The
MSF course teaches that about 70% of a
motorcycle's braking power is in the front
brake. This is a about actuate figure depending
on the scoot, road conditions and the type of
motorcycle. Apply both brakes at the same time.
Get a
motorcycle with anti-lock (ABS) brakes! -
STOP STOP STOP! ABS is effective in reducing fatal motorcycle
crashes. Study motorcycles with ABS had a fatal crash involvement rate 28 percent lower than that for
their non-ABS versions during the study years.
ABS should not be hard to
find on motorcycles soon. In August 2009, Honda has confirmed that all of its motorcycles will soon have ABS as standard. The other manufacturers will have to follow suit.
Motorcycle ABS vs Non-ABS video
Unlike
racers, you don't have to slow from more than 200 mph to about 40 mph
to make a turn - hopefully. Operating the brakes on most motorcycles
is much more problematical than on four wheel
vehicles. Most motorcycles have separate
controls for the front and rear brakes, with the
front brake usually controlled by a lever on the
right handlebar and the rear brake controlled by
a pedal operated by the right foot.
During braking, a rider must determine how much
force to apply to each control. As with other
types of vehicles, much more deceleration can be
obtained from braking the front wheel than from
braking the rear wheel.
Motorcycles are inherently less stable than
four wheel vehicles and rely on riders’ skills
to remain upright during demanding maneuvers
such as hard braking. Braking too hard and
locking a wheel creates an inherently unstable
situation. Locking the front wheel is
particularly dangerous.
A locked rear wheel is more controllable but
still can lead to loss of control if the rider
simultaneously tries to steer the motorcycle, as
in an emergency avoidance maneuver. Riders concerned about wheel lock
may be reluctant to apply full force to the
brakes, particularly to the front brake,
resulting in inadequate braking. Both Hurt and MAIDS
(Association of European Motorcycle
Manufacturers) had examples of both loss
of control due to wheel lock and failure to
adequately brake.
The MSF course tells you not to cover the
front brake during the first day. The
reason for this is obvious, the speeds on the
first day of the range are slow, and you're new
to riding. If you panic, grabbing the front
brake may send you to the ground. On the other
hand - in the real world, at 62 mph,
covering the front brake cuts 12 feet from your
stopping distance.
"Getting them
into the habit of always covering the front
brake has resulted in measurable reductions in
accidents.”....Harry Hurt
(interview)
So what do you do to stop?
It's simple: Roll off the throttle.
CLUTCH,
BRAKES (both),
DOWNSHIFT |
Studies indicate that there is
practically no difference in pulling the
clutch in first, or braking before the
clutch is applied. Professional riders
during braking tests stopped within a couple
feet using each. Although pulling the clutch
in first on average seems to have a small
advantage. During normal braking (for a stop
sign/traffic light) downshifting, then
braking can be perfectly okay.
Advanced riders EASE off the brakes just
before entering a curve to reduce suspension
bounce, just prior to the turn.
The important things to
remember are:
SQEEEZE the front brake and pressss the
rear. Don't try
to stop a motorcycle until the bike is
straight / the bike isn't leaned or the front
wheel turned. As Harry
Hurt of the famous Hurt study says - "cover the
front brake". Don't use it until the
bike is straight. What does this mean in the real
world? Scenario: You're on the interstate, it's
congested. 12 feet may mean the difference
between checking the cars glove box ahead of
you, or coming to a good clean safe stop.
At 15 mph that's 3 feet added to your braking
distance by not covering the front brake.
For a quick stop, continuously and
progressively squeeze until
stopped or 100% braking power is obtained -
what's that mean? 100% braking power is that
point when traction is at it's greatest and the
wheel is not sliding. 101% a tire is locked.
Why 4 fingers? The MSF doesn't really
elucidate the why's of anything
(don't want to confuse people with facts).
So let's use some good old common sense and see
if we can figure it out.
Federal law (Motor Carrier Vehicle Safety
Standards) requires, "a hand lever force that
does not exceed 245 Newtons (55 pounds)
for any of the first four recovery stops and
that for the fifth recovery stop, is within,
plus 89 Newtons (20 pounds) and minus 44 Newtons
(10 pounds) of the fade test baseline check
average force (S7.6.3), but not less than 0
Newtons (0 pounds)." and "not
less than 10 Newtons (2.3 pounds)".
Ok, there's some wimpy fingers out there. The
other reason? It forces beginners to let off the
throttle (sometimes). If the clutch is in it
really doesn't matter does it? In the real world
- practice with your bike, find out what works
for you.
Highway pegs: If you're in a congested traffic,
city or some place you may need to brake
quickly, don't use your highway pegs -
pretty simple. If you are going to turn take
your feet off the highway pegs. Sensors in
your knees, ankles, feet, will make the turn
feel uncomfortable. In order words, any time
you're not cruising along in the open, use your
regular pegs.
