Roads covered with gravel should be traveled on SLOWLY, sometimes even below 10 MPH.  Going faster than 15-20 MPH is just asking for an accident.  If you accidentally or unknowingly get onto gravel at higher speeds, DO NOT TURN, BRAKE, OR ACCELERATE!  It is much like hydroplaning!  If this happens, let up completely, but gradually, on the throttle.  Even doing this does NOT guarantee that you won't "wipe out".
 
 

    Leaves on the road can act much like ICE, particularly when they're wet.  Reduce your speed before getting onto a section of the road that is covered with leaves.  Ideally, it is best to get down to 15 MPH.  This is particularly true when turning (and leaning).
 
 

    Many faulty cars and such have a habit of leaving trails of oil on the road, particularly in the center of your lane!  It is best to avoid driving in this, for it can cause you to lose control and have a serious wreck.  Ideally, it is best to go to the right of this oil track.  Also, this is more of a problem, particularly during the first half-hour after it starts raining.
 
 

    Driving a motorcycle in snow and/or ice is best avoided altogether.  If you ABSOLUTELY MUST drive that motorcycle in snow, you should stay close to the right side of the road and take it very slow, such as 10-15 MPH.  Moreover, you may wish to have your feet skimming on the ground.  WARNING:  Be EXTREMELY careful that your ankles and feet don't get caught between the ground and the foot pegs (when on a motorcycle)!!!  You may even wish to call a cab to take you home and find a way to pick up your motorcycle or scooter when conditions are much safer.  This last thing applies when it is fine when you go somewhere, but then the roads get snow covered before you have a chance to get back home.  Also be warned that road defects and such may be disguised.
 
 

    Speed should be reduced during windy conditions.  Please remember that the faster you go, the more that your motorcycle or scooter will want to "fly".  When this happens, you have short periods where your traction is compromised.  If a blast of wind occurs doing one of these periods, it could throw you off balance and cause your bike to slip from underneath you!  At slower speeds, your bike is less apt to want to "leave the ground", and thus you are likely to have traction all the time.
 
 

    Often times, there may be gravel on the road where none is normally found, particularly after a thunderstorm or heavy rain.  This is due to gravel getting washed down an alley and often onto a main road.  In this case, you should reduce your speed and pay more attention, particularly when turning.