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Basket case to Cr750 rep.....hopefully!

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MarkCR750:

--- Quote from: MarkCR750 on October 27, 2017, 07:25:52 AM ---Good luck with the project, if you have no luck with the top yoke I have a cast one that just needs one face machining.

--- End quote ---

I’m struggling to upload the photos, used to be able to email to myself then save back to my phone to get the file small enough for the forum but now it’s saying it’s the wrong file type 🙄, pm me your email address and I’ll send the photos 👍

SteveD CB500K0:
What sort of photo files are you trying to upload? I can soon add another variant to the “allowed” list.


Sent from my iPhone using Tapatalk

burchy75:

--- Quote from: Trigger on October 29, 2017, 10:15:05 PM ---Sounds good, what type of oil jet is in the head ? This will tell you if the head is a good match for the barrels.  Am i working too fast for you  ;D

--- End quote ---

It looks like I have 4 of the early style heads and two early barrels in the box of bits that I bought, this includes the barrels and head that came off the KO engine itself.  Hopefully these should be ok to go straight on the K1 cases I have here.  It turns out I also have 2 later style heads as well, which I may end up using on the 76/77 engine I have here (at a later date).  The spare engine cases have an engine number of CB750E 2547990, which I believe is an 1976 F2 engine number and not a 76 K as I'd originally thought - can anyone else confirm this?

BigAl (Alan):
The engine No. 25***** is the F1 motor March 75 to Nov 76

burchy75:
I've been trying to make some headway with the carbs I have here.  As I have some rebuild kits on order for them at present I needed to get the old needles out of the floats, however looking inside them there was a world of hurt waiting for me with the tiny pan screws that hold the rod mechanism in place.

Now separate to this I'd heard about JIS head screwdrivers and their advantages over Philips heads with old Japanese bikes and having rounded a few of the pan screws in the past I thought I'd have a blast at grinding down a standard Philips to see if it made any difference in getting the screws out.

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Wow, is all I can say.  30 seconds on the grinder to take the tip off and angle the 4 edges a little and all 8 screws came out without any drama at all, even the two that were caked in rust or something equally as nasty.  I'm probably preaching to the converted on here as many of you have no doubt already done this but having cursed (a lot) when I've rounded screws in the past this felt like a nice easy win  :)

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I want to get the carbs rebuild if possible and then turn my attention to the frame that is currently dangling from the garage ceiling.  I'd like to bolt up some of the rear end and get the forks on, more to see the stance of the bike than anything else as I've only ever seen it in boxes and getting something that resembles a bike, even in these early build stages, will hopefully put a smile on my face and spur me on.

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