KZ750H Restoration

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20 Apr 2020 15:50 #823763 by mopguy
Replied by mopguy on topic KZ750H Restoration
If you haven't painted the tank yet, you might want to consider purchasing a paintless dent removal kit on e-bay, sooner or later it will come in handy.

I have a 1980 Kawasaki KZ750 Ltd. I bought new. I recently managed to get it out of my garage after 28 years and put it on the road again (2010). I feel like a kid all over again. Since I have acquired 3 78 KZ1000 Ltd, 1 1981 KZ1000 Ltd, and another 1980 KZ750 Ltd. Love the LTD's.
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20 Apr 2020 17:13 #823769 by calum
Replied by calum on topic KZ750H Restoration
I did consider pulling the dent but the old bog was pretty hard so I just filled it back up instead of cleaning it out. I also wasn't too sure about the creases around the edges of the dent, I didn't want any cracks to develop when pulling it. Probably would have been fine but I didn't want to risk it.

Basically I'm taking the easy way out on this one: instead of pulling the dent or filling with tin I'm just using what I have lying around and hoping to get a couple of years out of it :)

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20 Apr 2020 20:26 #823782 by Mikaw
Replied by Mikaw on topic KZ750H Restoration
Great job on the coil mounting. I looking into those mini coils. Just more for the look. What did you install over the plug wire as an exterior sheath.

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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20 Apr 2020 20:35 #823784 by Skidmark
Replied by Skidmark on topic KZ750H Restoration
I can only hope my engine turns out looking that nice. Doubtful the turd polishing will go that well!

Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)

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21 Apr 2020 12:10 - 21 Apr 2020 12:11 #823843 by calum
Replied by calum on topic KZ750H Restoration

Mikaw wrote: What did you install over the plug wire as an exterior sheath.

The boots came with the coils and the sheath over the wire was pulled from the original wires before they went in the bin.


Skidmark wrote: I can only hope my engine turns out looking that nice.

Looking at the photo from earlier today, the head already looks better than mine did. That crankcase should clean up fine as well :)
Last edit: 21 Apr 2020 12:11 by calum.

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23 Apr 2020 10:43 #824062 by calum
Replied by calum on topic KZ750H Restoration

Nessism wrote: The head bolts that install down inside the cam chain tunnel area ARE stretch bolts. I bought brand new ones for my 750 and they would not reach the minimum torque as listed in the service manual before serious yielding occurred so I stopped short to avoid breaking them.


Going back to this. When I put the head back on the last time I cleaned all the oil off the threads and torqued two new bolts up incrementally (22.5Nm, 25Nm, 27.5Nm, 30Nm). Each increment required about 30°. The front one tightened up without yielding but the back one went through about 90° when gong from 27.5 to 30Nm (a pretty stressful 90°). I was curious so I backed it off and retightened incrementally. The second time it tightened up normally so it had definitely yielded and it wasn't the threads giving in :)
Technically I should have replaced the back bolt as they are single use. I'm pretty sure it will hold until the head is back off next winter. Interesting that both times I have put new bolts in only the back one has yielded.

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30 Apr 2020 08:35 #824626 by calum
Replied by calum on topic KZ750H Restoration
Last piece of the puzzle done today: painted the tank and side covers. The room I have been using wasn't available so I rented a room for a couple of hours.



The results are a lot better than I could have got in the other room. The lighting alone made a huge difference, not to mention the ventilation and heating system. You can see that I didn't quite get the lines right with the bog on the right hand side of the tank (look at the reflections), but it's good enough considering what it looked like after sandblasting.











Everything is safe back in the garage now (stressful drive home). Will leave it for a couple of days before I put the cap, petcock, etc. on.

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30 Apr 2020 08:50 #824628 by Skidmark
Replied by Skidmark on topic KZ750H Restoration
I'm impressed! I have never tried painting with the exception of rattle cans. Great job!

Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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30 Apr 2020 12:10 #824648 by calum
Replied by calum on topic KZ750H Restoration
Thanks. To be honest, using a spray gun is so much more forgiving than a rattle can. I really struggle spraying with a can but using the gun I have only had two runs on all of the parts for this bike. I hadn't done much painting before this project - just the brake callipers and an engine cover on the hornet.
I find painting a lot easier to deal with than polishing - that may have something to do with patience though :)
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30 Apr 2020 16:44 #824670 by Nessism
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01 May 2020 12:29 - 01 May 2020 12:30 #824714 by calum
Replied by calum on topic KZ750H Restoration
Couldn't resist today - I very carefully put the badges on the side covers and tank. They're back off the tank (as is the cap) until I put it on the bike, but the side covers are staying on.
Paint is pretty close to fully hardened and should be fine on Sunday - supposed to be fuel proof after 5 days so should be pretty good after 3. I'll be putting the tank on the bike on Sunday as it will be a year to the day since I pulled up on the bike. I won't put any fuel in the tank til later in the week, though. Not taking any chances



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Last edit: 01 May 2020 12:30 by calum.

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03 May 2020 08:32 - 03 May 2020 09:04 #824849 by calum
Replied by calum on topic KZ750H Restoration
A year to the day since I bought the bike home. Need to wait a few more days before putting fuel in the tank, but all the resto work is done.









Last edit: 03 May 2020 09:04 by calum.
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