KZ650 Performance Question - Where's my power?

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11 Nov 2008 10:17 #246822 by 77_650B1
Replied by 77_650B1 on topic KZ650 Performance Question - Where's my power?
I've got that too, I think my Dyna just needs to be adjusted a bit, she'll run rougher down low, but I need more advance up top though. We'll see what happens with the huge cylinders.
1977 KZ650-B1
-Dual Discs
-Dyna-S
-WG Coil Mod
-Alloy Wheels

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12 Nov 2008 02:45 #246979 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
So, my problem could be ignition related as well? I'm still using stock ignition and will get a Dyna this winter.

Wondering if it's ignition or carb related?

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12 Nov 2008 20:22 #247136 by rstnick
Replied by rstnick on topic KZ650 Performance Question - Where's my power?
I noticed a flat spot as well, after switching rides with zixxerboy and his kz650.
I switched over to a Kawi electronic ignition last Winter, and it doesn't have the flat spot anymore.
When running points, I hadn't maintained them much over a few years so it doesn't surprise me that she wasn't running to her full potential.
Rob
CANADA

Need a key for your Kawasaki? PM me

1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R
2005 z750s

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13 Nov 2008 03:11 #247165 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
Thanks Rick. Hopefully that is my issue as well. I'll hold off messing with the carbs until I get the Dyna in this winter and see how it goes.

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13 Nov 2008 21:50 #247306 by timebomb33
Replied by timebomb33 on topic KZ650 Performance Question - Where's my power?
herrdeacon it sounds to me your a bit lean on the needle id raise it up one clip and see if that changed it it probable wont be ignition related because it goes to full advance at a much lower rpm then this problem is showing up at. it should't take more than an hour to change the clip position so give it a try. if it makes it worse go the other way but the way you have described the problem it makes me think its lean.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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14 Nov 2008 02:52 #247331 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
Thanks timebomb, I'll give that a try.

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14 Nov 2008 16:53 #247424 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
So, out of curiosity. What is the difference between changing the clip position and changing the size of the main jet. Meaning, what is the effect of each, and how do you know when to do either?

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14 Nov 2008 17:02 #247425 by timebomb33
Replied by timebomb33 on topic KZ650 Performance Question - Where's my power?
when you raise the needle it allows it to come out of the main jet sooner,and allow fuel to come out quicker. the needle has its biggest effect on the midrange
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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15 Nov 2008 02:28 #247508 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
Thanks for the explanation timebomb.

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05 May 2009 14:55 #288197 by HerrDeacon
Replied by HerrDeacon on topic KZ650 Performance Question - Where's my power?
Thought I should update this thread to let you know the dead spot now seems to be gone. Over the winter I cleaned the head, valves, adjusted shims, and installed Dyna-S, Dyna coils and wires. Only had a chance to test it a couple of times, but it now pulls hard right through the 5000-7000 range.

Thanks for everyones help.

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06 May 2009 05:56 #288422 by Bluemeanie
Replied by Bluemeanie on topic KZ650 Performance Question - Where's my power?
Next ride, go ahead and run her up to redline. The power really starts to come on at about 7000. Your just tickling with the power band. Run her up and report back! :)
1980 KZ650F1, Bought new out the door for $2,162.98!

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06 May 2009 08:34 #288469 by Tyler
Replied by Tyler on topic KZ650 Performance Question - Where's my power?
Absolutly you need to give it some "stick" I am convinced that these motors were designed to operate in two speeds, off and wide open.;)

By today's standards these are not fast bikes, but they certianly aren't slow either. You have to remember these engines where technological marvels when they came out 30 years ago, let her spin! that's what hey were designed to do. :woohoo: :woohoo: :woohoo:
If I knew what I was doing all the time life wouldn't be any fun.

'80 KZ650 E 700cc, dyna ignition and coils, frame up restoration, daily driver
'81 KZ1300 A3 full restoration, custom big bore pistons, 1400cc 6 cylinder super bike
"77 KZ650 B1 - Barn Find, work in progeress
"74 Yamaha DT 400 Enduro

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