The BEST Way To Install a Honda CB750 Engine Into a Frame | CB750 SOHC Cafe Racer Project Bike | 22
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- เผยแพร่เมื่อ 6 ส.ค. 2023
- The BEST Way To Install a Honda CB750 Engine Into a Frame | CB750 SOHC Cafe Racer Project Bike | 22
In this video with the help of my family I put the engine back into the frame of my CB750 SOHC Cafe Racer project bike. It is a very heavy engine, and only just fits into the frame.
The wisdom seems to be that it is best to fit the frame around the engine, with it on the floor. This would be because the frame is a lot lighter to move around. Never wanting to make things easy, I have built up the frame into a full rolling chassis, so the weight advantage wasn’t quite as much in our favour.
I realised that even when you are fitting the frame to the engine it will only go in from the left hand side. There are two removable bracket on that side, but even with these removed the engine doesn’t just slip in.
It took both my son and I to manhandle the frame with my lady wife helping to finesse it into the frame. Because it wasn’t just a bare frame, it did take a little more grunting and groaning than we had hoped.
Luckily, the engine went in quite well in the end, and there was very little damage done. The exhaust studs did take a little paint off one of the downtubes, but it should be reasonably easy to fix.
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![Honda CB750 - High HP Engine Build [Relaxed]](http://i.ytimg.com/vi/TuM9K6yi0go/mqdefault.jpg)
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""We need your mother." At that point I had to stop the video and show it to my Yorkshire-born wife, who has been invaluable when it comes to helping extricate me from motorcycle-related maintenance jams. Sometimes you just need a good Yorkshire lass.
Hahaha! Absolutely! Sometimes you just have to call in the cavalry. She always steps in when needed luckily. 😆
Don't know how you got it in without removing the exhaust studs. Well done.
They did make it pretty tight :) I think having the wheels on was what made it a bit ambitious!
Loving the series. Boy oh boy it's better to lay just the frame over the engine and not a rolling chassis. Bloody good effort getting that lump in though! 😎
Thanks. It was a bit heavy with all of the running gear. Thanks God it's in, let's hope it doesn't have to come out again too soon :)
Very good, I do this all the times because being alone but with the naked frame only witout fork,wheels : frame 16 kg vs engine 50 kg.
Way to go, next time I might leave the wheels off :)
Excelente determinacion, magnifico trabajo. Gracias Dios.
Gracias por tus amables palabras. Espero poder mantener la determinación.
I’ve seen peeps put polyethylene tubing Sliced over the frame tubes nice work boys
That sounds like a great idea, but the damage wasn't too bad. I suspect if we had had a bare frame we wouldn't have had any.
To me to you. To you to me. LOL. Love your videos mate
Thanks 👍 I absolutely love the Chuckle Brothers, even took the young gun to see them when he was a child. Never thought we would be stealing their lines.
Come to beautiful Northern New Mexico to help me!!!
Send a ticket :) Thanks for the invite it is very tempting.
Well Done. Good Idea laying the Bike over the Engine. I'll try that!
Quite a few commentors had recommended this on previous videos. I think next time I would do it before building up the rolling chassis. There was also advice to remove the exhaust studs, which I think would be a good idea. Maybe next time. Good luck.
Nice work, a bit of fuss but not too much.
Thanks. Adding the wheels might have just been a little too much. But it all came good in the end.
Did the same on my 750K4 years many years ago. Slit some clear plastic tubing for frame protection, and fabricated a pair of lifting bars. Long time ago, but I think the front bar was secured at both sides, and the rear located into the right side of the engine lug only, so to allow securing the back of the engine first, with a jack under the sump taking the weight so I could unbolt the front bar and ease the front down into alignment.
It all went surprisingly well, especially as my glamourous assistant in her pink fluffy slippers, weighed considerably less than engine..
Great description of your memory. Footwear always seems to be a feature. I suspect if I had insisted on pink fluffy slippers I might have been missing the extra help:)
Was this originally an F model? I saw the oil tank and assumed K7 or K8 but then you said the engine mounting bracket was only on the right. K7/K8 has brackets on both sides. What sort of sorcery is happening here? At any rate, you guys do some serious quality work. I could swear this was a new bike.
The frame VIN is a CB750F supersport from '76 and the engine started out as an F2 but has a K8 top end now. Thanks for your compliments, but to be honest the bike does look better on camera, unlike me :)
Well done lads a bit of huffing and puffing always gets the job done .😮😅
Thanks, I didn't even end up with a bad back!
Just finished binging this series, and as an aspiring hobby-mechanic, I'm learning a lot! Thanks for the great content, looking forward to the next one :)
Welcome aboard! I hope you have looked at our back catalogue, I still miss the blue CB, and the gold one too :)
I have seen people tie the engine to a 2x4 stud and lift it with ease into the upright frame.
Yes I've seen that too. I think get three mates around is probably the best method. It is just so heavy, laying it down would have been much simpler with a bare frame. Every day is a school day :)
Nah!! what a mess, 3 people struggling!!! I tied my 900 up straight then on a trolley jack with a wooden base trundled it in up, down, back,forward no probs. That Deffo seems like the hard way to do it.
