You could just have one event for all your vehicles, just triggering a vehicle model.
addEvent ( "spawnVehicle", true )
addEventHandler ( "spawnVehicle", root,
function ( model )
local x,y,z = getElementPosition ( source )
local vehicle = createVehicle ( tonumber ( model ), x, y, z )
if ( vehicle ) then
warpPedIntoVehicle ( source, vehicle )
end
end
)
For the bike:
triggerServerEvent ( "spawnVehicle", localPlayer, 509 )
For the BMX:
triggerServerEvent ( "spawnVehicle", localPlayer, 481 )