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CR750 replica build
onethumb:
Sweet work. Makes me embarrassed to put my build up now.
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Johnwebley:
this is brilliant,
the quality is superb,did you do the folding/bending and welding ??
CR21:
Thanks guys!
Yes I play around with the fabrication and the odd bit of machining, a good friend of mine is 100 times better than welding than me, and you guessed it he does my welding :)
Cheers CR21
CR21:
Hi all,
Made some progress today:
Rearset plates all welded up now, and the footpegs fit nicely in the slots. I am going to tweak the footpegs to the brackets so that they sit level on the frame at a later date as I want to make sure they are going to be level when weight is placed onto them. I took this into account when drawing the footpeg bosses.
I still have the brake pedal stop and cable guide to add, but again I will wait until the rear-sets are on the bike and the assemblies are 'dry built'.
In order to jig the rear-sets accurately onto each frame tube I cut a piece of tube and faced off each end on the lathe. This keeps the brackets parallel to each other when they are tacked onto the frame:
The first attempt at shaping the rear-set to fit around the frame tube. This needs tweaking again to bring it closer to the frame before the final fitting, tedious but very important ???
Onto the frame and seat brace, this rather surprisingly fits between the seat and the frame ;) The seat slides into two small hooks on this bracket and the tank strap also hooks onto it. This brace is shaped to accept the oil filler for the tank, similar to the shown in the image below:
L shape folded on the folding table:
Welded:
Linished back and marked out oversize so that it can be fitted to the frame:
Cut on the bandsaw supported by a 'strategically selected' piece of palletwood:
Now for the infilling strip for the curved session, I cut a strip and then rolled it to fit the radius:
All blocked up for tack welding and seaming in the morning. Of course this will be linished back afterwards:
I started to play with the seat hooks at the end of the day, however I have decided to make them again so that they can be welded properly along another folded edge like the image of the other bracket above. The gauge of material for the hooks looks heavy here, but I feel that it is needed to secure the seat properly as the tab is so small.
All for now hopefully the frame will be all welded up tomorrow!
Cheers
CR21
K2-K6:
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?
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