Engine Braking - In the
mountains, going downhill, you use a gear
appropriate to slow the motorcycle. using mechanical energy, using
lower gears/slower engine speed to slow the
bike down. So why do you see those signs telling
you not to use engine braking? It has nothing to
do with safety. Truckers use a method called
Jake Braking, which releases engine compression
and makes loud noises. The state no likely the
loud stuff.
Head and eyes up? Two reasons.
First world war 2 pilots found out about target
fixation. While strafing targets on the ground,
some flew the plane right into their target.
Ouch. Stop as quickly as you safely can but
concentrate on braking, not the object your
braking to avoid. (it also helps keeping the
bike straight. Look for a way out, but don't
lean the bike while braking.
Equilibrium - We want to keep the bike
straight up and down. Your Equilibrium helps.
Leaning can cause you to go down when braking.
Your eyes and inner ear work together on this
one. You don't have instruments like pilots or
bubbles like professional divers to orientate
yourself. You do have the soles of feet on the
pegs or floorboards, pressure sensors in the muscles, tendons and
joints to sense gravity and joint positio and the horizon.-
use them - see
ocular driving.
Anti-lock Brakes aren't designed to help you
stop faster, they prevent the wheels from
locking up so you can maintain steering.
They can also prevent a front wheel lockup. There
are advanced techniques, that riders have been
using for years. For example "Poor man's ABS" by
tapping the brakes repeatedly on wet surfaces. This is an
advanced technique and not for beginners. When Cops
come to an accident scene they can tell if a car or bike had ABS from the skid
marks. They look like this - -
- - - - - - - -. Rider confidence
plays a big part in motorcycle braking, ABS brakes can
stop the motorcycle faster due to this.
Motor cops are taught to apply the front brake
first to get the weight behind the contact patch
quickly (weight shifts forward during braking) and then apply the rear brake. This is an
advanced technique and not suitable for
beginners. Advanced riders also use engine
braking in combination with the brakes. It's not
for beginners. Although weight shifts
progressively to the front as you brake.
2 second rule - Give me a brake. 2
seconds minimum may not be appropriate.
Stay back, use the road, analyze the
conditions. You cannot stop as fast as that car
ahead of you. Safety is up to you - give
yourself space and time. What are you in a hurry
for?
Safe following on the interstate - far
enough back to make the ride enjoyable.
You need to stay back and enjoy the ride. So how
far back? You have to judge traffic and
conditions, are you so far back other cars are
cutting you off getting in between? Think, be
aware, use your judgment! The further back you
are, the safer you are, unless it's causing
problems, the more time you have to stop, the
better for you. Make sure you know what's going
on up the road, not just the first couple cars
ahead of you.
Complex Reaction time: Complex reaction is a reaction involving a decision, such as when deciding
to quickly whether to accelerator or use the brakes.
Reaction time in these situations may be as high as 3 seconds or more.
Non-emergency stops - Because I have to
pay for repairs on my shocks and seals on my
personal bike, when I stop during a normal
situation (progressive braking), I ease off the
brakes to reduce bounce wear and tear. Removing
the extra weight placed on the bike's front
shocks as gently as possible..
Obstacles - Almost always, the best thing to do is avoid going over an
obstacle. The MSF teaches you to approach at a 90 degree angle, raise
your butt off the seat, bend your knees, shift your weight back, and knees against the tank and
accelerate before the front tire goes over the obstacle and roll off after the
front wheel is over.
That's fine for a 2 X 4.
Real obstacles. Let's talk about something bigger (a deer carcass or
dead dog) .Avoid going over, take evasive action, if possible.
If you were paying attention in the first place,
you'd have seen it in plenty of time to smoothly go around.
If it's unavoidable:
- Use maximum braking to try to stop before you hit it
(reduce speed as much as
possible it won't hurt as much when or if
you do go down).
- Do not cover any levers
- Roll-on your throttle starting about .5 seconds before impact
- Do roll off your throttle right after the front tire is
as the front tire surmounts the obstacle
- Stay loose, you can sometimes slide over obstacles,
ride it out .....
- Before you stop to go back to look at what you went over
and catch your breath,
make sure both
tires are on the ground and have full
traction.
Large speed bumps - Can scrape
the underside of the motorcycle's engine. When
possible go between the opening in the middle.
Braking with a passenger - Physics tells us, more weight, more traction
(as long as you don't exceed the manufacturers weight limit). So in theory you
should be able to stop faster. Here's the rub, studies show, that during a quick
braking action, the rider tends to ease off braking when the passenger slams
against them. Don't ease off, that's uncomplicated.
My last words:
Don't ride at your skill level, ride below it! (cute little saying, but
spot on).
In the real world - Cover your front brake lever (if you have a problem
with panicking and grabbing, re-think your decision to ride a motorcycle).
ABS - get a bike with ABS.
Braking isn't always the answer - look for a way out. Watch this guy brake
his way to a 800 foot fall. (video) -
Harley Rider crash on the tail of the dragon -
A little
counter steering and he would
have made it. |