So the powder coat shop I am working with told me they would prefer the steering head bearing NOT be in the frame when they coat it. The issue I have with that is I need to install the bearings so I can assemble the front end and fab up my new steering stops. I think I will tell them they just need to mask them off well. Once installed, I am not going to ruin them by pulling them back out, and I need to finish all of the welding before the frame gets blasted and powder coated.
Instead of a cross brace behind the carbs/under the seat, I decided on a single cross tube. It's placed close to the mid point in the frame between the engine mount points and the frame junction at the rear of the fuel tank.
I want to use a "superbike" style handlebar, but the CBR600-RR front end uses a clip on style handlebar set up. I decided on Woodcraft riser clip ons, with a 3" rise. They arrived today, and I think these will give a better control position that the stock Honda clip ons (I didn't get the bars with the front end).
I did not like the idea of having the bars mounted by bolt through the thinnest part of the top triple tree. It is cast aluminum, and I do not have a TIG welder (and have never learned how) so I would need to pay someone to weld it for me. Add the time and expense of fabricating or modifying handlebar clamps. Since this build is a bit of a resto-mod with the modern front end, it was an easier solution to use off the shelf parts.
I have been working on the new design for the steering stop. I had a couple of ideas, but went with the simplest design. There is a round post that extends down that the stock lower triple tree would contact with two cast tabs. I ended up welding a .25" thick x 1.00" steel flat bar on the end of that post - the edges with contact the outer edge of the Honda lower triple clamp. Sorry, no pictures yet. I will post some when I remember to bring my phone to the shop!
Looks like you have added a good bit of metal to that frame. What is your intended usage? It should make a pretty stable road racer.
Not sure if this link will work but this shows where the old skool racers guys used to brace the GS1000 frame (which is one of the better handling UJM's.) Brace point C is one of the more critical so you may want to go after that if you still have a hanker'n to add more.
I would like it to be a capable track day bike, with a vintage superbike theme. I will ride it, keep it for a while, then probably sell it to help fund the next project (what that may be God only knows!). Originally I wasn't thinking about bracing it, but when it was brought up it made too much sense not to.