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TOPIC: Starting a rusty '82 KZ750

Starting a rusty '82 KZ750 01 Jul 2019 15:59 #806795

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YOU MEAN THAT'S NOT YOU? :lol:
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Starting a rusty '82 KZ750 02 Jul 2019 11:41 #806856

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SWest wrote: YOU MEAN THAT'S NOT YOU? :lol:


Gadzooks! No. He's my hero
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 06 Jul 2019 22:18 #807101

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Tvag06 wrote: "Just take your time and don't short cut. "

Lol. Didn't think I did shortcut. Thought I was being thorough. :dry: I guess you don't know what you don't know.


Not knowing what you don't know is the first stage of learning something new :) I am going through that now, haha
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Starting a rusty '82 KZ750 09 Jul 2019 23:24 #807293

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I'm in the road. Insured, registered.B)

Trying to get the bike to idle consistently. Seems I'm constantly readjusting the idle knob under the carbs and fiddling with the choke. Wants to idle with different settings after cold start and when at a stop. For instance, after idling after cold start at 1100rpm, I drive for a bit and when I stop she's idling at 1800rpm or more. Any suggestions?


PS Avatar updated per request. :cheer:
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 10 Jul 2019 05:59 #807297

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Have the carbs been synced?
Steve
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Starting a rusty '82 KZ750 10 Jul 2019 07:24 #807310

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SWest wrote: Have the carbs been synced?
Steve


Yes. See post #806761 below for final sync result and footage.
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Last edit: by Tvag06.

Starting a rusty '82 KZ750 10 Jul 2019 12:09 #807326

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Sorry Tvag06 but in your YouTube Video i can´t see any vaccum sync level on your bottle and tube gauge.
The engine sounds like a KZ750 twin @ idle and not really sync correct like 750 four cyl..
Why do you didn´t use the sync clocks and the brass restrictors you had?

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Last edit: by Scirocco.

Starting a rusty '82 KZ750 11 Jul 2019 15:07 #807389

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the guages were still oscillating too much with the brass to be useful for me. The bottles were far easier to monitor the adjustments I was making. They are as close to balanced I could get after about an hour.
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 13 Jul 2019 18:30 #807494

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Made some diy restrictors for my carb sync bottle guages. Haven't tested them yet. Put this bike up for sale. I'll work on it until it sells.

One other thing, I can't figure out why the bike pulls right when I apply the rear brake. Where's my issue? Thanks again guys
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Last edit: by Tvag06.

Starting a rusty '82 KZ750 13 Jul 2019 18:39 #807499

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Could be a bad wheel bearing.
Steve
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Starting a rusty '82 KZ750 14 Jul 2019 11:48 #807535

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Or a loose rear axle
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Starting a rusty '82 KZ750 15 Jul 2019 16:11 #807578

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TexasKZ wrote: Or a loose rear axle


I think the castle nut needs some tightening. Thanks!
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 17 Jul 2019 10:56 #807669

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Tvag06 wrote:

TexasKZ wrote: Or a loose rear axle


I think the castle nut needs some tightening. Thanks!


that did it
'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 17 Jul 2019 11:17 #807673

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Hooray for a cheap and easy fix. Thankfully you found that before it became a catastrophic problem.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Starting a rusty '82 KZ750 17 Jul 2019 11:24 #807674

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Catastrophe is not desired. The nut was tight with a pin in it but not torqued to 100lbs. I've ventured out about 2 miles in town. Want to be sure she's 100% before I have all my trust in her. Ride, inspect... Ride, inspect... Ride, inspect...
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Last edit: by Tvag06.

Starting a rusty '82 KZ750 17 Jul 2019 14:08 #807678

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You may still need wheel bearings.
Steve
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kzrider.com/forum/2-engine/597654-poser?start=240#704229

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Starting a rusty '82 KZ750 17 Jul 2019 16:18 #807683

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SWest wrote: You may still need wheel bearings.
Steve


Thanks Steve. I'll keep an eye on it but I think it was the castle bolt. I just didn't tighten it down enough, not hardly.

Back to my carbs and the idling. I've got my air mixture screws turned out 2 turns and have not yet covered them with a welch cap. Right now I simply placed some of that poster putty over them to keep it sealed. Will adjusting the screws more than 2 turns provide a more rich fuel mix? Can this assist me in maintaining a steady idle at cold start and when warm? At what increments should I turn them out when testing? 1/4 turn? 1/2 turn?

As always thanks for your help.

'80 KZ440D - Stripped for rebuild - kzrider.com/kunena/11-projects/611352-st...ng-a-rusty-80-kz440d
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Starting a rusty '82 KZ750 17 Jul 2019 16:35 #807687

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Basic process is to warm up the engine and then adjust the pilot screws until you achieve the highest idle speed. Should be in the range of 2.5 turns open from lightly seated. If there isn't a whole lot of idle speed change with turning out the screws target 2.5 turns open. And yes, more open is richer.
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Starting a rusty '82 KZ750 17 Jul 2019 16:49 #807689

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Nessism wrote: Basic process is to warm up the engine and then adjust the pilot screws until you achieve the highest idle speed. Should be in the range of 2.5 turns open from lightly seated. If there isn't a whole lot of idle speed change with turning out the screws target 2.5 turns open. And yes, more open is richer.


Great thanks. I'm at 2 turns out currently. When I achieve optimal performance, what do I plug the cavity with? Please don't say metal welch cap. There must be something less perminent right??
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Starting a rusty '82 KZ750 17 Jul 2019 17:33 #807691

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You dont plug them or cover them.
US models came with metal cap over the screws to prevent adjustment - clean air laws ?. UK and Canada did not
1980 kz750E1, Delkevic exhaust
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