Suma, BIS OFP developer, answered:
Here is config file for our bicycle:
class Kolo: Motorcycle
{
access = ReadOnly;
vehicleClass="Car";
canFloat = false;
isBicycle = true;
hideWeaponsDriver = false;
displayName=$STR_DN_KOLO_KOLO;
scope=public;
picture="\Kolo\ikolo";
icon="\O\Vehl\moto.paa";
maxSpeed=20;
crew = Civilian5;
side = TCivilian;
nameSound="car";
accuracy=0.50;
model=\Kolo\Kolo;
terrainCoef=6.0;
soundEngine[]={"\Kolo\bc_chain.wav",db-35,1};
weapons[]={BikeHorn};
magazines[]={};
driverAction = ManActKoloDriver;
transportSoldier = 0;
transportAmmo = 0;
};
The part that cause animation to be stopped when not moving is:
isBicycle = true;
Hope this will help.