Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: yozzer74 on October 01, 2017, 09:27:05 PM
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Bit of a random question.what sort of cost are you looking at for a total engine rebuild on 400four . chains seals shells ect.
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Camchain only, all seals, gaskets, camchain guide and tensioner blade comes to around £200, mostly genuine stuff. I've just done my spare 400, no shells needed, cam chain horseshoe repaired by me with new rivet made on own lathe. All work carried out by me including painting cases and re zinc plating all bolts. I can't imagine anyone doing it commercially for £400.
Ian
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Thanks I would be having a go at doing it my self
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Thanks I would be having a go at doing it my self
You and me both then Yozzer. I'm taking the engine out of my 400 probably this week for a complete overhaul. We can compare broken and rattley bits as we progress ;D ;D
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I'll let you go first :D
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I'll let you go first :D
Haha, OK. I have a nasty rattle to investigate so it may take some time. But, I will do everything and change everything I can whilst in there. As him indoors keeps reminding me ' do it right and do it once' ;D ;D ;D
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Thanks I would be having a go at doing it my self
You and me both then Yozzer. I'm taking the engine out of my 400 probably this week for a complete overhaul. We can compare broken and rattley bits as we progress ;D ;D
Don't forget the pictures Julie especially the one of you with your hands around Triggers neck ;D ;D ;)
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Thanks I would be having a go at doing it my self
You and me both then Yozzer. I'm taking the engine out of my 400 probably this week for a complete overhaul. We can compare broken and rattley bits as we progress ;D ;D
Don't forget the pictures Julie especially the one of you with your hands around Triggers neck ;D ;D ;)
It could get nasty Paul. I'm not the best person in the world for listening to peoples advice at the best if times. I can't even say to Trig 'so you think you know better' or 'what the hell do you know about it' .........so, there could be testing times ahead ::) ::) ::)
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Based on that ^^^^ Julie, I'm so looking forward to both yours and Yozzer's rebuilds! 8)
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Yeh and i'll sit in the background absorbing info and do mine on the QT! (in my dreams!)
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Thanks I would be having a go at doing it my self
You and me both then Yozzer. I'm taking the engine out of my 400 probably this week for a complete overhaul. We can compare broken and rattley bits as we progress ;D ;D
Don't forget the pictures Julie especially the one of you with your hands around Triggers neck ;D ;D ;)
Second thoughts forget the pictures can we have a video blog :) :) :)
It could get nasty Paul. I'm not the best person in the world for listening to peoples advice at the best if times. I can't even say to Trig 'so you think you know better' or 'what the hell do you know about it' .........so, there could be testing times ahead ::) ::) ::)
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Thanks I would be having a go at doing it my self
You and me both then Yozzer. I'm taking the engine out of my 400 probably this week for a complete overhaul. We can compare broken and rattley bits as we progress ;D ;D
Don't forget the pictures Julie especially the one of you with your hands around Triggers neck ;D ;D ;)
Second thoughts forget the pictures can we have a video blog :) :) :)
It could get nasty Paul. I'm not the best person in the world for listening to peoples advice at the best if times. I can't even say to Trig 'so you think you know better' or 'what the hell do you know about it' .........so, there could be testing times ahead ::) ::) ::)
Video blog, your having a laugh, I'm sure it's not advisable to film murder Paul. Anyway, I will have enough trouble just finding the right size spanners / sockets / hammers etc to worry about filming it !!!. I will start a thread on it though so you can all have a laugh ;D ;D
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Fabulous timing for a couple of 400 rebuilds !
I'm half way through my rebuild with engine stripped and cleaned, but a trip to the hospital has put things on hold for a bit, so a couple of rebuild threads will hopefully get me back into it !
Can I ask which ever one of you gets their head off first to give me a cylinder liner OD dimension please so I can check if mine is still std
Many thanks, and good luck !
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I am keen to watch this thread!!
Out of interest would you only strip if there was an issue.. my 76 has done 31k, runs fine, no smoke, no rattles and revs and pulls nicely. I see so many people doing refurbs that strip the engine.
As I have no issues I'm tempted to give the 400 a good service, lick of fresh paint , and a full tune up and get some miles on her... and see how she does. Would most agree this is the best policy?
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I am keen to watch this thread!!
Out of interest would you only strip if there was an issue.. my 76 has done 31k, runs fine, no smoke, no rattles and revs and pulls nicely. I see so many people doing refurbs that strip the engine.
