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CR750 replica build

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CR21:

--- Quote from: captaink on May 01, 2017, 01:08:57 PM ---Now that would be a challenge a complete hub !  ???

I haven't made a brake splitter as yet, with your machining skills though that should be an easy one for you.
Honda sounds nice, my other CR Replica sounds like that, needs to tick over at 4000 rpm though, a mate of mine says he will take it round Brands for me, but he is an ex BSB rider with no fear.

Regards Keith

--- End quote ---

Hi Keith,

It sure would be, that Is what I am aiming for... Nice!

Cheers
CR21

CR21:
Quick update from today:

Spent most of today pondering about an oil tank  ::) ::) I must say it is certainly a challenge to get this thing in a sensible place!! The alignment is dependent on the breather routing, frame brackets and spacing, as well as the seat. Also the tank does not have any flat surfaces so that helps a lot  ;D ;D

Anyway, progress in images, added the frame brace, cut the frame at the back ready to accept the repositioned seat brace and new hoop. Tank in situ ready for some more thinking and lugging tomorrow  ;)













Cheers
CR21

philward:
Oil tank mounting has been my biggest challenge too Scott - still not 100% happy but its staying where it is now!

CR21:
Phil - it has certainly been fiddly!!

A bit more progress from today:

Knocked up some hanger brackets and spigots, turned bosses for the rubbers to sit on, with a simple folded bracket; these accept an original Honda rubber mounting. Tacked in place for now to check the wheel clearance and hose runs at a later date. The lower brackets are still on the list!





Trimmed the rear brace from the frame offcut, this will be repositioned and lowered on the frame, the original Honda pressing was pretty poor so I took the chance to straighten the edge before it goes back on:





Folded up the rear tank strap mounting, I wanted to get a fair bit of stretch on the rubber to keep it strong on the mountings, having the double fold in the bracket provides more strength for the weld area. 







Onto the rear brake pedal. I bought a rough casting of an original brake pedal, this needed a lot of cleaning up and a bush pressing into it. The casting quality is not great, but probably reflects the era. Set up the pedal in the mill and skimmed the gate off of the casting, as well as facing off both of the bushing faces. Hole bored slightly undersized for an interference fit, heated the pedal to around 100 degrees and then pressed in the bush.



More heat needed!!



Pressed into place, lots of tidying up of the rough casting to be done:



Took the triple tree off and extended the lock stops.

That is all for now! The seat mounts I will machine up to get those smart as they will be difficult to fabricate from sheet material due to the tight double folds. Still got to do the following to the frame:

- Mirrored horn bracket for the oil cooler mount.
- Seat mounts and rear hoop with repositioned frame brace.
- Fit fairing and confirm front spigot location and angle.
- Lower oil tank mounts.
- Look into oil tank breather routing and catch tank.

Cheers
CR21

philward:
Looking good Scott. Ref the mirrored horn mounting for the oil cooler - after I mounted the mirrored bracket, I had to make another bracket/plate to lower the cooler to avoid the cooler's exit's pointing at the side of the tank
Phil

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