gt750 engine removal

markj · Post by **markj** » Sun Jul 18, 2010 12:03 pm

I've got my buffalow striped down to the wheels forks and motor. I'm getting ready to take the motor out so I can strip and paint the frame, swinger, etc..

I have a shop crane but I'm wondering what's easier - to use the crane or to lay the frame down and unbolt the engine as I've seen others on this site do it? This is the first time I've pulled the motor on a buffalo but I'm betting it's a lot heavier than the h2 motors I've pulled.

two-stroke-brit · Post by **two-stroke-brit** » Sun Jul 18, 2010 1:00 pm

hi i lifted the motor out without a hoist and nearly hurt myself doing it ,they weigh about 160lbs so i am told and it ceryenly felt all of that.
i used a hoist to put it back which was cumbersome but painless.
i think in the case of a complete strip to the frame it would be easier to do as others have done and lay it over and lift the frame off the motor.
and reverse when reinstalling.
mark

tz375 · Post by **tz375** » Sun Jul 18, 2010 4:50 pm

I always take thw top end off first and the things are still ridiculously heavy to get in or out. I'd suggest the lay it on its side trick

markj · Post by **markj** » Sun Jul 18, 2010 5:37 pm

Thanks guys. I was leaning that way. I can always use the crane to move it to the bench where it'll stay until I get the frame and suspension done. Then I have to figure out how deep into the motor I want to go.

Mark

Post by **Suzsmokeyallan** » Sun Jul 18, 2010 8:20 pm

Richard in your post you talk of the top end off, do you mean just the head or the cylinder and head.

tz375 · Post by **tz375** » Mon Jul 19, 2010 7:56 am

The head weighs so little, there's not much point. Pull the barrels off to make it a lot lighter - and the alternator too.

Post by **Suzsmokeyallan** » Mon Jul 19, 2010 9:25 am

Ok just wondering if you were removing the head for better clearance but then the 8mm stud will be sticking up so thats no benefit, so you are right, a complete head and cylinder is in order.
As an addition if you remove the left points side assy and cover from the main cases and the clutch parts from that side as well as alternator parts you will significantly narrow the engines bulk and lighten the mass before it comes out. Plus its easier to do this with the engine secured in the frame cradle anyways.

markj · Post by **markj** » Mon Jul 19, 2010 12:44 pm

I "might" just for ya ha's put the bike on the side stand and try the crane that way. That might allow a sraight lift out of the bike with a little movement of the motor to clear the frame. We'll see.....if that doesn't work easily then I'll put it on it's side.

tz375 · Post by **tz375** » Mon Jul 19, 2010 4:11 pm

Allan,

Don't remove the engine side covers. gearbox oil will spill everywhere - even if you think it has been drained - ask me how I know

Mark,
There has to be a way to get a complete motor into the frame. The factory did thousands of them that way but I have not seen a photo of the jig they used, so I have no idea what it looks like.

It's probably a pair of L shaped straps to spread the load.

Sure would be nice to see how they did it.

markj · Post by **markj** » Mon Jul 19, 2010 6:19 pm

I hear you Richard - it would be nice to know. I'll have a crack at it tomorrow or Wed when I'm off work. I'd like to use the hoist since I already have it. If I come up with something easy I'll be sure to share.

I ordered a newtronics ignition today. I know I'm a long way off from needing it but I just wanted to have it around for when the time comes. If I tear the motor down and have to start over with the ignition I figure this will make life easier. It's been a quite a while since I've fiddled with points on a bike.

two-stroke-brit · Post by **two-stroke-brit** » Mon Jul 19, 2010 6:33 pm

hi mark,this how i did it and i was able to get it half in then move the straps but when it came time to get the bolts back in i had to jiggle it with a buddy to align one hole ata time.

hope this helps.
mark

markj · Post by **markj** » Mon Jul 19, 2010 6:39 pm

Thanks Mark! I didn't think of using pipes through the mount holes. Hopefully my motor will like that nice when it goes back in.

two-stroke-brit · Post by **two-stroke-brit** » Mon Jul 19, 2010 6:43 pm

hi mark the main trouble i had was trying not to cut the mounting bushes from there respective washers ,i think it realy is a two man job as my wife will atest to after me cursing her out for "not watching" as i cut the first ones off.
patience is required.
good luck mark

Post by **oldjapanesebikes** » Tue Jul 20, 2010 1:14 pm

As TZ mentioned, laying the bike over and then lifting the frame off it does work really well if you are working by yourself. I used the same method for installing the engine back into the frame last time as well, and it was a no muss/no fuss process. If you have a strong friend, then just lifting it out as described in the shop manual is not that bad, but can still be a struggle.

Post by **Suzsmokeyallan** » Tue Jul 20, 2010 3:16 pm

Nah Richard, I'm not worried about the oil, I drain it out as much as possible and then dump a bunch of sawdust under the spot and "let er rip" its no big deal, I just clean it up afterwards.
It also helps if you have a little "oil area" to do this in.

gt750 engine removal

gt750 engine removal

getting it out

hoist

mounting bushes