KZ1000 rpm at speed?

  • nickcycle
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KZ1000 rpm at speed?

09 May 2009 15:17
#289428
I have a '79 kz1000. Finally switched back to stock 33 tooth gear in back, down from 35. I'm wondering if anyone could tell me what my RPMs should be at cruising speed on freeway (75 or so mph)? Just seems a bit high yet- right now at about 4500 @ 65/70 mph. Any thoughts?

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  • bountyhunter
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Re: KZ1000 rpm at speed?

09 May 2009 16:22
#289442
Doesn't sound high to me. My 750 twin spins 5000 @ 70mph with stock gears.
1979 KZ-750 Twin

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  • IowaKZ
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Re: KZ1000 rpm at speed?

09 May 2009 16:38
#289463
My G1 1000 cruises about 60-65 mph @ ~ 4k

All stock
1980 G1 Classic
Bettendorf, Iowa

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  • nickcycle
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Re: KZ1000 rpm at speed?

09 May 2009 22:35
#289703
Thanks guys, I guess what I'm really asking is: Can I cruise for extended periods at 80-90mph if that puts me at 6000-6500rpm?

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  • kpier998
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Re: KZ1000 rpm at speed?

09 May 2009 23:55
#289730
Yes, assuming the engine is in good shape, that shouldn't be a problem. Years ago, I read that an engine is usually built to run continuously at it's peak torque rpm without placing undue stress on the internals. How close to peak torque would 6500 rpm fall?

According to this site, it will probably be near peak torque:
www.bikez.com/motorcycles/kawasaki_kz_1000_ltd_1979.php

If yours is not an LTD, then it might be slightly different.

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  • larrycavan
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Re: KZ1000 rpm at speed?

10 May 2009 06:19 - 10 May 2009 06:21
#289760
79 LTD 1000 @4500 RPM engine speed

With 33/15 gearing and 79" Circumferance rear tire:
5th = 72.4 MPH
4th = 64.0 MPH
3rd = 52.9 MPH
2nd = 40.3 MPH
1st = 27.9 MPH

5th gear @8500 RPM = 136.8 MPH
5th gear @6214 RPM = 100.0 MPH


With 35 /15, same tire

5th = 68.3 MPH
4th = 60.4 MPH
3rd = 49.9 MPH
2nd = 38.0 MPH
1st = 26.3 MPH

5th gear @8500 RPM = 129 MPH
5th gear @6591 RPM = 100 MPH
Last edit: 10 May 2009 06:21 by larrycavan.

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  • nickcycle
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Re: KZ1000 rpm at speed?

13 May 2009 08:25
#290783
Thanks everyone. I realized that the prev. owner of my bike had also put a 14T sprocket in front instead of the stock 15T. I'm changing that out today, will see how it goes. Hopefully that will put me somewhere around 5500- 6000RPM at around 85mph. Should be okay for cruisin the freeway?

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  • Bicycle Lee
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Re: KZ1000 rpm at speed?

13 May 2009 10:48
#290812
what about 41 rear and 15 front?
Is there a table of this info somewhere on the web?
1978 KZ1000 police

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Re: KZ1000 rpm at speed?

16 May 2009 13:53
#291695
Anybody??
1978 KZ1000 police

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  • Royal1MC
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Re: KZ1000 rpm at speed?

16 May 2009 14:43
#291706
Bicycle Lee wrote:
what about 41 rear and 15 front?
Is there a table of this info somewhere on the web?


Try this link, just fill in info on you bike, and put any custom gearing you want to use.

www.gearingcommander.com/
*1980 Z1-R (current))
*1978 KZ1000 LTD w/ Z1-R frnt end (sold)
*1977 KZ650 B1 (sold)

Los Angeles, CA

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  • timebomb33
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Re: KZ1000 rpm at speed?

16 May 2009 15:55
#291729
14 41 gearing is what i use on my little drag bike it is good for around 125 mph top speed but if you run that gearing on the street it will be very buzzy and not super comfortable to ride i prefer 15 33 or 35 on the street my self.
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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  • larrycavan
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Re: KZ1000 rpm at speed?

16 May 2009 18:45
#291762
timebomb33 wrote:
14 41 gearing is what i use on my little drag bike it is good for around 125 mph top speed but if you run that gearing on the street it will be very buzzy and not super comfortable to ride i prefer 15 33 or 35 on the street my self.

Me too.

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