my pug was "hospitalised" on 9/9/2015 for "friction wheel" problem and will be road ready, maybe by next week. the noise coming from the engine sounded like the a loud motorbike's "pooo-pooo"

what is friction wheel? i also don't know. just saw some pics on google = https://www.google.com/search?q=friction+wh...Y1phgdSld9fk%3D