Terrible motor swap idea kz440

  • bound
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Re: Terrible motor swap idea kz440

06 Feb 2026 15:35
#921288
If anyone reads that topic, would you mind giving me your opinion? It's a lot of reading but it also has a lot of valuable information. Do you think I could swap the intake sprocket on my cams to create more clearance at tdc? From what I understood reading that topic, as long as I'm using pistons from an earlier gpz, or in this case a zn550, if I swap the intake sprocket from one of the other kz intake cams onto my zx intake cam, it should create enough clearance...?
1982 KZ1000M2 CSR
1983 KZ440D5 LTD
1985 GPz 550A2?

Craig

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  • Injected
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Re: Terrible motor swap idea kz440

Yesterday 12:19 - Yesterday 12:19
#921308
bound wrote:
If anyone reads that topic, would you mind giving me your opinion? It's a lot of reading but it also has a lot of valuable information. Do you think I could swap the intake sprocket on my cams to create more clearance at tdc? From what I understood reading that topic, as long as I'm using pistons from an earlier gpz, or in this case a zn550, if I swap the intake sprocket from one of the other kz intake cams onto my zx intake cam, it should create enough clearance...?

 
The best aproach to set PTV clearance would be to slot the stock cam sprocket mount holes, then set the cams up using a degree wheel.

You can also set up the cams without a degree wheel using solder and measuring the squish you get to set up max PTV clearance. If I am not using a degree wheel I take compression readings on the #4 cylinder to see how the adjustments are effecting cranking compression.
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 12:19 by Injected. Reason: sp
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Re: Terrible motor swap idea kz440

Today 18:56
#921319
I did it! 

Also I bought the cruzin image pistons and ill make them work and maybe do some testing with them.
1982 KZ1000M2 CSR
1983 KZ440D5 LTD
1985 GPz 550A2?

Craig

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