Reasonable Dyno results?
- Mkosharkii
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Reasonable Dyno results?
25 Mar 2010 23:34
Just got back from a 6 month deployment on a submarine and finally have some time on my hands.
Right before I deployed, I had the bike dynoed at a local shop. I'll get around to posting the scans, but the peak horsepower was 90 on the dot. My bike is a 79 1000 LTD with the following mods: 10.25/1 1075cc, Mikuni VM29's w/ pods, APE .410 cams and springs, and a Kerker 4-1 w/ baffle. From your guys experience, does 90hp at the wheel seem right?
Thanks in advance for the advice.
Right before I deployed, I had the bike dynoed at a local shop. I'll get around to posting the scans, but the peak horsepower was 90 on the dot. My bike is a 79 1000 LTD with the following mods: 10.25/1 1075cc, Mikuni VM29's w/ pods, APE .410 cams and springs, and a Kerker 4-1 w/ baffle. From your guys experience, does 90hp at the wheel seem right?
Thanks in advance for the advice.
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- will61310
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Re: Reasonable Dyno results?
25 Mar 2010 23:58
I had an 1166 GPZ 1100 with headwork and 36 mm flatslides and a kerker that only did 110,so that sound about right to me..
...1980 LTD 1000...
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- Mcdroid
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Re: Reasonable Dyno results?
26 Mar 2010 02:14
yep...90 at the RW sounds good.
Michael
Victoria, Texas
1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A
Victoria, Texas
1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A
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- larrycavan
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Re: Reasonable Dyno results?
26 Mar 2010 03:58
90 is a realistic number with those mods. Stock would have been about 65.
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- trianglelaguna
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Re: Reasonable Dyno results?
26 Mar 2010 04:48
funny ...just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true.........
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
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- Old Man Rock
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Re: Reasonable Dyno results?
26 Mar 2010 05:28
Low to mid 90's yup, sounds about right....
"just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true"...
Rear wheel or crankshaft numbers...
Larry and I spoke of this many moons ago pre-engine build and expected numbers... As in the example of the front of our service manuals gives torque and HP graphs.... The numbers for a stock 900 or ~ 80ish.... Those are Crankshaft numbers, not rear wheel....
Out of curiosity, what torque numbers came out of your Dyno run?
OMR
"just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true"...
Rear wheel or crankshaft numbers...

Larry and I spoke of this many moons ago pre-engine build and expected numbers... As in the example of the front of our service manuals gives torque and HP graphs.... The numbers for a stock 900 or ~ 80ish.... Those are Crankshaft numbers, not rear wheel....
Out of curiosity, what torque numbers came out of your Dyno run?
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- otakar
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Re: Reasonable Dyno results?
26 Mar 2010 06:24
You can change the HP#s just by changing your rear sprocket. As OMR said, it is the torque #s that tell the story.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- otakar
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Re: Reasonable Dyno results?
26 Mar 2010 06:26
If you put a stock Harley 1200 on a dyno, t will read about 45hp but the torque will be off the chart.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- Jack
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Re: Reasonable Dyno results?
26 Mar 2010 06:49
trianglelaguna wrote:
They left out MEASURED AT THE CRANK. RWHP will be less every time...
funny ...just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true.........
They left out MEASURED AT THE CRANK. RWHP will be less every time...
79 KZ 1075 MKll
79 KZ 1500 MKll dragbike
Gone but not forgotten:
3 X 73 Z1's
1 X 74 Z1A
1 X 75 Z1B
79 KZ 1500 MKll dragbike
Gone but not forgotten:
3 X 73 Z1's
1 X 74 Z1A
1 X 75 Z1B
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- otakar
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Re: Reasonable Dyno results?
26 Mar 2010 07:04 - 26 Mar 2010 08:17
My 1150 "J" motor with .420 intake and .410 exhaust heavily ported 84 GPZ head is geared for top end I am putting a 40/18 (2.28:1) final drive ratio on it. A properly geared 750 would be able to jump away from it in a hole shot. But once we start to get any speed I will have the advantage all the way. Standard rear ratios for Kawasaki was 39/15 (2.6:1) for cruisers and 41/15 (2.73:1) for hi-performance bikes. some drag racers use 46/14 (3.29:1)
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Last edit: 26 Mar 2010 08:17 by otakar.
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- larrycavan
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Re: Reasonable Dyno results?
26 Mar 2010 16:52
otakar wrote:
900 / 1000 KZ's were 35/15 while LTD's were 33/15.
39/15 gearing on a KZ 1000 is for wheelies... :laugh:
Your gearing is for traveling very fast with a built motor like that. I keep wishing I had a 6 speed trans in my bike...
My 1150 "J" motor with .420 intake and .410 exhaust heavily ported 84 GPZ head is geared for top end I am putting a 40/18 (2.28:1) final drive ratio on it. A properly geared 750 would be able to jump away from it in a hole shot. But once we start to get any speed I will have the advantage all the way. Standard rear ratios for Kawasaki was 39/15 (2.6:1) for cruisers and 41/15 (2.73:1) for hi-performance bikes. some drag racers use 46/14 (3.29:1)
900 / 1000 KZ's were 35/15 while LTD's were 33/15.
39/15 gearing on a KZ 1000 is for wheelies... :laugh:
Your gearing is for traveling very fast with a built motor like that. I keep wishing I had a 6 speed trans in my bike...

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- turboguzzi
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Re: Reasonable Dyno results?
26 Mar 2010 17:15
otakar wrote:
have to disagree, hp is purely a function of the work the engine performs in a given time, its unrelated to gearing.
In any case, 90 sounds good to me too.
TG
You can change the HP#s just by changing your rear sprocket. As OMR said, it is the torque #s that tell the story.
have to disagree, hp is purely a function of the work the engine performs in a given time, its unrelated to gearing.
In any case, 90 sounds good to me too.
TG
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