Saving a 1980 750 twin.

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27 Jul 2017 06:06 #767805 by 80B4
Replied by 80B4 on topic Saving a 1980 750 twin.
Nice work on that top mount Vic!

1980B4 1000
1978 Z1R
1978 B3 750
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  • DoctoRot
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29 Jul 2017 15:57 #767945 by DoctoRot
Replied by DoctoRot on topic Saving a 1980 750 twin.
I got the ignition system installed and I was dying to hear this thing run, so I hot wired it. This motor has great compression and is very difficult to turn over with the kick-starter even with my 230lbs behind it, but it still started up first kick!

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  • SWest
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29 Jul 2017 16:13 #767948 by SWest
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31 Jul 2017 07:16 #768024 by 531blackbanshee
Replied by 531blackbanshee on topic Saving a 1980 750 twin.
sounds damn good.

leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
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08 Jan 2018 13:50 - 08 Jan 2018 14:07 #777075 by DoctoRot
Replied by DoctoRot on topic Saving a 1980 750 twin.
I decided to scrap the custom foot-pegs I was working on and modify the stock brackets to use Tarozzi pegs, I also turned some aluminum spacers so they are solid mounted now. all that remains is wiring, fuel plumbing, and a license plate holder. gettin close!

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Last edit: 08 Jan 2018 14:07 by DoctoRot.

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08 Jan 2018 17:33 #777087 by SWest

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09 Jan 2018 02:02 #777095 by DoctoRot
Replied by DoctoRot on topic Saving a 1980 750 twin.
forgot to some add these pics of the new shifter. I went a little overboard on the speed holes with the stock shifter so I re-made it out of thin wall steel tube, and TIG brazed the fittings on. It threads into an aluminum Tarozzi splined clamp.

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19 Mar 2018 13:13 - 19 Mar 2018 13:22 #780459 by DoctoRot
Replied by DoctoRot on topic Saving a 1980 750 twin.
I'd like to get some opinions here as I have compromised the strength of a semi-structural screw and I don't want my own "genius" to kill me. I drilled and tapped this head-stock screw to mount an oil light. The difference between the OD minor thread diameter and the ID major thread diameter is about 4mm so I am left with 2mm thick walls. This screw appears to pretty lightly loaded as the steering stem fits into the top triple and is firmly clamped with a pinch bolt. I torqued the modified screw to the factory value of 36ft/lbs and it seems fine. I have also seen aluminum aftermarket replacement screws available for this application so I can't imagine that this is super critical strength wise. thoughts?
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19 Mar 2018 15:37 - 19 Mar 2018 15:41 #780469 by Wozza
Replied by Wozza on topic Saving a 1980 750 twin.
My thought is the bolt is used to make sure the the top clamp is fully pulled down onto the stem before being locked into place by the pinch bolt,

I cant see how it would cause any catastrophic failure

1982 KZ550H1
Last edit: 19 Mar 2018 15:41 by Wozza.

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  • Scirocco
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19 Mar 2018 18:20 #780482 by Scirocco
Replied by Scirocco on topic Saving a 1980 750 twin.
A M16 screw can torque up to 240 Nm at 8.8 grade fine pitch.
You are on the save side.

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21 Mar 2018 01:15 #780550 by DoctoRot
Replied by DoctoRot on topic Saving a 1980 750 twin.
blasted and painted with Gun Kote. i tested it and it is really bright.
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21 Mar 2018 10:15 #780565 by TexasKZ
Replied by TexasKZ on topic Saving a 1980 750 twin.
Too cool.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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