650/750 engine in Z1 frame?

  • Sixten
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650/750 engine in Z1 frame?

Yesterday 08:32
#920574
Hi,

I found a Rickman frame Z1 without engine for sale and i have bunch of Z650/750 engines…

Would it fit with adapters? I don’t want to cut the frame.

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  • MFP-Joe
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Re: 650/750 engine in Z1 frame?

Yesterday 08:39 - Yesterday 09:02
#920575
The "engine conversion specialists" here can certainly tell you that... If I were you, I would get a Z1000 A1 or A2 engine for the Rickman frame (they aren't as expensive as the 900cc Z1 engines, and they fit just like a 900cc engine; the dimensions are exactly the same).........Unless you enjoy challenges and are looking for the fun of remodeling...
 
Greetings, Joe
Last edit: Yesterday 09:02 by MFP-Joe.

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  • sf4t7
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Re: 650/750 engine in Z1 frame?

Yesterday 08:56
#920577
I'm with Joe.  Why not drop in a 1000 - it fits perfectly and you'll have some extra power.  More if you hotrod the 1000 with a little more compression!
Scotty

1974 Z1A
Yoshimura 987, 10.25:1
welded Z1 crank
Andrews 1X Cams
Delkevic 4 into 1
Superbike bars
530 conversion

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  • Injected
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Re: 650/750 engine in Z1 frame?

Yesterday 09:35 - Yesterday 09:42
#920580
I did the exact opposite and put a Z1 engine in a 650 frame without major alterations so I would say yes its probably going to work.

www.kzrider.com/forum/11-projects/618809...00-engine-transplant

If you read thru my build thread all the frame mock up is explained in detail. 

The 650/750 engine is not as tall so there would be extra room at the top of the cam cover. Its much easier to do the mock up with empty cases/head/barrels, that is what I did. For mine I just sat the cases as low as possible then started looking at the motor mount points.
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
Last edit: Yesterday 09:42 by Injected. Reason: more info

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  • Wookie58
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Re: 650/750 engine in Z1 frame?

Yesterday 10:06
#920581
Try and keep as straight a line as possible from the rear axle, through the swingarm pivot to the gearbox sprocket
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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  • Sixten
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Re: 650/750 engine in Z1 frame?

Yesterday 12:20
#920586
Yes a 1000 would make sense but to race it it needs to be a Z1 or 650/750 engine.

Can the 650/750 engine be longer because of the extra shaft between the crank and gearbox?
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  • TexasKZ
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Re: 650/750 engine in Z1 frame?

Yesterday 13:31
#920589
What extra shaft?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: 650/750 engine in Z1 frame?

Yesterday 15:38
#920593
The secondary shaft between the crank and gearbox. Chain driven from the crank and drives the clutch basket.
On Z1 engines the clutch basket drives directly on the crank.

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Re: 650/750 engine in Z1 frame?

Yesterday 15:57
#920594
Injected wrote:
I did the exact opposite and put a Z1 engine in a 650 frame without major alterations so I would say yes its probably going to work.

www.kzrider.com/forum/11-projects/618809...00-engine-transplant

If you read thru my build thread all the frame mock up is explained in detail. 

The 650/750 engine is not as tall so there would be extra room at the top of the cam cover. It’s much easier to do the mock up with empty cases/head/barrels, that is what I did. For mine I just sat the cases as low as possible then started looking at the motor mount points.

Thanks. And nice build. 
Looks like the length is similar but like you say I would have more space upwards and could probably rotate the engine to fit.

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