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CR750 replica build
CR21:
--- Quote from: K2-K6 on January 04, 2017, 10:37:30 PM ---Nice fabrication work.
I noticed that the seat tab example photo shows the tabs as a Z shape so that they've got more weld shear plane rather than just butt welded to the flat steel.
Did you have to heat the heavy gauge footpeg block while welding to get a good flow into the weld? As it's usually quiet difficult to get two different metal thicknesses to melt at the same time. I'm just interested in the method he's used.
Did you get a solution for the tank strap with that rubber section you have previously asked about?
--- End quote ---
Hi K2-K6,
Thanks. yes if you read the end of my last post this is what I am referring too, the ones that I will use on the bike will be welded along the flat section for strength, I also think these look neat just welded up each side of the flat. The torch would have been directed predominately towards the boss to prevent the sheet from melting away, aside from that I guess it's just experience!
Yes that is all sorted, more to come :)
Cheers
CR21
paul G:
--- Quote from: CR21 on January 04, 2017, 10:53:49 PM ---
--- Quote from: K2-K6 on January 04, 2017, 10:37:30 PM ---Nice fabrication work.
I noticed that the seat tab example photo shows the tabs as a Z shape so that they've got more weld shear plane rather than just butt welded to the flat steel.
Did you have to heat the heavy gauge footpeg block while welding to get a good flow into the weld? As it's usually quiet difficult to get two different metal thicknesses to melt at the same time. I'm just interested in the method he's used.
Did you get a solution for the tank strap with that rubber section you have previously asked about?
--- End quote ---
Hi K2-K6,
Thanks. yes if you read the end of my last post this is what I am referring too, the ones that I will use on the bike will be welded along the flat section for strength, I also think these look neat just welded up each side of the flat. The torch would have been directed predominately towards the boss to prevent the sheet from melting away, aside from that I guess it's just experience!
Yes that is all sorted, more to come :)
Cheers
CR21
Some stunning work going on here ;D ;D
--- End quote ---
CR21:
Thanks guys it is good to get stuck in and focus on the build ;)
Some progress from today!
- Brace welded
- Brake cable stops made
- Front spigot made for the fairing carrier
- Welded the tank strap loops around the rubbers
- Debossed the top yoke and started to re-shape to 'CR spec'
Tank/seat brace welded up and linished back:
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Offered up to the frame and tank etc:
I shaped either side of the bracket to fit tightly between the frame tubes, however I was unhappy with the rear of the brace where it was 'open'. So this was plated up, linished back and then shaped the same as the front section to fill the gap:
Measured out using the shock mounts as a datum:
Now ready for welding tomorrow morning:
Front spigot made and shaped out of steel tube, quick bit of turning to make the clamping boss. I shaped the rear of this with a file for it to sit nicely onto the tube and for a better fit whilst welding. I will add the slit after welding and will drill out one side of the clamp.
Offered up to the frame to check the fit and angle, still to be confirmed and welded tomorrow:
As the rear brake is cable operated, originally the cable would have sat down into a boss and was lock wired into place. Luckily a good friend of mine has found an original cable that I can borrow! So I thought I better get on and get the bosses made so that they can be welded onto the rearset plates. I had drawn the part up in CAD and produced a drawing, so over to a mate for machining previously on this thread.
The original cable:
As the part is relatively simple the machining process can all be done on the 4th axis from a piece of standard barstock in one operation with no need to reposition the workpiece. Then these can be cut-off and then drilled from the back just to finish them off!
De-burred and ready to go!
Chuffed with how this detail has come out :D especially the hole for the lockwire!
Frame mods still to do:
- Lower frame tabs for the fairing.
- Oiltank mounts.
- Gear shaft changover kit bush.
- Repair frame tube where the rear brake tube was removed.
- Seat and tank hooks to be added to the brace
Another day of it tomorrow, hopefully will get most of the welding finished off on the frame.
Cheers!
CR21
yozzer74:
Loving this build
paul G:
--- Quote from: yozzer74 on January 06, 2017, 12:01:32 AM ---Loving this build
--- End quote ---
Me too detail is superb ;D
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