The swing arm arrived today. I'll be taking this into the machine shop with me tomorrow to make a few modifications. My best estimate is:

• Shave a few millimeters off each side so that the 900rr swinger will fit into the CB900 frame
• Lathe a new pivot bolt
• Order some new bearings (it looks like i finally get to use my new hydraulic press)
  

Then I should be ready to build the mounting bracket for the shock. ( I really ought to get some wheels soon too...)

With the 900rr swingarm on order, I figured I would tackle the removal of the stock swingarm. My plan is to pull take measurements from the outer edge of the swingarm with the little caps on the end and machine the 900rr swinger to the same dimensions. It should be centered, but I will know after I take some calipers to it.

Also, I'm not sure of the final geometry for the rear suspension. I am going to start designing the mount for the monoshock but make it so that I can weld the actual bracket for the shock on in one piece as the last step. This way I can mock up the whole suspension and really commit when I am positive that it is mounted exactly right.

Just waiting on my parts....

I want to use 5 spoke RC51 wheels but they cost 2x what 6 spoke 900rr wheels cost. We'll see what I come up with.

I have been searching for DOHC CB750F's for a few months. It seems like everyone and their dog wants one to work on. Considering that I wanted to do a big bore kit anyways it seemed perfect to find this 1981 CB900F. 902cc is slightly larger than the big bore anyway.

$700 cash and I got to bring this bad boy home. The guy was very nice and happy to sell this to a guy who loves motorcycles. He proceeded to throw in some new turn signals and a windscreen. I didn't want to upset him by telling him that he can keep all that stuff since I'm going to tear this down to bare steel and build it back up.

Now, where to start! I think I'll head to the junkyard with some calipers and a tape measure to figure out a front suspension that will work.

I spent a few hours last night trying to figure out what I want to do with the suspension on the 900.

In the beginning I was going to take the easy route out and bolt on an F2 swinger. That just doesn't look very good to me. Then I found this guy out of the Netherlands who figured out that a 900rr swing arm will bolt on with a few modifications! So, prompted by that and the insanely high prices at the local junkyard, I turned to ebay.

Within a few minutes I found an apparently spotless CBR 900rr swing arm for $90 including shipping. This same guy was selling the shock from the same 900rr for $60. So I promptly registered and bought my first two items off of ebay. Let's hope it goes well. (My friend Mack has had nothing but problems with people selling stuff on that site)