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CB750 Barn find project - First Timer

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Underdog1:

--- Quote from: Spitfire on July 24, 2016, 07:58:40 PM ---This might help finding a caliper.
http://www.sohc.co.uk/index.php/topic,1562.0.html

Cheers

Dennis

--- End quote ---

Yeah that may well come in handy, cheers bud!


--- Quote from: Rob.b on July 25, 2016, 09:06:13 PM ---Underdog,  I'm so sorry,  I seem to have inadvertently thrown a metaphorical spanner into your thread, now it's all about that fella on Youtube. Is he Australian Perhaps; and could that be why he builds engines upside down.  8)

I'm new here myself, but from what I've read.on this excellent forum I feel sure that you are eventually going to find all the information and help you could ever want.

Rob

--- End quote ---

Hah no worries!



So i only managed to get 30 minutes or so poking about the old girl today as i finished work late. Took the ignition off at the block connector, connected a good battery touched the spade connectors for the red and black wires and didn't get anything.. no electrics.



Hopefully this is a fault at my end as the advert did state that the bike turned over with a good battery, is there a better way to bypass the ignition?

Now I've got the lock off anyone know a way i can find the key code (on I'm assuming the lock barrel) without destroying it?).



Now the tanks off I'm a little confused by the fuel line set up.. the petcock has 2 outlets but i can only see one fuel line fitted (nothing was actually connected up though) which has a T junction to seemingly feed a each pair of carbs. So this set up means all the carbs are fed off just one petcock outlet.. I'm probably being an idiot here but whats the other petcock outlet for?  ;D




As a bonus, heres the inside of my petrol tank the dirty old girl

K2-K6:
Well I've never seen one built like that before i. e. upside down, seems like he's creating more problems than he's trying to solve. Maybe he can't put the barrels down onto already installed pistons and rods because he's had to cut away the bottom of them to clear the massive alloy rods and lost the taper to help lead the rings into the barrels.

The rods don't even look finished properly with some really big stress raisers built in for good measure, surely if you are going to run an alternative you'd want a better quality than standard.

And he kept rattling those exposed big end bolts against the crank journals!!!  if you drop the rods down onto the crank on a car engine, you'd place something like silicon hose over the threads to avoid contact with the crank.

Underdog1:
Another quick question, and inknow this can be a contentious issue...

Is running a 10w40 Semi synthetic oil API SL/CF ok for this bike?

Trigger:
It is not contentious, you need 10-40 mineral. The ignition should have a plug on it that plugs into the loom.

royhall:
Not seen that video for a while but from memory, I think he does it that way so he can fit one piston at a time instead of having to deal with all four. In avoiding that one small issue he creates many more issues. Really weird way of doing it.

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