It was such fun. Out of interest a 900 what? Does it go into the frame from the side? Not to worry I do hope you enjoyed it though.
Yes straight in the side, and it’s a Honda cb900f 1979 dohc, I don’t know how to send you a picture tho
Well done! I know youve done it now but just fyi I ratchet strapped a piece of 2x4 onto the back of the engine and two of us lifted the engine straight in. Maybe we were lucky - a lot has to line up. Anyway - it's in now and looking forward to hearing her run.
In hind sight, maybe the 2 by 4 method might have been the one for this time, with the rolling chassis having been built up. But the engine on the ground would be a lot easier with a bare frame. It is all part of life's rich tapestry.
Learned this the hard way with my cb450 😂
Wait until you see the next engine going in. Looks like we have learned some lessons. :)
I reckon I’m about a month away from attempting to fit the engine into my BMW project. Is Liz available ? I’m told I make a mean cup of tea 😉
It'll take more than a mean cup of tea! :) But we're looking at a BMW engine in some of our other videos. Good luck with your build.
This is what I do too, only I put the frame on the engine itself, it comes out better :)
Seems to be the way to go. If you don't have 4 burly buddies handy.
Just sayin'... but it must be great to be able to go down to a local hardware store and all the screwdrivers, nuts and bolts are METRIC! I wonder how many Honda screw-head bolts I ruined before I realized that Phillips was the wrong tool for the job.
JIS aren't commonly available here in the UK, but everything is metric. Which is great until you start working on an older British bike. They end up all just challenges to keep your brain young.
Great teamwork!!!! Extra hands are sometimes needed. 😊 Exciting time now! Good luck!
Thanks Mullie' Team work makes the dream work so they say. Now lets find out if the bugger will start, and stay that way.
well done, iv got to do the same at some time, I've got to take engine out to replace head gasket.
Take a look back at when we took this one out, I find it really helps to see how others have done. I would fit the engine back in the frame sooner next time, amazing how much weight the wheels and forks added.
Beaut job on the engine she looks awesome
Thanks 👍 I can't wait to hear it run. Not got there yet.
Beautiful engine from Honda
@@H-M-78 They do look nice, but boy are they heavy!
Hiya I was just watching your great work on body underseal with 447.. I restored my 1969 Triumph Spitfire MK3 25 years ago still got car and. My stone chip and rust protection still good on it so it pays to put in the work .
One random question what do you think about your car creeper never got one myself Kev East Devon 👍👍
Hi Kev, that bodes very well for the work we've done on the BMW E30 project then! It was a bloody unpleasant job getting underseal on.
Ahh the creeper is a brilliant idea, but there are a few things to watch out for. I'd get a higher-quality one next time.
If you get one with cheap small wheels, it won't like to roll on a floor with any imperfections to its surface once you're on it.
While it's handy that ours can double as a stool, due to the design, it doesn't hold you as low to the ground when you're on it flat, so if you're working under axel stands you can find you're not as low to the ground as you'd like to be for room to work.
Next time I'll be picking one that avoids these frustrations. 😃
Hope that helps!
@@SPANNERRASH Thanks for all the advice brilliant Kev👍
I seem to remember suggesting you did it frame onto engine a long long time ago Les!, it’s been a journey, but it’s been really interesting all along 👍, maybe I should have mentioned which side to do it from 🤔, and that I protected the frame with some leather from an old Sofa, and that the engine was dry, and that I didn’t have any cycle parts on the frame 🤔, come to think of it there’s lots of things I should have mentioned 🤔🙂🙂
You don't mention :) I remember you putting it in a comment. I know we could have done it better, we could have done all of the things you mention now. But, Hey, it worked out, very little damage, and I now have a bike back on its wheels. Now let's see if we can get it running. You have to enjoy the journey.
@@SPANNERRASHwell it went ok really, there would have been more scratches trying to lift it into the frame no doubt, those engines are incredibly heavy!, can’t wait to see the finished article 👍👍
i want to build a custom bobber hard tail with a cb 750
Sounds like a really interesting build go for it.
i owned a 1973 cb Honda 750 those bikes have mucho power they dont make them like that anymore and if someone rebuilds and tunes it up you have a hot rod on 2 wheels
They really don't make them like that anymore. Great bikes.
Could prob use another hand
Or two! Ha :)
You know it's going to get serious when wife needs to get involved ! Absolutely love those videos and the chanel - awesome work !! I'll do mine with the power hoist keeping the engine above the frame and slowly putting it into the frame so very similar to you. I also heard that putting actual frame into the sitting engine is even easier but that's just an overkill i think. Getting engine out and in is the most difficult job to do on those bikes !
Thanks for the positive thoughts. She doesn't mind really !! Modern bike engines are just as heavy but at least they usually fall out the bottom :)
Next time put the engine on a milk crate and then lower JUST the frame over it
I'm not sure that would have helped. We would have had to lift it higher, and it felt heavy enough. This engine wont go into the frame from below, so lying on it's side is the only way.
@SPANNERRASH I mean lowing just the frame on to the motor, not with the wheels attached etc
Good lord man at least take the wheels off.
In hind sight I agree. Maybe next time :)
Not the way to install the engine.I did it on my own.
Great to hear, but it is nice to work together as a family. Cheers.