It depends. If the manual says it will work, then yes. Otherwise, API Service SM has friction modifiers that are not compatible with motorcycle's wet clutches.
unbolt it
NO
NGK 5531 gap .036
should be 2002 - 2004
it needs 10w-40
About 110 miles per hour, from my experience.
3.7 Gal tank 0.9 gal reserve
The starter motor is on the front side of the engine underneath/behind the intake manifold.
The 2004 Honda Civic has 115 horsepower at 6100 rpm. The engine boasts 4 inline cylinders with a single overhead cam.
under the motor by right front tire
The Dynojet website give a typical 2004 Honda Aero a rating of 36.7 hp. Hope this helps. NigelNicholson@comcast.net
Under the left engine case. Buy a Honda service manual, that will help.