CB750 Barn find project - First Timer

[hairygit]

Did you just remove it from the engine, or dismantle it as well?

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[DaveB]

What instructions do you need, the timing unit or re timing the camshaft?

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Reassembling the timing unit. Doesn't seem to be featured in any of the manuals I've got

This video might help?

https://www.youtube.com/watch?v=InPZuM_K9kY

Regards,

[Underdog1]

What instructions do you need, the timing unit or re timing the camshaft?

Sent from my X6pro using Tapatalk

Reassembling the timing unit. Doesn't seem to be featured in any of the manuals I've got

This video might help?

https://www.youtube.com/watch?v=InPZuM_K9kY

Regards,

Yeah looks easy, not sure why I had a spastic moment there.. was probably running low on coffee at the time.

As a look forward I've got some quotes for powdercoating, there's basically 2 which look good and aren't too far from a route I often travel (there's not much local to me.

The first is PCL powder coating in Bridgewater

https://m.facebook.com/PCL-Powder-Coating-340782079286190/?ref=page_internal&mt_nav=1

They said a medium to large frame would be around £160-170 inc blasting etc which is a little more than I was expecting. I asked them about spoked wheels and they said the can do them delaced or as a single unit for £55/wheel provided the chrome is in ok nick.

Secondly I called Perfectadent in Bridgend.

https://en-gb.facebook.com/Perfectadent/

They said a frame is £100+VAT which is reasonable, I asked them about spoked wheels and he said they can do them as a single unit but they don't offer a warranty on the spokes as they said it can be hit or miss how long the coat lasts. He recommended sourcing some black spokes.

To be fair it made sense what the guy at perfectadent said so I may go down that route. Looking at their FB page they do a lot of frames etc.

Does anyone know where I could get the right sized spokes in black??

[Underdog1]

Got the timing all squared away earlier today




Annoyingly I've just noticed that the cam tower for cyl 1&2 is significantly damaged on exhaust side  all the others look fine and the rocker spindles all look good. I remember when I was taking the top end apart following a rubbish Haynes manual I've got it never mentioned backing the tappets out before removing the spindles and in my noobness I just tapped the spindles out with a screwdriver and hammer (well as far as I can remember that was the only one which needed it). Must have damaged it in the process as there's no corresponding wear on the spindle.



Annoyed is an understatement but everything's a learning curve for me.

[Trigger]

That is a easy repair 

[Underdog1]

That is a easy repair 

As in just sand it smooth??

[Nurse Julie]

Trig says just remove the burr with a sharp instrument, and then use a very fine wet and dry around a dowel. Trig would ream it.

[Underdog1]

Trig says just remove the burr with a sharp instrument, and then use a very fine wet and dry around a dowel. Trig would ream it.

Sweet, I'll give it a go

[Bryanj]

Shaft does't turn in there anyway so as long as its a decent load surface it's OK

[Underdog1]

Shaft does't turn in there anyway so as long as its a decent load surface it's OK

Yeah only just realised that! I though the shaft turned in the cam towers rather than the rocker arms turning on the shaft   

Sanded it down anyway and it's all smooth now.

Assembled the rocker arms no problem and then came across a baggy of 8 little metal 12mm cylinder pin things suspiciously like the ones that go between the cylinders and head.. doh! Definitely not ideal going so long between stripping and reassembling.

I remember installing the 8 rubber bits (which sit around the metal pins) and remember thinking at the time they seemed a bit loose just sitting there..

How much of a risk is it to leave as is? What's the purpose of the metal pins?

I have the creeping feeling the head is about to come off again!

EDIT: seems these metal pings weren't present until the K3, probably missed them out as I was following hondaman shook where he rebuilds an earlier bike.

[Nurse Julie]

Honda didn't put them there for no reason, looks like the head is coming off again as it's not an earlier head.

[Underdog1]

Honda didn't put them there for no reason, looks like the head is coming off again as it's not an earlier head.

Haha oh dear. Is that another new head gasket too then?

[Nurse Julie]

Which type did you use?

[Underdog1]

Which type did you use?

Vesrah, its a relatively thick matted metal fibre looking one

Edit:

This one
http://4into1.com/vesrah-cylinder-head-gasket-hg-1022-honda-cb750-1969-1978/

[Nurse Julie]

You can use that again