SOHC.co.uk Forums > Project Board
CR750 replica build
Chris400F:
--- Quote from: MCTID on November 17, 2016, 12:33:47 PM ---Scott (CR21) is a Designer in real life.
--- End quote ---
So he has a head start then! But if you have the knowledge, enthusiasm and facilities then you may as well make the most of them.
Even so the amount of research he has done and the attention to detail is very impressive.
CR21:
Hi guys,
Thanks for the replies. There are some extremely high-quality builds on this forum, and a lot of fantastic support. If this build can come out anywhere near some of the builds I have seen on this forum I will be chuffed ;D
Cheers!
CR21
CR21:
Just a quick update:
I have made some progress on the other frame modifications, drawings are all completed for the rear sets ready for Christmas manufacture and replica pegs have been ordered.
The oil tank mounting on these bikes are a little fiddly, this is what I make of it so far:
The oil tank is 'suspended' into the frame, it is hung from the top from two L-shaped brackets and rests on rubber seats on the bottom supported by more L-shaped brackets either side like the reference image below:
Top mounting brackets (to be modified for a more triangular profile).Waiting for grommets to arrive to complete the profile:
Bottom brackets:
With the help of a member from the CB750 forum who has built a fantastic replica, I have managed to obtain measurements from his CR750 catch tank. Another piece of the jigsaw! Modelled up in CAD for future reference. This will be fabricated in Aluminium.
That is all for now,
Cheers
CR21
CR21:
Hi all,
The CR donor was removed from the shed:
After a long game of 'engine wrestle' the engine was removed from the frame and the rest of the parts stripped off!
What a lump!!
Now for a day of de-lugging and working out these chassis mods. Rearset fork bosses all machined up ready to accept the sheet-metal work:
More to come over the next few days,
Cheers!
CR21
CR21:
Made some progress today:
**** :o CB750K PURISTS LOOK AWAY NOW :o *****
5 hours of de-lugging later and the frame is sorted ;) Took a while as I did not want to damage the frame...
The most difficult of all was definitely the side-stand bosses, and I had two of them :'( :D
The frame looks much cleaner de-lugged, I must say I think that the build quality of these frames is pretty poor! Compared to the Yamaha frames that I have worked on its really rather poor :-\
I faced off a bit of tube to keep the frame from pulling in when removing and adding bracing in this area. Tank placed onto the frame for the first time it was good to see! (the seat is just being used for a mock-up I will not be using this for the final build).
On with the rear-set sheet metal work, pattern worked from, folded, cut back, jigged and welded. Then the final fit on the boss to be welded in place tomorrow morning and fitted.
Cheers!
CR21
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