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CR750 replica build
CR21:
3D prints came out well, ready for the fit check at the weekend, I think the tubes will need some adjustment. These basic prints are very cost effective, the material cost is around £2!
If I need to adjust the tubes I can warm up and adjust the prototype and then work that back into the 3D model.
Cheers
CR21
Laverda Dave:
Amazing work yet again. How do you find the time to do this fantastic build!
I'd really like to see the finished article ridden by one of the magazines, get Alan Cathcart to test it👍.
CR21:
--- Quote from: Laverda Dave on April 16, 2025, 09:59:49 AM ---Amazing work yet again. How do you find the time to do this fantastic build!
I'd really like to see the finished article ridden by one of the magazines, get Alan Cathcart to test it👍.
--- End quote ---
Thanks Dave - as I have other comittments and builds on it is super slow - my first post on this thread was in 2016!
That would be great - perhaps one day!
Cheers,
CR21
CR21:
It has been a while since I did an update, and I am afraid it is only a small one!
Another piece of the jigsaw I have been working on is the oil cooler, a good friend who is also building a CR worked with me on this project to find a supplier, and with my drawing we had a small batch made, a couple of adjustments made during manufacture but I think they will do the job nicely, looking forward to trying them on the chassis. A surprisingly hard part to make/have made due to the specific welding/soldering required:
The 3D printed prototype, required some adjustments to the pipe angles before completing the drawing and sending to the supplier:
From the supplier:
The exhausts are a big part of the CR, I still intend on hydroforming my own but I have picked up some pipes during my hunt:
M-Tec exhausts, beautfiul quality and 'bolt on' but a little long/large for my liking:
Original CR exhaust, sadly only one pipe with a 'botched' header however it is very useful to have a proper pattern!
M-Tec exhaust left, original CR RHS:
Original CR, ignore the header:
I am just waiting for my hubs to be painted, the wheels are all booked in to be built.
Shocks, I managed to pick up some original shocks, kit items with 'forked' lowers and works items with eyelet lowers:
I am planning on running the eyelet type which require a modification to the swinging arm, part drawn in 3D, ready for machining:
]
Assembly drawing & historic image - credit to Nap!
Cheers,
CR21
Laverda Dave:
It may be little progress but it is important progress. That oil cooler must have cost a pretty penny to have made, even the 3d prototype would be expensive to make.
Love the throwaway comment of 'managed to pick up some original shocks and some works items' I assume you didn't have to trade a kidney for those ;D
Great to read an update, this is going to be a special bike when completed.
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