Topic: Pulling CB 750 engines.

[754]

I see a lot of people on here lay them on their side.. which is ok when they are apart.

And I have always put them in by leaning my chest on the backbone and lifting with one hand under the dyno and one on the kicker.. have a milk crate or sturdy box beside the frame..

BUT...

 How do you guys think the Honda mechanics in Japan and elsewhere got them in and out for service work.. they sure did not strip the frame and put it on its side!!  Maybe they are eating something we dont have over here?     

[mikedialect]

I see a lot of people on here lay them on their side.. which is ok when they are apart.

And I have always put them in by leaning my chest on the backbone and lifting with one hand under the dyno and one on the kicker.. have a milk crate or sturdy box beside the frame..

BUT...

 How do you guys think the Honda mechanics in Japan and elsewhere got them in and out for service work.. they sure did not strip the frame and put it on its side!!  Maybe they are eating something we dont have over here?     

takes six hands total.

[CB750F2]

Laying the engine on its side and lowering the frame onto the engine is great if the frame is stripped - as it would be if you were installing the motor after a rebuild and a frame restoration - but not so good if the frame has all the bits hanging off it.
I used this method to refit the motor to an empty frame and with the help of a friend we had the frame complete with motor back upright on the centre stand in 10mins max. We supported the frame with a trolly jack while we fitted the forks and the front wheel.
The last time I removed a motor from a fully assembled bike I made up a plate that slid between the bottom rails and the motor. The sump and oil pump need to be removed to do this. The plate extends out the RH side of the bike and is supported by strong adjustable legs. I used a trolly jack and a piece of timber that fitted between the rails to lift the motor and plate to a position where the motor can be slid out the RH side and sat on the plate ready to be lifted onto the bench using a chain block and slings. I was able to do this on my own and without scratching the frame paintwork. I ommitted to say that I lined the bottom of the plate with rubber insertion to prevent damage to the frame. Pat from Oz

[White Nightmare]

When your bike is apart its really easy when you lay the bike down on its side. I did it a couple nights ago by myself.

-Chris

[bbrown]

I made a fixture (c) shaped that fits into top engine mount bolt area then goes forward into cylinder (with cam adjuster removed)  it holds engine at right angle for removal. I've used it on freshly painted frames with great success. As i'm 58,tired,and don't have 6 hands!  Bob

[bryanj]

Back when it was always two people and a tin of black touch up

[azuredesign]

I made a fixture (c) shaped that fits into top engine mount bolt area then goes forward into cylinder (with cam adjuster removed)  it holds engine at right angle for removal. I've used it on freshly painted frames with great success. As i'm 58,tired,and don't have 6 hands!  Bob

Could you show a diagram or photo of this? My wife says whe won't put engines in my bike anymore.

Thanks,
Lost two hands

[Bob Wessner]

My wife says whe won't put engines in my bike anymore.

           

[cafebob]

you can still use the side trick on a dressed bike.  Just take the tank, side covers and seat off.  Put the motor on 2 cinder blocks with a board over them.  lay the bike over the motor.  Two people can do it no sweat.

bob

[seaweb11]

I made a fixture (c) shaped that fits into top engine mount bolt area then goes forward into cylinder (with cam adjuster removed)  it holds engine at right angle for removal. I've used it on freshly painted frames with great success. As i'm 58,tired,and don't have 6 hands!  Bob

Could you show a diagram or photo of this? My wife says whe won't put engines in my bike anymore.

Thanks,
Lost two hands

Come on man, my Mom did mine


Sorry, that was to easy

[ekim98]

Come on man, my Mom did mine

Sorry, that was to easy

Now just admit it seaweb, it's really your mom's bike and she didn't trust you to put the motor in right so she did it herself

[RRRToolSolutions]

I like it when you guys cut your frames and need my kit to repair them for future mods. Then you remove all of the head pieces, cylinders, and make removal of the remaining parts a piece of cake.

I just happen to have a set ready to go .....

Gordon

[azuredesign]

Come on man, my Mom did mine

Jeepers, if she cooks too.... 

[HondaMan]

I usually do it myself, then go to the chiropractor for a week so I can stand up again....

In the "Thoughts..." collection, there's a note about my favorite trick, AFTER you get the engine out and BEFORE you paint the frame: take a grinder or file and flatten the top of the little flange on the right-hand lower engine bolt hole. This little flange can actually lock the engine in a permanently unremovable position during exit, if you get it just wrong.

...yes, I've done that...Gordon, I wish we'd had one of your kits back then...

[spitfire]

When I was younger and more flexible I used to remove and install CB750 engines on my own, nowadays I tend to get help, my 12 years old grandson helped me put the F1 engine in, it was a breeze.

Cheers

Den

[rhinoracer]

I used a manual winch (comealong) hooked to a roof beam and three straps. #1 to the right side, #2 to the left side over the frame and #3 to the left side under the frame top tubes.

Slid it halway out to the right using #1 and #2, unhooked #2, snugged #3 and pulled it all the way out.

[754]

I just call the old Japanese guy down the street!

 I give him a 6 pack, we both have one..

 Then he tells me to go outside the room, 5 min later, he yells its ready!! Then he takes his 3 beer and goes home..

 No scratches either!!

[HondaMan]

I just call the old Japanese guy down the street!

 I give him a 6 pack, we both have one..

 Then he tells me to go outside the room, 5 min later, he yells its ready!! Then he takes his 3 beer and goes home..

 No scratches either!!

Oooo....ninja wrench!