Author Topic: '72 CB750K1/2 First time project  (Read 4860 times)

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Offline MauiK3

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Re: '72 CB750K1/2 First time project
« Reply #25 on: August 15, 2017, 09:05:35 AM »
Transmission parts that are in good shape
Oil pump, especially if the screen is sound
Crankshaft
Kick start parts
Alternator parts
Camshaft
Points advancer
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline BPellerine

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Re: '72 CB750K1/2 First time project
« Reply #26 on: August 15, 2017, 02:49:29 PM »
depending where you are going,alot of parts can be hard to get,I would try to keep all of the engine parts,and covers as they are all from the same engine,bill
1978 CB 750K ard and webers
another anfob

Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #27 on: August 18, 2017, 05:53:35 PM »
Is it worth taking the gear box apart? Thinking as I'm a newb to get a whole engine to slip in. And just keep external engine parts and top end....
Pulling piston out tmrw.
I still can't get the exhaust valves out, they don't slip out of the guides like the intakes do!?  Any advice is welcome pls!

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cb750 K2:Fraken bike project
CB750C 1980. resto project

Offline BPellerine

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Re: '72 CB750K1/2 First time project
« Reply #28 on: August 18, 2017, 07:17:27 PM »
if you have the springs off the valves they should come out,sometimes the old valve seals hold them a bit,or there could be some carbon or rust,a little wd and a light tap and they should come out,can you not take the bottom end as a unit?bill
1978 CB 750K ard and webers
another anfob

Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #29 on: August 18, 2017, 07:23:46 PM »
if you have the springs off the valves they should come out,sometimes the old valve seals hold them a bit,or there could be some carbon or rust,a little wd and a light tap and they should come out,can you not take the bottom end as a unit?bill
All the valves hit the guides badly. But I'll give it a few wacks. Not keeping the cases  fins cracked...bottom cracked too

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Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #30 on: August 19, 2017, 09:11:05 AM »
From what I see on YouTube. I just smack the valve guides with an 8mm socket to pop them out!? Comments?

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Offline BPellerine

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Re: '72 CB750K1/2 First time project
« Reply #31 on: August 19, 2017, 01:30:40 PM »
are you trying to take the springs off ?not sure what you are doing,you can use a socket to give the springs a little wack with a rubber mallet,but the collets will fly out if you are not careful,a pic would be helpful
1978 CB 750K ard and webers
another anfob

Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #32 on: August 19, 2017, 01:33:01 PM »
are you trying to take the springs off ?not sure what you are doing,you can use a socket to give the springs a little wack with a rubber mallet,but the collets will fly out if you are not careful,a pic would be helpful
Removing exhaust valves. Won't fit through sleeve
Here's a pic

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cb750 K2:Fraken bike project
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Offline BPellerine

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Re: '72 CB750K1/2 First time project
« Reply #33 on: August 19, 2017, 01:37:53 PM »
they should come out,they maybe mushroomed a bit,so check how far they go down,maybe a little,emery paper to polish a bit,and if that head is bad,those oiljets in there are very hard to get,some would take the head just to get the jets.by the way I am from nova scotia,bill
1978 CB 750K ard and webers
another anfob

Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #34 on: August 19, 2017, 01:44:38 PM »
they should come out,they maybe mushroomed a bit,so check how far they go down,maybe a little,emery paper to polish a bit,and if that head is bad,those oiljets in there are very hard to get,some would take the head just to get the jets.by the way I am from nova scotia,bill
Just smacked them. One out one seized...Strange. They must have warped...

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cb750 K2:Fraken bike project
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Offline BPellerine

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Re: '72 CB750K1/2 First time project
« Reply #35 on: August 19, 2017, 05:36:46 PM »
yeah you could have a bent valve,usually destroys the guide getting it out.bill
1978 CB 750K ard and webers
another anfob

Offline MadDogCanada

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Re: '72 CB750K1/2 First time project
« Reply #36 on: August 19, 2017, 05:45:02 PM »
yeah you could have a bent valve,usually destroys the guide getting it out.bill
Think all 4 of them were.. bigger hammer worked. Thx man

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cb750 K2:Fraken bike project
CB750C 1980. resto project