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KZ650 engine block interchangeable btwn years? 30 Nov 2015 08:07 #701213

  • aenikolopov
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Nessism wrote: Hard to tell but I agree with Steve, looks like bolt on parts: sprocket cover, transmission cover, and crescent shaped metal chain guard. All replaceable parts.

Oh, and your sprocket is worn out. Add a new chain and sprocket set to the shopping list.

Edit: may also need a clutch pushrod, and of course new seals for the transmission cover. Speaking of that, I've got some spare seals if you find yourself in need. Have to check but should have a full set. PM me if you want to discuss.


I realize you have something of a conflict of interest here, but I'll ask anyway: Do I really need new seals? I have no reason to doubt the old transmission cover's seals, though pulling them might damage them? The replacement cover I've purchased (used, on ebay) also comes with all the seals.

On that topic: Is a new mission cover gasket necessary in these situations? What's the rule with gaskets - get a new one every time you crack the part open? (carbs, crankcase, transmission cover, etc)

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Last edit: by aenikolopov.

KZ650 engine block interchangeable btwn years? 30 Nov 2015 09:08 #701232

  • Nessism
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The seals and gasket are something like 35 years old. If you want to gamble that's your choice. It's not like you are talking about a bunch of money or anything though.

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Last edit: by Nessism.

KZ650 engine block interchangeable btwn years? 30 Nov 2015 09:10 #701233

  • SWest
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It's best to replace them. If they aren't broken I use copper high temp silicon. It can still weep sometimes. If the seals are still pliable, they should be good. I wouldn't try to reuse the old ones. If Ness will give them to at a good price, I'd go for it. One less thing to worry about.
Steve

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KZ650 engine block interchangeable btwn years? 30 Nov 2015 15:21 #701273

  • zukdave
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Use a new gasket its part of the clearance settings to make it work
right and there cheap.
Seals no way in hell you gonna remove and reuse one much less a
35 year old one with out it leaking.
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.

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KZ650 engine block interchangeable btwn years? 03 Dec 2015 11:04 #701740

  • loudhvx
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Does the ball come out on the push-rod side on a 650? It can't on the 550... only rolls out toward the clutch side. The ball is bigger than the rod.

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KZ650 engine block interchangeable btwn years? 03 Dec 2015 11:25 #701741

  • SWest
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Same on the Z1.
Steve

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KZ650 engine block interchangeable btwn years? 03 Dec 2015 15:25 #701773

  • zukdave
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I've read that it will on the 650's but never had my old motor apart just thought I'd mention it just in case.
My GPz motors a pull type clutch and doesn't have a push rod.
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.

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KZ650 engine block interchangeable btwn years? 13 Jan 2016 09:50 #706582

  • aenikolopov
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Hi all. Just wanted to give a word of thanks to all here that helped. I replaced the broken covers, and that was about it. Had some damage to the clutch release mechanism, but the sprocket cover I had picked up off ebay had the spare parts attached. Along with a new set of oil seals care of Nessism, the bike is back to running.

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KZ650 engine block interchangeable btwn years? 13 Jan 2016 10:27 #706589

  • rrsmsw9999
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Dang it, i didn't see this thread. I have a usable shift mech cover and gasket.
1980 KZ 1000E2
Crashed 6/2016

1980 KZ550A
Sold 3/2016

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