81 kz750 engine I think ?

  • 750killacycle
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31 Dec 2018 05:24 #795953 by 750killacycle
81 kz750 engine I think ? was created by 750killacycle
Hello, I'm new here trying to find some info on an ATV I picked up engine I believe is a 81 kz750 looks to have the mikuni 29mm smoothbores on it just looking for some help identifying some of these pieces to see what I got here it has nitrous on it as well so thinking motor was built for it, hopefully
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31 Dec 2018 06:51 #795962 by martin_csr
Replied by martin_csr on topic 81 kz750 engine I think ?
CycleChaos.com has the engine & frame number info for many Kawasaki models.



....

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31 Dec 2018 08:36 #795968 by 750killacycle
Replied by 750killacycle on topic 81 kz750 engine I think ?
I'm pretty sure it's an 81 kz750 per engine number I'm trying to figure out about mixing parts how to identify which head it has if the carbs are infact 29mm smooth bores etc

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31 Dec 2018 08:43 #795969 by les holt
The following user(s) said Thank You: 750killacycle

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31 Dec 2018 09:24 #795971 by 750killacycle
Replied by 750killacycle on topic 81 kz750 engine I think ?
That's awesome from what I've been reading there a really good carb for this bike I'm gonna be tearing down the top end here soon anything I should look for or is there any heads better then the other I read that the gpz head was better how do I tell what's on there?

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31 Dec 2018 18:02 #795993 by gordone
Replied by gordone on topic 81 kz750 engine I think ?
For personal intrest, what is the tubing on the inlet, measure vaacum?

Make a project thread?

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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31 Dec 2018 19:40 - 31 Dec 2018 19:41 #795998 by Patton
Replied by Patton on topic 81 kz750 engine I think ?

750killacycle wrote: I'm pretty sure it's an 81 kz750 per engine number....

1981 KZ750 Engine No. Range per Zedder:
KZ750EE024601 - 062600

Good Fortune! :)

1973 Z1
KZ900 LTD
Last edit: 31 Dec 2018 19:41 by Patton.

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01 Jan 2019 11:37 - 01 Jan 2019 11:37 #796015 by 750killacycle
Replied by 750killacycle on topic 81 kz750 engine I think ?
The tubing is the plumbing for the nitrous, also can anyone identify these pistons? And I'm still new to foru.s in general should I just start a topic about my project?
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Last edit: 01 Jan 2019 11:37 by 750killacycle. Reason: Add image

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01 Jan 2019 12:33 #796022 by les holt
Replied by les holt on topic 81 kz750 engine I think ?
Look up inside them from the bottom, there is usually a tell tale mark or symbol that'll give you the answer, I would say they are higher compression than stock. Take a look at the ends of the cams and see if they're aftermarkets, again, usually some kind of marks.

Les Holt

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01 Jan 2019 13:48 #796023 by 750killacycle
Replied by 750killacycle on topic 81 kz750 engine I think ?
There's an mtc cast in bottom I'll look closer when I get home, thank you for info

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02 Jan 2019 06:33 - 02 Jan 2019 06:39 #796054 by KZB2 650
Replied by KZB2 650 on topic 81 kz750 engine I think ?
I can see why its called the kilacycle........ 750 motor on a 4 wheeler with high comp MTC pistons and nitrous is crazy ..... but in a good way.;)

I can still remember buying the Hot bike magazine with the article on the nitrous kit they put on a 900 Kaw in the early 80s..... dreamed and planned on doing it but was mainly scared of damaging the motor (and myself) and also was always low on funds too.

1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
Last edit: 02 Jan 2019 06:39 by KZB2 650.

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02 Jan 2019 06:52 #796055 by 750killacycle
Replied by 750killacycle on topic 81 kz750 engine I think ?
Haha yeah I like this thing I picked it up dirt cheap it was an animal but was smoking I'm trying to freshen up top end finding it difficult to track down rings these pistons are +2mm I emailed mtc I'm hoping they can help find rings for them

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