engine swap/ 80 kz750 engine in a 78 kz650 frame

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21 Apr 2012 15:21 #517146 by ad936
engine swap/ 80 kz750 engine in a 78 kz650 frame was created by ad936
I have a 78 kz650 and need a new engine. I found a 1980 750 but I don't know if it will fit. The 750 does not come with carbs. Does anyone know if the 750 will fit in my frame? also will i be able to use the carbs off the 650?


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21 Apr 2012 16:22 #517160 by steell
Replied by steell on topic engine swap/ 80 kz750 engine in a 78 kz650 frame
As long as it's a four cylinder then the answer is yes and yes.
KD9JUR
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21 Apr 2012 17:16 - 21 Apr 2012 17:17 #517173 by ultimate fighter
Replied by ultimate fighter on topic engine swap/ 80 kz750 engine in a 78 kz650 frame
this is my 77 kz650 with a 1286cc big bore yamaha.
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so i guess what i'm trying to say is... Yes it will fit.

More than likely the only difference will be electrical BUT don't hold me to it
love building motorcycles one headache at a time
Last edit: 21 Apr 2012 17:17 by ultimate fighter.
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22 Apr 2012 01:35 #517227 by ad936
Replied by ad936 on topic engine swap/ 80 kz750 engine in a 78 kz650 frame
Awesome, thanks for the help.

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22 Apr 2012 12:06 - 22 Apr 2012 12:07 #517293 by zukdave
Replied by zukdave on topic engine swap/ 80 kz750 engine in a 78 kz650 frame
The VM 24's off the 650 will bolt right on
then add lot's of jet.
I just took mine off my gpz 750 motor.
They "WILL NOT" let the motor breath for shit.
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.
Last edit: 22 Apr 2012 12:07 by zukdave.

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