CB400F Engine rebuild

[taysidedragon]

All the parts I need for the rebuild have arrived and the gear bush is sorted.
Primary drive rubbers and gasket set not in picture. Let the fun begin! 😁 (Attachment Link)

Eye candy - lovely what make are the pistons and who did you source them from I'm pretty certain I might end up needing some early next year.
?

The pistons are unbranded Japanese from Cruzinimage. They seem good quality and a very good price.
They arrived after just 6 days!

[McCabe-Thiele (Ted)]

Hope you can post some pictures and details  on fitting the pistons to the barrels. In my mind  it looks impossibly  fiddly presumably having to fit two at the same time then the second pair fighting against the weight of the barrels unless you have the engine on it's side.

It looks as though gudgeon pins just push through the piston & the little ends with a clip on each side or are they an interference fit as well?

[robvangulik]

it looks impossibly  fiddly presumably having to fit two at the same time then the second pair fighting against the weight of the barrels

Like everything it takes some practice
Just cut some wooden blocks to the right size to support the barrels halfway up, and take your time.

[taysidedragon]

Hope you can post some pictures and details  on fitting the pistons to the barrels. In my mind  it looks impossibly  fiddly presumably having to fit two at the same time then the second pair fighting against the weight of the barrels unless you have the engine on it's side.

It looks as though gudgeon pins just push through the piston & the little ends with a clip on each side or are they an interference fit as well?

Will do - if I've got a spare hand!

The gudgeon pins sometimes need a bit of heat on the piston to slide in or out.

[taysidedragon]

All those parts look reassuringly expensive 
Don't forget the Hondabond for the case joint!
Time to make a cuppa and get started on the adventure 
Good luck and keep the progress photos coming.

Yep. Got a tube of Hondabond HT. Forget to put it in the pic.
I haven't added up the cost yet, but got the Kawasaki primary chain from MSP, piston set from Cruzinimage
and o-rings etc from  Nurse Julie so did quite well on prices. 👍🔧🏍

Did a quick add up. Comes to just over £300, a bit more than I thought!
I've still got to get a couple of small things like new Dowty seals for the head.
The ones that were on it are well past it.

[Laverda Dave]

£300 for all those parts, you've done very well.
There was a thread on here about replacements for those dowty washers but I can't find it!

[McCabe-Thiele (Ted)]

I'd like to think my inevitable engine rebuild could be done in that budget!

[taysidedragon]

It would have been a lot more if I'd needed new main or big end shells. 😊

[taysidedragon]

Finally getting around to reassemble my engine. I've been delayed by the central heating boiler going on the blink, now I have to get a new boiler. 🤨

Anyhow, crankcases assembled and torqued down. Primary shaft and gear fitted then kickstart shaft and spring hooked up. New pistons fitted after checking ring gaps in the bores. Cylinders on, I fed the pistons and rings in by hand, middle ones first. They went in without any bother, one ring at a time, working the cylinders down gradually. I was very relieved when they were all in, no breakages! 🙂

Cylinder head on and torqued down.  Making progress,  should be finished soon. 👍

[Nurse Julie]

This all brings back memories of my engine, with the exciting stage of getting it all back together. That was 3 years ago, where have they gone 😢😢😢😢

[Bryanj]

Time flies when you have fun Julie, or so they tell me! Just got back from 8 days in wet Cornwall and cant figure out where the days went

[taysidedragon]

This all brings back memories of my engine, with the exciting stage of getting it all back together. That was 3 years ago, where have they gone 😢😢😢😢

Julie, your engine rebuild file has been a great help for me. I've delved into it a few times to confirm something that I wasn't sure about.  Thanks. 🙂🔧🔩