Reasonable Dyno results?

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.

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..

yep...90 at the RW sounds good.

90 is a realistic number with those mods. Stock would have been about 65.

funny ...just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true.........

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

You can change the HP#s just by changing your rear sprocket. As OMR said, it is the torque #s that tell the story.

If you put a stock Harley 1200 on a dyno, t will read about 45hp but the torque will be off the chart.

trianglelaguna wrote:

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...

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)

otakar wrote:

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...

otakar wrote:

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