82 kz750 cafe racer

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12 Apr 2020 11:16 - 12 Apr 2020 14:26 #823164 by Operatic
82 kz750 cafe racer was created by Operatic
Bought the bike this week non-running with 12k on the clock. Plan is to turn it into a cafe racer/fighter of some sort.

Started out by cleaning the carbs. While they were off I decided to give the engine a thorough cleaning. I think it's fair to say it hasn't been this clean in a while. Going to put it back together today and try for a first start!

Short term plans:
Lower handlebars, either clubmans or flipping the existing superbike bars.
Lower headlight
Led taillight

Long term plans:
4 to 1 exhaust
Modern front suspension/brakes
Paint job

Andrew
'82 KZ750 LTD
Last edit: 12 Apr 2020 14:26 by Operatic.

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12 Apr 2020 13:49 #823172 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer
Well, I got it running! Seemed to run pretty well until I took it off choke. Not sure if I didn't let it warm up enough or what. Didn't take the time to figure out, because it started raining and it was leaking from the fuel filter and one of the float bowl drains... But at least it runs!

Andrew
'82 KZ750 LTD

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12 Apr 2020 13:57 - 12 Apr 2020 14:01 #823173 by Nessism
Replied by Nessism on topic 82 kz750 cafe racer
Please edit your first post and this time click "insert all" on the photos. This will make the photos show up in high resolution instead of thumbnails.

Your carbs look clean from the bowl side but did you remove all the jets before cleaning? It's critical to remove the pilot screws, pilot plug and jet, main jets, and bleed pipe, and clean them separate. Hold up each jet to a strong light and make sure the orifice is open. Also, shoot carb cleaner through the pilot circuit and make sure it comes out the small holes near the butterfly.
Last edit: 12 Apr 2020 14:01 by Nessism.
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12 Apr 2020 14:33 #823183 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer
I did remove the jets during cleaning. There was one that I could not, due to some prior person chewing it up, but I shot a good amount of carb cleaner in there. I might go through it again, but after I buy new airbox hoses to make installation a bit easier.

Andrew
'82 KZ750 LTD

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12 Apr 2020 16:29 #823189 by Skidmark
Replied by Skidmark on topic 82 kz750 cafe racer
I have some good used air box hoses I won't be using...

Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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12 Apr 2020 17:01 #823192 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer
Awesome! PM sent.

Andrew
'82 KZ750 LTD

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12 Apr 2020 18:35 #823196 by Skidmark
Replied by Skidmark on topic 82 kz750 cafe racer
One of the outer ones is a little stiff on one side, but all the rest are pliable.

Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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13 Apr 2020 11:01 #823247 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer

Skidmark wrote: One of the outer ones is a little stiff on one side, but all the rest are pliable.


That could work well. 3 of mine are a little stiff on one side, but one outer is fully pliable

Andrew
'82 KZ750 LTD

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13 Apr 2020 18:34 #823277 by riturbo
Replied by riturbo on topic 82 kz750 cafe racer

Gpz 750 turbo The one I ride
Gpz 750 turbo Not finished
Gpz 750 turbo Not started
Gpz 550 1981
Gpz 550 1983
Bunch of other junk
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13 Apr 2020 18:48 #823279 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer

riturbo wrote: Look here for next cleaning www.kzrider.com/forum/3-carburetor/59856...-cleaner-in-cv-carbs


Thank you! I feel enlightened, indeed! I'm going to do this tomorrow after work!

Andrew
'82 KZ750 LTD

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06 Jun 2020 17:41 #827493 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer
Well I've been making steady progress! Finally got her running decent today. Went back into the carbs, adjusted the floats, and cleaned the idle circuit again. Also found out that my right side muffler was hanging on by a thread, so I switched to the 4-1 header. Now if finally idles nice!

Only issue is that it bogs and dies under wot, must be lean due to the open header. I may go ahead and order some 115 mains. Does that sound right?

Fabbed up a bracket for my new brake light. Installed clip ons. Lowered the front forks an inch or so. New headlight brackets. Painted headlight bucket matte black Removed chain guard and front mud guard.

Lots of little stuff, but it adds up to looking pretty good. At least now I have something to look at and rev up until I go get some gear and my license.

Andrew
'82 KZ750 LTD
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06 Jun 2020 17:46 #827495 by Operatic
Replied by Operatic on topic 82 kz750 cafe racer
Oh yeah forgot to mention I painted the seat! Black Duplicolor vinyl spray paint. Went on super easy and looks great.

Andrew
'82 KZ750 LTD
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