type of gas should I use? For best performance,
use high octane gas from a local gas station. 91 - 93 octane
premium unleaded fuel is recommended. You may also use 87
octane gas as well. Do not use any type of diesel fuel.
This vehicle has a powerful 4-stroke
Engine, so NO mixing of gas
and oil. Just add pure gasoline into the gas tank. There
is a separate oil pan with dipstick located on the front of
the engine. Like an automobile, please periodically
check the oil level. SAE 10w40 is used when it comes
time for an oil change (approximately every 1000 miles or
do I properly start the bike with the Pull Starter? Below is the proper
procedure to start your pocket bike via the Pull Start:
[ If this is the 1st time you are starting the vehicle,
locate the small clear bulb pump under the carburetor and
squeeze the bubble until it fills up with gasoline. This
will assist in starting for the 1st time. Go
to Step 1 ]
1. Stand the bike upright; you should be
straddling the bike. The pull start cord is on your right
side. 2. Put the choke lever in the open position
( the white lever in the UP position ).*
3. Pull the start cord out slowly
until it reaches its maximum length and then let it retract
slowly. Repeat this procedure 2 times.** 4. On the 3rd attempt, pull the cord out
swiftly with one strong pull.***
( pull the cord straight back; do
not pull at an angle, as pulling it at an angle may damage
the cord ). 5.Repeat steps
3 and 4 until the bike starts.**** 6. After the bike starts, let it warm up
for 1 minute. Make sure the white choke lever is in the open
position ( white lever UP ). 7. The bike is now ready to ride.
* In certain
weather conditions, you may put the choke lever in the middle
or lower position to help make it easier to start. ** Starting may require several tries when the bike is
still new. After break-in, the bike will start up with only
one or two pull procedures.
*** It may help to give the bike a little twist of the
throttle on the 3rd quick pull if the bike is hard to start. **** In colder climates, pre-heating the motor with a
makes it much easier to start the engine.
do I check and adjust the chain tension?
For all pocket bikes and mini dirt bikes, proper chain tension
This is especially true for bikes with a suspension
system such as the GP RS-R,
and the KTX Radical
Mini Dirt Bike.
1. Have the rider sit on the bike with his
or her full weight on the vehicle. 2. With your thumb and index finger, grab
the chain at its midway point between the two gear sprockets. 3. The chain must have play / wiggle room
of 1/2 inch to 3/4 inch.
If the chain moves more or less than the above parameters
( 0.5 - 0.75 inches ), you will need to adjust the chain tension
prior to riding. Failure to do so may result in the chain
breaking or falling off.
How to adjust Chain Tension:
1. Locate the two large axle nuts on either
side the rear wheel axle. 2. With two wrenches or socket drives, loosen
the axle nuts approximately two to three full turns.
3. Locate the two smaller nuts on
the eyelets (silver color) that are connected to the axle
towards the rear of the frame.
4. Either loosen or tighten the eyelet guides
to achieve desired chain tension ( 0.5 - 0.75 inches of play
( Turn small eyelet
nuts counter-clockwise to loosen chain. Clockwise
to tighten chain )
( Rotate the same amount on both eyelet
nuts. e.g. If you turn the left side 3 turns, turn the right
side the same turns ) 5. Now move the rear wheel in the direction
you need to by either pulling the wheel rearwards or pushing
( Move rear wheel forward to
loosen chain tension; Move rear wheel rearwards to tighten
chain tension ) 6. Check for proper chain tension before
tightening up the Large axle nuts. 7. After desired chain tension has been achieved,
tighten both Large axle nuts in the opposite way of STEP 2.
( The smaller eyelet
nuts do NOT need to be re-tightened. They only works as guides.
The nuts are designed not to come loose ) 8. Your bike is now ready to ride!
do I adjust the Speed Governor on my Pocket Bike?
There are two ways to limit the top speed of our engines.
This limiter is used for beginner riders or for those who
are not yet comfortable going maximum speeds.
