That depends a lot on your definition of "made for production". The last single made in the US by Harley was the 1922 CD but the very last singles to wear the Harley-Davidson name were the 1978 Aermacchi SS-250 and SST-250 models, made in Italy but with the words "AMF Harley-Davidson" on the tank.
The Ford F-250 Harley Davidson is a special edition of the F-150, 250, and 350. On the F-250, the Harley Davidson package had to do mainly with appearance instead of performance.
The average price for an official Harley Davidson exhaust pipe should lie around 250-450 dollars. More information can be found at the website 'TheHouseofHarley'.
One can purchase a Hayley Davidson for kids from eBay where they have a number of them listed for sale. They are available for prices between $50 and $250.
Probably the Kawasaki ninja series (250) or a Harley Davidson 900 v twin.
There is only one in the back. You could go to an audio shop and get it exteriorized.
Highly recommend a 1200 cc Harley Davidson Sportster 2004-2006 because it is great on gas, though its range is 120 miles a tank, but torque for quik bursts, smoothness ease of total control, sleek look and usually goes 30-40 K miles without much maintainence, less than 500.00.
My V-star 250 will do 80MPH. I weigh 188LBS. Your weight will make a difference.
Ninja 250.
$250-$350
There's no governor on a Honda Nighthawk 250. A Honda 250 Nighthawk is a motorcycle, not a lawnmower.
20w50 motorcycle oil, any brand.