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I owned a 2000 and 2001 shadow 750. I read one bike magazine dyno said 38 hp. Specs say 44. I know I could barely hit 70 on mine. Are the newer ones different. The engine wasnt changed as far as I can tell. Is that 44 at the crank. That would be about 38 at rear wheel. I weigh 200. Didnt know if it has enough power to stay at 70 mph
 

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Yeah you’re talking about two totally different engine configurations, look @ the difference in rated horsepower/torque vs RPM’s measured @ crank: 750 Shadow single crank pin design- 44 hp @ 5500 rpm & 46 lbs ft lbs of torque @ 3300 rpm.
Rebel 500 dual crank pin design- 46 hp @ 8500 rpm & 31.7 ft lbs of torque @ 7000 rpm. (I’m not going into detail on other engine differences)
my 03 750 ACE which was the same configuration as your 750 shadow can run 75 to 80 (actual) mph all day long & iv’e been 100 (actual) mph pushing a Memphis fats windshield along with loaded saddlebags. Edit: I weigh in @ 168 lbs Remember “Torque moves mass”
 

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1999 Shadow 750 ACE VT750CD3 Modified
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The horse power numbers look right.
I've seen 36 claimed at the rear wheel by the EPA and 45 claimed at the crank.

Your performance numbers look wrong, like it was lacking about 12 of those horsepower.

A factory stock 750 ACE will make 80 mph pretty easily and eventually work its way to 100 mph.
I've done it before I started messing with mine an I weigh about the same as you.

It is definitely no rocket sled, but contemporary magazine tests gave it a 0 to 60 time of under 7 secs and a 1/4 mile of 15 sec flat @ 84 mph.
 

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I recall seeing a dyno test for factory stock Aero, that was more like 35 hp at the rear wheel, while tests of the chain drive variants were some 4 hp higher, which is what one should expect. Shaft drive is something like 10% less efficient, than chain drive, according to the textbooks.

Still, most guys report that they can reach ~ 85 mph on their shaft drive 750s. Something isn't right.

It can be challenging to find dyno test results of stock motorcycles. Motorcycle magazines and the online equivalent seems to be the best source. But any test of one machine is a small data sample. Very hard to say where that one data point lies on the bell curve.
 

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Based on the stock gear ratios every VT750 should have a top speed above 90mph and some models 100mph so your bike had something wrong. My 1997 VT750 easily did 80 mph in the 1/4 mile, however I did not like the vibration and found the best mileage and comfort at about 55.
 

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2008 Honda Shadow Aero 750
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I owned a 2000 and 2001 shadow 750. I read one bike magazine dyno said 38 hp. Specs say 44. I know I could barely hit 70 on mine. Are the newer ones different. The engine wasnt changed as far as I can tell. Is that 44 at the crank. That would be about 38 at rear wheel. I weigh 200. Didnt know if it has enough power to stay at 70 mph

[/QUOTI have no issues going 80 and 85 if I have to catch up. I usually run 65 to 70 no issues
2008 aero 750 E]
 

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My 00 and 01 model brand new at the time would not stay at 70 unless i twisted the throttle wide open and held it. Totally gutless performance. I would like to ride one thats normal
There's a chance you had bad diaphragms in the carbs. they will be down on power and the mileage will suffer. A failing fuel cut relay can also cause performance issues, It may gravity feed enough to run around town but will struggle on the highway, as will a failed/failing fuel pump. An overly large windshield will reduce the top speed also.

Edit: If they did it when new, maybe it was normal? They are a serious drop from a sportbike's power.
 
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