No, not without some modifications. The 2003 model has a larger engine than the 1996 model for one thing.
96 honda 400
what is the valve adjustment procedures for a 1995 honda forman 400
26.9 horsepower
On a 2003 Honda Foreman 400, the drain plug is located on the bottom of the engine, typically on the left side. It is a hex bolt that you can remove to drain the engine oil. Make sure to place a drain pan underneath to catch the oil when you remove the plug. Always check your owner's manual for specific details and recommendations.
The oil capacity of a 1995 Honda Foreman 400 is about 1 quart. The oil weight should be 10w-40. The oil will need to be ATV or Motorcycle oil.
Yes, it does have reverse gear. However, if it does not work then the most likely cause is that the switch for it is broken. It is a considerable job to get it replaced.
.006 for intake and exhaust
Check out my bio page for help changing your Foreman engine oil.
2.9 quarts
book says 2.2 us quarts
Inside the alternator cover on the vehicle's left side.