SOHC.co.uk Forums > Project Board
CR750 replica build
CR21:
So progress from today:
Seat/tank brace:
It took a while to position this piece around the frame tubes neatly :-\ And then I remembered after speaking to a previous CR750 builder that I needed to add a breather hole through the brace to accept the crankcase oil breather line. So out the brace came, breather hole installed and back in, jigged up and welded:
I still need to add the tank strap hook as well as the seat hooks to the brace.
I bought a spare top yoke in order to see if I could convert a standard CB750K item to look more like the CR750 part. I was unsure of two things, the strength with the cast handlebar bosses removed and how the holes could be filled neatly. Anyway to cut a long story short, I cut the boss off with the bandsaw, linished and shaped the yoke surface, drilled out the threads to remove contaminants, filled the holes with rod. Then this was welded up and linished back!
I am relatively happy with the result, it still needs a fair bit of fettling here and there to smooth out the surface but I think it will be alright when finished. Luckily the die cast material welded really well ;D
Rearsets:
Braced up ready to weld:
As the rearset is effectively 'sealed' a hole was drilled to stop outgassing spoiling the last part of the weld:
The front fairing spigot was also welded up and tacked to the frame to kick off the fairing fitting:
Also as a little side job, the oil tank is hung from the top with an original honda lined bush. These fix onto threaded bosses on the frame, I was going to turn these from solid bar however they looked a bit heavy, so I turned the back off of each one to thin them down.
Fitting of the fairing, oil tank and other frame items will happen in a future fabrication session. Just got to fettle the yoke and fit the fueltank tank strap hook in place tomorrow and then I will start to build up the front end with the double disks!
Cheers,
CR21
MCTID:
I have to say Scott - as an ex Welding/ Radiographic Inspector and CNC Machine Shop Inspector - that I am mightily impressed with your Project.
It's been a pleasure to see how you are progressing and I can't wait to see the final product.
Keep up the good work - and please keep those photos coming............CR Porn no less....LOL.
mike the bike:
I'm enjoying this thread as well, can wait for the next exciting episode. You're probably the only one of us doing anything at the moment.
CR21:
Thanks guys! As I have said before, of course I would not be at this point without the help of some great friends and acquaintances whose knowledge and skills bank is simply inspiring! Of course I have picked up a lot from the forum as well :D
Cheers
CR21
MarkCR750:
I'm saying nothing, 😄 Actually I will, it's excellent, unfortunately it makes mine look like what it is a cheap lookalike! 😄
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version