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Author Topic: saving a 1980 KZ750 twin  (Read 52792 times)

Offline 1fasgsxr

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Re: saving a 1980 KZ750 twin
« Reply #370 on: Jul 30, 2017, 22:08:19 »
Sound great
http://www.dotheton.com/forum/index.php?topic=41083.0

I eat cake because it's some ones birthday somewhere...

Offline doc_rot

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Re: saving a 1980 KZ750 twin
« Reply #371 on: Jan 08, 2018, 18:04:56 »
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!
« Last Edit: Jan 08, 2018, 18:07:14 by doc_rot »

Offline canyoncarver

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Re: saving a 1980 KZ750 twin
« Reply #372 on: Jan 08, 2018, 23:12:05 »
Glad to see you back on this one too.
--
KZ400 The Rabbit
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
65 Norton, My damn Shovelhead chop
more YZF750R's, the KZ's, a Zephyr750...and the unfinished 75' CB550 cafe.
--

Offline doc_rot

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Re: saving a 1980 KZ750 twin
« Reply #373 on: Jan 09, 2018, 05:52:02 »
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 made a new one out of thin wall steel tube, and TIG brazed the fittings on. It threads into an aluminum Tarozzi splined clamp.
« Last Edit: Jan 09, 2018, 06:31:11 by doc_rot »

Offline doc_rot

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Re: saving a 1980 KZ750 twin
« Reply #374 on: Mar 19, 2018, 17:10:12 »
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?
« Last Edit: Mar 19, 2018, 17:22:22 by doc_rot »

Offline teazer

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Re: saving a 1980 KZ750 twin
« Reply #375 on: Mar 19, 2018, 18:25:54 »
I replaced the steel top nut on a set of forks with an aluminum bolt from a late model TZ250.  It does not need to be very strong as there is not a lot of force on that nut/bolt. Bottom triple clamp does most of the work.

Offline jpmobius

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Re: saving a 1980 KZ750 twin
« Reply #376 on: Mar 19, 2018, 19:18:50 »
The bolt will be fine.  You could ride around with the bolt left out entirely with no real cause for concern as long as the three pinch bolts are properly in place.  Cool spot for the light - how are you routing the wire?
Mobius


On a long enough timeline, the survival rate for everyone drops to zero.

1973 RD350 Yamaha build  http://www.dotheton.com/forum/index.php?topic=66498.0


Offline doc_rot

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Re: saving a 1980 KZ750 twin
« Reply #378 on: Mar 19, 2018, 21:00:20 »
Thanks for the input fellas. I'm going to paint it black this afternoon.

The bolt will be fine.  You could ride around with the bolt left out entirely with no real cause for concern as long as the three pinch bolts are properly in place.  Cool spot for the light - how are you routing the wire?

that was the conclusion I came to as well. The wire will go out the bottom of the steering neck then up and back into the loom.

Offline doc_rot

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Re: saving a 1980 KZ750 twin
« Reply #379 on: Mar 21, 2018, 05:13:49 »
blasted and painted with Gun Kote. i tested it and it is really bright.