Rule number 1. Never buy a used nitro engine unless you know the person and how they maintain their equipment. This will save you the biggest headache. If you buy new, you know what you did to the engine.

Air filters: We change them every race day. Getting any dirt in an engine is not good for it. This not only prevents that but also keeps the tune consistent. If you leave it on there and let dirt build, it will affect the tune.

Clutch bearings: If you like changing them every day buy the cheap ones. If you don't buy the tko special clutch bearings.

Clutch shoes and springs: We change them every 2 race weekends. If you are running shoes for gallons of fuel, then you are giving up time coming out of the corners on waiting for your shoes to engage. Yes, it does add up and affects traction of the car.

Glow plugs: Our temps vary from spring to summer and fall. Spring and fall we will run a hotter plug and summer we go to a colder one due to higher humidity and temps. This allow us to not touch the carb needles so much.