Remove the Motorcycle Carburetor transmission drain plug and drain out the transmission fluid.
Make sure that you clean up the magnetic plug before you reinstall it, replace the O-ring and then pour in the proper amount of transmission fluid.
Remember when you are checking the fluid level in the transmission to keep the bike sitting up straight.
One of the more important things that needs your attention is the battery.
If the battery is older than 2 years, and you have not had it hooked up to some sort of battery maintainer, don't even screw around just replace it!
You can bet when you least expect it (especially in the heat of summer) that bugger will let you down.
While you are doing all of this service work, it doesn't hurt to throw in a set of new spark plugs.
Check the gap and adjust them as necessary, put a little anti-seize on the threads and DO NOT over torque them.
Take a look at the plug wires and clean up the boots real good or replace them if they're starting to look heavily worn.
Let's move onto the fuel lines and the carburetor, because the fuel goes bad in the carburetor much more quickly than the fuel in the tank because of its smaller volume.
So you will need to get some of the gas mixture from your fuel tank into your carburetor. Start by running your vehicle for about ten Carburetor Seat minutes.