SOHC.co.uk Forums > CB750

The Project Begins

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JamesH:
Pretty sure that's a k2 chris, because it has the earlier type front forks and the unicorn upper triple tree. What's the vin/eng number and we can confirm. K2 is a nice basis for a cafe racer so enjoy.

One thing to note about the gl1000 front end is that it is VERY heavy compared to a modern front end. Also make sure you look carefully at the trail that a modern triple tree yields - most have a different offset compared to the sohc stock setup so you may need a custom triple tree.

Enjoy...

ChrisOnABike:
Well, It looks like I have a K2 after all.  No telling how many years this thing had been sitting before I got it so I'm not surprised the seller was wrong.  He bought it to restore also and just had too much going on.  Such is the way it goes.

So, the engine number is: CB750E-2050711
The vin number is: CB750-2042888

This should be fun  :)

Trigger:
Chris, don't forget to keep all the parts you do not require. We are always on the look out and i have a K2 arriving around mid September that will need a few bits.
Do you know for the look you want to finish with?

ChrisOnABike:
If you can wrap your head around it, the look I want is somewhere in between these two images:

http://fc01.deviantart.net/fs70/f/2012/186/9/3/honda_cb_750_fab_four_cafe_racer_by_obiboi-d561hhz.jpg

and

http://bihamoto.sk/content/images/articles/73.jpg

The tank will be the biggest part and there's no way I can totally put it in words.  One of the main things I wanted to do was relocate the oil tank into the front right corner of the gas tank and use a double filler cap set up on the top of the tank like you would see on some GP race bikes, one cap for gas and the other for oil.  I can picture it in my mind very well, and I used to do metal work so I know I could make it happen given access to the proper tools - an English Wheel and a metal stretcher.  The length of the tank would be closer to the first link on the drawn up race bike.  No idea what colour I want it though.  It must have a tail of some sort.  I don't like the stubbies much. 

The shocks on the back need to be relocated to give more angle and thus a softer ride.  I watched Husqvarna do this on their desert bikes in the late 80's.  I want to keep the dual rears though - no mono shock, and I'm not looking for a soft ride, just softer than it has now.  I already have a few different plans in my head on how to do this.

One thing about putting on the GL front end, I picked up another disk rotor and I want to see if I can add it to the opposite side of the stock hub to see where they fall in relation to the calipers.  I would absolutely love it if Honda used the same rotors on the GL as the CB and adding that second rotor would give me the dual set up I want (but I'm sure it won't happen).  For the rear I would like to add a disk and the easiest way I can see that happening right now is to pick up the conversion kit from cyclexchange.com.  I want to keep spokes on it if possible.  Maybe a rear off a CBX1000 with a disk, then I could just work it for the caliper brace to fit.  The spacing shouldn't be too far off.

ChrisOnABike:
And the muffler…….   I have a very elaborate plan layed out in my mind for that too.  I want 4into1 header immediately at the front corner of the frame.  From there it will go into a muffler of my own building that will be completely contained under the frame and exit at the back corner - right or left I have not decided yet, but probably the right so it stays away from the kickstand.  Something like a Buell system that I had seen.  This means I will not be able to keep the center stand which is a shame as I really like it, but I don't want the exhaust anywhere on the side or back of the bike.  One of these days I'll actually draw this out and post it.

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