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Saving a '81 KZ750-E

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Saving a '81 KZ750-E 20 Nov 2019 16:30 #814263

  • Skidmark
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I finally started looking at the carburetors today. With some WD40 I was able to get the choke and throttle shafts moving again. Decided to get the vacuum pistons out and see how the diaphragms are looking. All the pistons were frozen in place. After liberal quantities of WD40, I was able to get 3 of the 4 out. Both outers were more difficult, with one of them being the last remaining. I hope I am up to the task of saving these!

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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker
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Saving a '81 KZ750-E 20 Nov 2019 16:33 #814264

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The diaphragms are still pretty pliable and crack free. The corrosion will be the big deal in getting these working or not.
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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker

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Saving a '81 KZ750-E 20 Nov 2019 17:02 #814265

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Heat on the body will soften the varnish holding the slide.
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Saving a '81 KZ750-E 20 Nov 2019 17:09 #814267

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Have you encountered any problems reusing the choke shaft (if it's corrosion free)? Other than the mushroomed screws you mentioned in another thread?
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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker

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Saving a '81 KZ750-E 20 Nov 2019 17:14 #814269

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I reused everything other than the O-rings. The choke setup is fiddly, but it's not too hard to deal with once you figure it out. Study the spring arrangement and take a few photos for reference just in case.

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Saving a '81 KZ750-E 20 Nov 2019 17:15 #814270

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Nessism wrote: Heat on the body will soften the varnish holding the slide.


Nice bit of advise. It worked!
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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker

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Saving a '81 KZ750-E 23 Nov 2019 14:33 #814416

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That wasn't too terribly complicated.

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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker
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Saving a '81 KZ750-E 23 Nov 2019 20:19 #814427

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If anyone wonders what happens to gasoline after sitting for 28 years, here is your answer! Getting the float bowl screws out has been the most difficult part so far. 16 possible points, final score - Skidmark =14, float bowl screws =2. At least one broke above the sealing surface, so I won't have to drill it out. The other broke flush. Bummer. This was after soaking with penetrating oil.

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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker
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Saving a '81 KZ750-E 23 Nov 2019 20:22 #814428

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I've seen worse. Those will be okay.

If you need float needles get Keyster brand. They are the only ones with a spring strong enough to hold up the float like the OEM parts.

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Saving a '81 KZ750-E 23 Nov 2019 20:29 #814429

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I have purchased a Dyno Jet kit for these. Going with stage 3. K&N pod filters with a Delkevic 4 into 1 exhaust. I also picked up the stock Keyster rebuild kits with most of the o-rings, float valve needles, etc.
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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker

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Saving a '81 KZ750-E 23 Nov 2019 20:39 #814430

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Any issue with soaking these floats in carburetor cleaner for prolonged periods of time?
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'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker

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Saving a '81 KZ750-E 23 Nov 2019 22:50 #814435

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Never had any issue with the floats in carb dip. This carbs (CB 650) are looking like yours before and are clean as new now.


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