X1CRT SPEED RUN Over 100Km/h

[wpjwpj]

ESC is QUARK 125B, i am use A123 6s2P.

Thank you.

[relex27]

That mamb monster ESC kit is so great!

[copra001]

This engine sound is so quite, it sounds like jst engines, what did you do for that?

[MRCScotty]

They are using an electric motor. Most likely brushless with LIPO batt power.