GS750D project started

[Tonythetiger]

Morning All, I've started the strip down on my GS750D 1977 and before I got to far into it I did a compression test with the results shown in the pictures attached, I'm thinking that the compression is a little low and was wondering if I should consider stripping the engine and putting new pistons/rings etc in. I'm taking the engine out next weekend and sending the frame off to be blasted and powder coated black along with the swing arm and various other items, the tank and panels are going for paint later next year when I will be starting to put her back together. what's your thoughts?
I've put the GSX1400 in my brothers garage out of the way as it could get damaged while I'm working on the GS and we wouldn't want that now eh.                                                     T.T.T

[seth]

If you want to replace/upgrade get a rehire and some good gs850 pistons with new rings .

[Tonythetiger]

I'm having a problem getting the bearings out of the neck if anyone has a good plan as I'm starting to damage the neck with my dremel. I've been going at it for a couple of hours now, I had it in my head these would just be tapped out with a drift in 5 mins but NO chance of that as it doesn't have any part of the race sticking out to tap at.

[seth]

Laser tools do a adjustable bearing removal tool it has a slight ridge then you tighten it into the edge of the bearing will get them out in 2 mins .
I'll try to get a picture of mine to help you Halfords sell them I think .

[Tonythetiger]

I think I know what you mean but there is nothing to grip on to, I have bearing pullers but nothing will grip them.

[KiwiCol]

Now you've cut right through, can you not deform it inwards using a small cold chisel in the gap between the bearing seat & the neck?  If not, cut a second section out, I see you've started another cut, take out the small piece then the larger remaining piece of bearing seat should come out easily.

[Tonythetiger]

I'm only home 1 day a week so my time in the garage is limited (i'm a trucker), I'll give it another couple of hours next Saturday when I get back home. Even the dremel is having a hard time cutting it and I can't go to hard in case I damage the neck. The bottom ring is in pretty good shape so I might just leave that one in and just replace the bearings once the frame is powder coated. have a good week.
                                                                       T.T.T

[grog]

TTT, mate who works in bike shop says, either cut thru as you attempting. His main way is weld suitable bracket to it, then attaches slide hammer to bracket. Few whacks and job done.

[SFC1000]

Run a weld all the way around the bearing. it will shrink and all but fall out. We did this on dozer final drives. Bigger, but same principal.
Don't ever go hitting a bearing with a chisel or any hard metal object.
If you get a bearing splinter in you, you will know about it. They travel deep into your body and not to mention your eyes.

[grog]

SFC, i forgot the weld trick, i knew that one. Mate once got big splinter in knee, hitting hammer with hammer.

[Tonythetiger]

I will order a welder while I'm away.
I've just ordered extra cutting discs for the dremel and I could do with a better welder anyhow so I will update you all in next weeks episode of "knuckle dragger v bearing race"  haha....
T.T.T

[seth]

Laser 6257 Motorcycle Steering Stem Bearing Race Remover https://www.amazon.co.uk/dp/B0183SV2YI/ref=cm_sw_r_cp_apan_glt_fabc_VHX56H8B12ZC1Y040RGY

This is what I use brilliant on the gsx and I've used it on a gs 1000 too .

[SFC1000]

Trouble is Tony's is a blind bearing outer you can't get behind.

[Eric GSX1400K3]

If you can line up the ridge on the laser tool with the line where the outer rac


meets the head stem tube, and wind out the spreader, it should move the race enough to get behind. Then tap out from the top.

I like the welding tip, I'd be trying that first.

On the 1400 there's just enough of a lip showing to get at it from the top and vice versa from underneath, but it doesn't  seem to be the case here.

[Tonythetiger]

I rang a mate of mine who is a steel fabrication guy "and previous owner" to see what he thought, an hour later they are out. Heat plus hammer plus chisle equals job done. They had been packed with grease causing them to stick to the head stem which didn't help any but the heat sorted that issue out. T.T.T