Author Topic: Removing and Installing a CB750 Engine  (Read 2096 times)

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Offline BenelliSEI

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Re: Removing and Installing a CB750 Engine
« Reply #50 on: March 12, 2023, 05:59:46 AM »
I remember I painted up the engine cases etc. on an 836 and had it looking very purdy , mounted up the carbs etc. and when I turned on the gas a float got stuck and dumped gas all over my nice fresh new silver paint !  ;D  Note to self make sure drain hoses are connected.

We’ve all done it!

Offline MauiK3

  • A K3 is saved
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Re: Removing and Installing a CB750 Engine
« Reply #51 on: March 12, 2023, 08:09:50 AM »
Nice job Steve-o, it is a great way to do it.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline PeWe

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Re: Removing and Installing a CB750 Engine
« Reply #52 on: March 12, 2023, 10:58:02 AM »
If bike has frame kit and engine is to be taken apart:
Remove carbs, head, cylinder and pistons while in frame plus drain oil, remove oil lines etc

Now easier to swing out the bottom end with a strap alone.

I have done that twice. I even removed cyl studs that were easy to remove. I have replaced them before, HD studs .

Last time no help to lift bottom end up to the bench so everything completely apart on the floor.
Engine was resting on thick soft bolster.
When bottom end job was done, assembled with everything tightened. I swung it back into frame. I stand over the bike so not that hard.

Pistons, cylinder, head etc. mounted in frame.

The endless riveted drive chain does not need to be opened.
Make max slack and lift front sprocket out of the shaft with chain and push backwards.
This is how I remove rear wheel at every tire change.
Then chain guard to be removed too.

But I have a complete engine swap to do. From one bike to another.
Or maybe only lift it out. (Another bottom end goes in since that bike also has a frame kit)

Rest on the floor on its side on wooden plank so ignition side is not resting on floor and wrap the frame around it, tugn over and continue the build.
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