650 and 550 engines

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13 Dec 2010 19:22 #416840 by silverado
650 and 550 engines was created by silverado
Does anyone know if a 1980 kz 650 engine will fit in a 1982 kz550 ltd frame? Any help is appreciated.
1980 kz 650 f
2 1981 kz550 ltd's
1 19?? kz750

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13 Dec 2010 19:39 #416843 by loudhvx
Replied by loudhvx on topic 650 and 550 engines
It will not bolt in. The 650 is slightly larger. You can probably do some cutting and welding to get it to fit, though.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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  • testarossa
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  • Attack life, it's only trying to kill you.
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13 Dec 2010 19:59 #416845 by testarossa
Replied by testarossa on topic 650 and 550 engines
I thought that stock for stock the 550 was a quicker bike due to the 6 speed.
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN

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13 Dec 2010 20:31 #416849 by gane
Replied by gane on topic 650 and 550 engines
Teserosa, You are correct sir. At least w/ the KZ550A, (not sure about the LTD) Recieved my "schooling" in the day, while playing w/ a GS1000, KZ 650,CB750/836 on Ortega Highway. admited, the 550 had a Moriwaki head & Kerker exhaust & was piloted by a talented lightweight, but the fact is/was, the 550 set the pace & could go away at will. G
[img][/img] 1977 KZ1000A1

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14 Dec 2010 11:05 #416908 by loudhvx
Replied by loudhvx on topic 650 and 550 engines
Plus, you can bolt in a gpz 550 motor as long as you mount an oil cooler.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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  • hocbj23
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14 Dec 2010 11:48 #416917 by hocbj23
Replied by hocbj23 on topic 650 and 550 engines
gane wrote:

Teserosa, You are correct sir. At least w/ the KZ550A, (not sure about the LTD) Recieved my "schooling" in the day, while playing w/ a GS1000, KZ 650,CB750/836 on Ortega Highway. admited, the 550 had a Moriwaki head & Kerker exhaust & was piloted by a talented lightweight, but the fact is/was, the 550 set the pace & could go away at will. G

I am surprised that the GS1000 didnt suck all the rest up its airbox.Those were/are some quick,good handling bikes.bj

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14 Dec 2010 12:11 #416919 by apbling
Replied by apbling on topic 650 and 550 engines
I haven't ridden my 550 LTD in a while... (hopefully spring) but I can attest that it can handle its own with my 750 LTD no problem. I sure do miss it.

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14 Dec 2010 19:48 #416989 by silverado
Replied by silverado on topic 650 and 550 engines
My dilema. I had, have a kz650f together and running, bought it with a 550 nltd in a box. Also have a 550ltd rolling chasis, really nice bike but no motor. The kz 650 nis a bit too tall for me the 550 is perfect. Wanted to put the 650 nin the 550 nchasis. Maybe I should just put the 550 box togehter? Want something to ride in the spring.
1980 kz 650 f
2 1981 kz550 ltd's
1 19?? kz750

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16 Dec 2010 20:40 #417340 by silverado
Replied by silverado on topic 650 and 550 engines
Hey I measured the 650 frame and the 550 frame today. NOT Doable without quite abit of cutting and welding. Guess I live with what I have. Thanks for the input folks. I'm sure i'll have more stupid questions in the future.
1980 kz 650 f
2 1981 kz550 ltd's
1 19?? kz750

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19 Dec 2010 16:58 #417798 by silverado
Replied by silverado on topic 650 and 550 engines
Solved my problem. I just bought a mint 550ltd rolling chasis. Must have been stored indoors for the last 30 years. It needs a motor and I have one. Thanks for all the help and advise.
1980 kz 650 f
2 1981 kz550 ltd's
1 19?? kz750

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20 Dec 2010 09:14 #417868 by loudhvx
Replied by loudhvx on topic 650 and 550 engines
Nice score. Looks like it had your name on it all along :)
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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