As I have no issues I'm tempted to give the 400 a good service, lick of fresh paint , and a full tune up and get some miles on her... and see how she does. Would most agree this is the best policy?
Yes !! it sounds a good settled motor,working well,all parts ok,
guess its just about run in !!
run and enjoy ,just keep changing the oil and filters
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Thanks Jon, I feel like I'm cheating my rebuild build not breaking into the engine but its fine and just needs a tidy up and some paint and will look and run like new.
Of course if she develops an issue later down the road we can tackle it then.. but even after a rebuild problems can occur so I'll leave alone for now!
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Fabulous timing for a couple of 400 rebuilds !
I'm half way through my rebuild with engine stripped and cleaned, but a trip to the hospital has put things on hold for a bit, so a couple of rebuild threads will hopefully get me back into it !
Can I ask which ever one of you gets their head off first to give me a cylinder liner OD dimension please so I can check if mine is still std
Many thanks, and good luck !
I have just measured the OD of my liners and make them 56.95. At the moment I'm assuming mine are STD.
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Thanks Julie, that's very helpful !
Good luck with your rebuild !
Andy
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Fabulous timing for a couple of 400 rebuilds !
I'm half way through my rebuild with engine stripped and cleaned, but a trip to the hospital has put things on hold for a bit, so a couple of rebuild threads will hopefully get me back into it !
Can I ask which ever one of you gets their head off first to give me a cylinder liner OD dimension please so I can check if mine is still std
Many thanks, and good luck !
I have just measured the OD of my liners and make them 56.95. At the moment I'm assuming mine are STD.
Sorry to resurrect an old thread but I was reading through lots of threads and happened to see where Julie measured the liner at 56.95... NOW I know why trigger doesnt like Big Bore kits.. like the 466 at 54.5mm plus clearance that leaves next to nothing on the liner... Note to self... Dont ever think of a 466 Big Bore Kit ever again..
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I’ll bet Jock Kerr made a kit like that. A couple of mm was as good as a mile!
Sent from my iPhone using Tapatalk
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I would be interested to hear if anyone has any experience with the 54.5mm big bore kits ?
My engine had 54mm Yoshi pistons fitted when i stripped it and measured up on max piston / bore tolerance. Bores were slightly oval and new 54mm rings not available, so I figured the 54.5mm kit was an option when I struggled to find another decent set of barrels. Engine is going back together now, so we'll see what happens, and in the mean time I will keep an eye out for a set of barrels in case I have a drama !
Andy
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I had a similar issue in that the bike had previously had a Yoshimura 54mm kit and I needed to replace broken rings. In the end I went for a Cruzin Image 54.5 kit pistons / rings/ head gasket for the same price I was going to have to pay for the Yoshimura rings. (Local Engineering shop bored it as necessary) Needed care getting the pistons / rings back in with virtually no chamfer left, but runs a treat now. I don't abuse the engine though. Rest of the bike is standard ie with airbox and original jets.
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That's reassuring - thanks for the feedback !
It will be interesting to see if the added capacity gives a noticable improvement in torque - looking forward to finding some time to get it back together !
Andy
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Just catching up on some past threads. To go back to the original question ' how much will it cost', my CB400/4 engine rebuild came in at a tad under £1600 inc parts, labour and all machine work. Now I was very lucky as I only had to pay for parts as Trig did all the machine work for me FOC and mine and his labour cost nothing. But it just proves that a full engine job is in no way a cheap thing to do, especially if there is damage to some of the internals that need repair work as mine did.
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Your rebuild, Julie, needed an awful lot doing. The head welding, new pistons and rings et bloody cetera. My rebuild only cost hundred or so because the cam chain/ primary chain are fairly new. To be realistic; new chains, piston rings,gasket set, paint, the odd bolt where they've been chewed up. I'd say around £400. Spread out over a few weeks and her indoors won't even notice.
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Yes Mike, it did need a lot of work doing. If an overhaul is being done just because the engine is 'tired' or burning a bit of oil, the cost would be minimal. I think what a lot of owners do is assume their engine just needs minimal work (as I did with mine before stripping it) but when they get the engine apart they find machine work is required and parts needed that they hadn't reckoned on having to change.
I agree with your figure of around £400 just for a minimal overhaul but more if your changing chains / shells / valve guides etc.