munson15

Just bought my son his first bike. A used 2005 TTR 125. This is my first dirt bike in 35 years and I could use some advice on maintenance. Specifically, tightening and lubing the chain, cleaning and oiling the filter, chaning the oil (whick bolt is the drain?) and changing the spark plug. After I get that done, I want to focus on the drum brakes (front and rear). What do I look for there? Also, what octane of gas does it require? Source for a good manual? Any other advice would be greatly appreciated.