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Offline Remcod

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Separate cases
« on: April 29, 2021, 01:37:15 AM »
I have to separate the cases of a 78a. Im sure all bolts are out but they will not separate. Any suggestions? These parts are unobtainable in europe so its nervous business.

Only thing still in place its the oilplate, but the manual says it can stay. Since im gonna iceblast the cases that must come out also i think. Any pointers on that?

Im used to work on cb750's just not an hondamatic

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« Last Edit: April 29, 2021, 01:41:10 AM by Remcod »
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Offline PeWe

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Re: Separate cases
« Reply #1 on: April 29, 2021, 05:17:26 AM »
I think you have missed an M6 bolt.
In starter motor area or a long one from under, close to clutch.
I have missed them a few times.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Remcod

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Re: Separate cases
« Reply #2 on: April 29, 2021, 10:13:39 AM »
Used some controlled force, got it. It was a rusty collar at the ignition points that was stuborn.

I hope the endcaps can be reused since they are n/a?

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Offline PeWe

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  • Posts: 15,708
  • Bike almost back to the 70's 2015
Re: Separate cases
« Reply #3 on: April 29, 2021, 10:24:38 AM »
cmsnl.com might have?
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Remcod

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Re: Separate cases
« Reply #4 on: April 29, 2021, 10:33:11 AM »
No they dont unfortunately

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Offline Remcod

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Re: Separate cases
« Reply #5 on: April 29, 2021, 11:14:16 AM »
Found the bigger one on ebay.
Anybody has a spare smaller one?
Part no 91208-393-003


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