Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions
In this tutorial, see how to replace the transmission oil in a Harley-Davidson Fat Boy, a very simple and quick operation. First, wait for the engine to cool down sufficiently, then unscrew the bolt containing the dipstick located on the upper area of the engine. Next, position a container underneath it, locate the drain bolt for the transmission, which should not be confused with the engine oil bolt, and unscrew it using a T40 Torx key. At this point, allow all the oil in the system to drain out, reassemble everything, and insert the new oil through the designated hole.

Updated on 22 August 2026 by ScegliAuto

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