20-50 wt multi-viscosity, and between three and four quarts.
20/50 weight. That is all that is recommended.
carburated
It tells you right on the tires.
31" from top of yube to axle
97 softtail takes 3 quarts of oil in oil bag 11/2 in primary.
yes
always premium gas
buy a module and install it inline in your wiring harness
It's a Harley Davidson, Heritage Softtail Classic, with High Ape handle bars.
The oil capacity of a 1990 Harley-Davidson Heritage Softail is approximately 3 quarts (about 2.8 liters) when using a standard oil filter. If you include the oil filter change, the total capacity can be around 3.5 quarts. It's always best to consult the owner's manual for the most accurate information specific to your motorcycle.
If you have not already done so, google it. Their are many on the net, free for the taking.
The 2003 Harley-Davidson Heritage Softtail transmission drain plug is on the bottom of the transmission. The drain plug is flush with the bottom of the transmission. You can remove it with a half inch ratchet.