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crankshaft zx550 (GPZ550) 06 Aug 2021 13:02 #853267

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friends i have trouble!  bought an engine but it is defective.  broken two teeth on the crankshaft.  a question, tell me, the crankshaft from KZ 750 is suitable for the KZ550 engine (ZX550-GPZ550)
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crankshaft zx550 (GPZ550) 06 Aug 2021 15:17 #853281

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Welcome to KZRider
Sorry for your bad luck
 Im not a 650 guy / expert , but I think it will fit 
 Im sure others with first hand knowledge will chime in 
Dave

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn
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crankshaft zx550 (GPZ550) 06 Aug 2021 15:55 #853287

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Nope.

GPZ 550 bore/stroke = 58 x 52,4 mm
GPZ 750 bore/stroke = 66 x 54 mm
KZ 650 bore/stroke = 52 x 54 mm

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crankshaft zx550 (GPZ550) 06 Aug 2021 23:23 #853316

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Thank you, the patient is just convinced. then another question will come from zephur (zr550) ???

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crankshaft zx550 (GPZ550) 07 Aug 2021 06:40 #853331

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I am just wondering out loud (in electronic print) if the 750 crank and rods could be used with 550 block, pistons and head, for a 58 X 54mm combo?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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crankshaft zx550 (GPZ550) 07 Aug 2021 06:58 #853334

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650's and 750 share a lot of engine parts, but not with the 550.  The smaller engine is quite different.

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crankshaft zx550 (GPZ550) 07 Aug 2021 07:01 #853335

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Thank you, the patient is just convinced. then another question will come from zephur (zr550) ???
Looks like the same part number for Zephyr and GPz.

www.partzilla.com/product/kawasaki/13031...ae66e4cfe67886ff8b95
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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crankshaft zx550 (GPZ550) 07 Aug 2021 10:50 #853350

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Cylinder spacing is closer on the 550 than 750/650. That should make for a challenging fitment project.

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Last edit: by loudhvx.

crankshaft zx550 (GPZ550) 07 Aug 2021 18:49 #853387

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Cylinder spacing is closer on the 550 than 750/650. That should make for a challenging fitment project.
What’s a little rod curve between friends?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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crankshaft zx550 (GPZ550) 08 Aug 2021 20:35 #853427

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Thank you very much!  I will search from him, it is easier to find him.  after I write about the results (instagram  #wiats)

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Last edit: by Fairing_d87.

crankshaft zx550 (GPZ550) 08 Aug 2021 21:42 #853428

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or you could just have the gear repaired
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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crankshaft zx550 (GPZ550) 11 Aug 2021 03:57 #853557

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I thought about it too.  but where can I find such a good uncle in the video))) I'm considering this option if I don't find a crankshaft

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