Kz750e dyno

  • Maxbou92
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Kz750e dyno

31 Jul 2024 16:20
#902698
Hello guys, my bike just left the dyno.. somebody would like to know how many horsepower it gonna have.. so New engine oversize 0.5mm(150psi each one), vm28ss carburetor with pod filter, mild porting, milled head, 4-1 exhaust. 72whp 9500rpm and 43ft torque at the weel 8000rpm(12.3 to12.8 AFR). Don’t know if its good.. my clutch is slipping like hell with Rotella 15w-40 ?!! Dont know if its the clutch or oil?! 
Kz750e 1980

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  • Injected
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Re: Kz750e dyno

31 Jul 2024 17:30
#902703
The claimed factory rating for a 1980 KZ750-E1 with stock parts was 74 HP SAE (at the crank) A rating at the wheel is usually 10-12% lower ( = 66 to 67 HP) They did not mention torque but I would guess around 40 LBFT. You gained a little bit of HP with exhaust and carb swap, seems normal to me.
 
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

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  • Nessism
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Re: Kz750e dyno

31 Jul 2024 17:44
#902706
That sounds excellent to me!  I'm surprised it's that much.  Sounds like a sweet ride!
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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Re: Kz750e dyno

31 Jul 2024 17:51
#902707
Thank you, for my clutch. What are you thinking? Oil or clutch ?
Kz750e 1980

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  • Maxbou92
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Re: Kz750e dyno

31 Jul 2024 17:51
#902708
Kz750e 1980

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  • Nessism
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Re: Kz750e dyno

31 Jul 2024 19:04
#902712
New OEM clutch springs.  The oil is fine.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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  • hardrockminer
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Re: Kz750e dyno

31 Jul 2024 19:39
#902713
I use Rotella in my bikes with no clutch issues.  Just make sure the oil has the JASO certification.
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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  • Maxbou92
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Re: Kz750e dyno

01 Aug 2024 00:19
#902720
I already have nee Barnett clutch springs.. and the diesel oil is rated Jaso . The clutch slip in high gears at 7000 rpm 
Kz750e 1980

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  • Wookie58
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Re: Kz750e dyno

01 Aug 2024 00:33
#902722
This would suggest an adjustment or cable issue (not enough "free-play") if the clearance is too small the clutch will heat up and reduce the clearance further (like resting your foot on the pedal in a car)
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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  • Maxbou92
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Re: Kz750e dyno

01 Aug 2024 00:38
#902723
I tightened the adjuster nut and backward 1/2 turn. I have a big free play on the handle!! New cable too. Soo weird
Kz750e 1980

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  • Nessism
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Re: Kz750e dyno

01 Aug 2024 06:50
#902742
With age and mileage, the fiber plates are known to petrify.  It may be time for a new set.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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Re: Kz750e dyno

01 Aug 2024 07:19
#902745
  All right, I will put my new Kawasaki Fiber plates soon!! 
Kz750e 1980

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