some of the parts. But we got through quite a few engines getting there.   a truly great experience I will always remember for the rest of my years

http://www.good-bits.co.uk/2015/04/good-bits-honda-4-wins/

FWIW....

I’m always interested to hear more about the bike and your experiences with it😉

George

[RAFster122s]

Jerry, whatever it was...check out how little is left between cylinders in the top case. Small bore, eh?

[Bill/BentON Racing]

77F, engine full of RC stuff....

[Eddie747]

Finally started to collect parts for the project. As of now I plan on building the bike in two phases due to more important commitments over the winter. Phase one will just be to put together a good chassis and suspension setup and run the stock engine for the upcoming season. Phase two will be to build an engine. One of my buddies is going to run a guzzi in heavyweight and our bikes will be pretty comparable . I recently picked up a clean cbr600 f3 front forks and triples and already swapped the stems. I also purchased a front wheel and brakes. I need to machine a top triple but otherwise the front end is mostly complete. The biggest task is going to be dropping weight. I know a LOT will come out with just getting rid of the comstars but shedding weight elsewhere will require some creativity.

[slikwilli420]

The biggest weight factor is the need to keep the stock bodywork. Based on what I figured could be done, you should be able to get to 400lbs and 105-110hp which would make for a pretty competitive package for a good rider.

[Eddie747]

I have some ideas on how to take weight out, I just won’t know how effective they are until I have done them but every little bit helps. I would be thrilled if i can get down to 400 with oil but no fuel. Another question I have is how much are guys bracing the stock frames? It seems like some people go over the top and others say it’s not that necessary.

[slikwilli420]

I braced the piss out of mine. You can also change neck angle in superbike so worth looking into .

[Ramrod_Racing]

I have some ideas on how to take weight out, I just won’t know how effective they are until I have done them but every little bit helps. I would be thrilled if i can get down to 400 with oil but no fuel. Another question I have is how much are guys bracing the stock frames? It seems like some people go over the top and others say it’s not that necessary.

My '82 CB650SC weighed in at 416lb with oil and no fuel. That's still with the Comstars and no real efforts of weight reduction aside from taking off what isn't necessary. Hoping that a wheel swap and an aluminum swingarm setup will get me near 400 as well. Going total loss ignition and making it bump-start only would help a lot too, but I'm not willing to get that extreme with it yet.

I'm not running any frame mods at the moment and only Turn 4 at Barber made me wish I had a steering damper. Running the stock forks with .85 springs and a Fastec brace. Swing arm's been braced and is controlled by Fox Podium shocks that have been re-valved and re-sprung from their off the shelf setting.

All this being said, my motor is stock and pretty weak. I'd be surprised if it's putting out half the horsepower that you're going to be shooting for, so take all of the above with the appropriate grains of salt.

[Eddie747]

Finally got some motivation to start working on this and trying to get it ready to go for rockerbox. It will still be on a stock motor but all the suspension stuff will be mostly complete. This is how the bike sits as of now. CBR600 F3 forks and and wheels, Pirelli supercorsa TD tires, vortex rearsets, CBR600 F3 calipers front and rear. Im waiting on brake rotors, sprockets, chain and braided brake lines and its ridable. A bit of gusseting left that i want to do but that is minor. Really excited to ride the bike and see if everything works. Will it be competitive as is now? No. But it will be good enough to chase around my buddy on a guzzi and learn what I need to improve on.

[slikwilli420]

Looking really good! I like the wheels as well, but the rear looks awfully wide, but then again the limit is 5.5" and I am not used to seeing wheels that wide on our bikes. With a good tune on a stock engine, good brakes and suspension, you might be surprised what you can do, especially on twistier tracks. I hope you make it to RA as that is my favorite track on my schedule for the year.