diyracer
nounUK /ˌdiːaɪˈreɪsə/
US /ˌdiːaɪˈreɪsər/
A diyracer is a person who makes their own racing things, like small cars or boats.
My cousin is a diyracer who built a little car from old parts.
OTHER MEANINGS
2. A homemade racing vehicle put together by hand.
He raced his diyracer down the hill.
3. A video game character or avatar built by the player for racing games.
She customized her diyracer with bright colors.
4. A person who organizes informal, self-made racing events.
The diyracer set up a weekend race for the neighborhood.