Author Topic: What does the 400 engine weigh without head & block ?  (Read 454 times)

Offline ka-ja

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Re: What does the 400 engine weigh without head & block ?
« Reply #15 on: February 06, 2021, 07:48:33 PM »
Definately dropping the frame over the engine is the easy option, even easier without the forks fitted, but it really helps to fit the sump after fitting the engine.
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Offline Macabethiele (Ted)

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Re: What does the 400 engine weigh without head & block ?
« Reply #16 on: February 07, 2021, 11:49:35 AM »
Yes I agree fitting the sump asap is a good idea to prevent possible damage & keep put contamination of any sort.
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Offline SeanFD

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Re: What does the 400 engine weigh without head & block ?
« Reply #17 on: February 08, 2021, 08:20:01 AM »
To put my 400 engine back in, I put a couple of lengths of threaded rod through the mounting holes, and then myself and assistant simply picked it up and, with some bubble wrap around the frame, put it in. It was easy - sump and oil filter were off

The 750 was a different matter: involving some pulleys mounted on a home made “gantry”, a couple of webbing ties, and a different assistant. No pics sadly, but one of a later effort involving a 450K1 gives the general idea

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CB750 K2 - Ridden from Belfast(SA)-2-Belfast(NI)!
CB750 K1 - The less, said the better!
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CB400F Supersport - It's rusty - not any more!

Offline Macabethiele (Ted)

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Re: What does the 400 engine weigh without head & block ?
« Reply #18 on: February 08, 2021, 09:36:15 AM »
To put my 400 engine back in, I put a couple of lengths of threaded rod through the mounting holes, and then myself and assistant simply picked it up and, with some bubble wrap around the frame, put it in. It was easy - sump and oil filter were off

The 750 was a different matter: involving some pulleys mounted on a home made “gantry”, a couple of webbing ties, and a different assistant. No pics sadly, but one of a later effort involving a 450K1 gives the general idea

(Attachment Link)

That sounds nice & easy what size rod / thread did you use or was it garage left overs?
I threw all my steel offcut bits & bobs about 30 years ago!
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Offline K2-K6

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Re: What does the 400 engine weigh without head & block ?
« Reply #19 on: February 08, 2021, 09:52:38 AM »
To protect frame finishes I've always used newspaper quite thick and wrapped round the tubes then secured with masking tape.  Very resistant to any contact, cheap and easy to slit the tape and pull out when installed.

For supporting an engine without work frame bolted to it, an old car tire is effective to sit it in any orientation.

Offline SeanFD

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Re: What does the 400 engine weigh without head & block ?
« Reply #20 on: February 08, 2021, 09:56:43 AM »
That sounds nice & easy what size rod / thread did you use or was it garage left overs?
I threw all my steel offcut bits & bobs about 30 years ago!

I honestly can't remember off the top of my head, and I am not in the same place as the bike now to check.

I think it was M10 for the front and M12 at the back lower mounting points. The parts book doesn't give sizes, but the mounting points I used are shown here:

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And the bolts here:

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Just see what'll fit in. Length wise, they just have to be long enough to allow you a good hold, so longer than the bolts, but if they are too long, they may start to bend - threaded rod that is.
CB750 K2 - Ridden from Belfast(SA)-2-Belfast(NI)!
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Offline SeanFD

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Re: What does the 400 engine weigh without head & block ?
« Reply #21 on: February 08, 2021, 09:58:58 AM »
To protect frame finishes I've always used newspaper quite thick and wrapped round the tubes then secured with masking tape.  Very resistant to any contact, cheap and easy to slit the tape and pull out when installed.

For supporting an engine without work frame bolted to it, an old car tire is effective to sit it in any orientation.

Who reads a newspaper these days?  ;D ;D

But I like the car tyre idea; never thought of that!
CB750 K2 - Ridden from Belfast(SA)-2-Belfast(NI)!
CB750 K1 - The less, said the better!
CB450 K1 - A work in progress.
CB400F Supersport - It's rusty - not any more!

Offline Macabethiele (Ted)

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Re: What does the 400 engine weigh without head & block ?
« Reply #22 on: February 08, 2021, 12:13:39 PM »
Here's how I put it back into the frame Ted. Engine on the floor and lifted the frame over it. I put a couple of engine bolts in and put the sump on followed by the wheels and just lifted it up, nice and easy.

That looks a good way - especially if my brother isn't available to act as a human crane.
Honda CB400F2 under restoration
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Offline paul G

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Re: What does the 400 engine weigh without head & block ?
« Reply #23 on: February 08, 2021, 12:20:57 PM »
Frame over the engine every time makes it a doddle  ;D
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