The first way is to move the choke lever on the carburetor
to a position that is anywhere between fully opened and fully
closed. The choke lever can be accessed via hand without the
use of any tools on the right side of the vehicle. Normally,
for full-on unregulated top speed, the choke lever is fully
opened (in the down position). However, this lever can easily
be moved up anywhere you feel comfortable. The engine will
then be receiving less air, and the vehicle will consequently
run at the pace you set it at. To compensate for less air,
you may turn the petcock fuel valve ( the white valve lever
) at about a 45 degree angle to allow a slower flow of gas
to match the lower air intake volume so your motor will not
run rich ( if you see excessive white smoke from the exhaust
The second way will be to adjust the actual throttle travel.
The concept is similar to limiting the gas pedal travel on
an automobile. The less "gas" you are able to give
the car, the lower its top speed. To do this, you can adjust
the throttle cable slack via the tensioner on the throttle
grip box. Simply slip off the rubber dust boot / sleeve and
loosen the tension ring by hand (no tools necessary) and turn
clockwise until you get your desired speed.
Then tighten the tension ring and you are ready to go.
* Depending on the type of carburetor installed on your vehicle,
there may be another similar adjustment knob on the carburetor,
also covered by a rubber boot. You can locate this knob by
tracing where the throttle cable enters into the carburetor.
not stay on. How do I adjust the idle? Bike
wants to take off when idling. How do I adjust the idle?
the throttle cable, from the throttle grip on the handlebars,
all the way down to where the cable attaches to the carburetor.
Directly on the opposite side of the bracket where the
throttle cable is attached, you will find a small silver screw.
With a small flat head or Phillips screwdriver, rotate the
screw counter-clockwise to decrease
the idle and clockwise to increase
the idle. Rotate no more than 2 full turns at a time
to adjust properly. Repeat this process until the idle
If you are experiencing bogging only when accelerating or
if the engine wants to cut out when you twist the throttle
hard, there may be a crimp in the fuel line. The fuel
line is the rubber hose that connects from the bottom of the
metal gas tank, through a clear-white fuel filter and into
the top of your carburetor. Check this line to make
sure it is not bent or crimped. Sometimes, the metal
nipple extending down from the metal gas tank where the rubber
hose inserts into may be a little long, causing a 90 degree
bend in the fuel line. If this is the case and your
engine is bogging when accelerating, unplug the fuel line
going into the gas tank and saw off 1/4 to 1/2 inch of the
metal nipple and reinsert the fuel hose. This should
give the proper clearance so that the fuel line runs to your
do I fill air in the tires? What is the correct PSI? The tires have valves
similar to bicycle tires. Any air filling device designed
for bicycle tires will work for these tires as well. The
correct pressure is 30 PSI in front and 32 PSI in the rear
tires. ( For riders above 170lbs, fill 32 PSI front &
34 PSI rear ).
How long is the break-in
period? When the bike is new, it is recommended that it
not be run at max RPM's for more than 1 minute at a time during
the initial break-in period, which is about 3-4 tanks of gas.
After that, you may run the bike as hard as you want.
long can these bikes be ridden continuously? We recommend that you give these bikes a cool down
period of 10 minutes between each tank of gas, depending on
the weather. However, our test riders ride these bikes continuously
for over three hours on a regular basis without any problems.
long is the riding time per tank of gas? This really depends on the riding conditions. One
tank of gas typically lasts 1 - 1.5 hours in moderate riding
I broke a part on my bike. How can I fix it?
How to go about repairing your bike depends on which part is broken.
The majority of parts on these bikes can be repaired and replaced
by a regular do-it-yourself person. No special tools are needed.
If a part happens to break or needs replacing from wear and tear (such as brake pads and tires), please check the OEM PARTS section on our web site, email us directly at Contact us or call us Toll-Free at 1-877-MPR-BIKES
(1-877-677-2453). We offer replacement parts at 20 - 30% discounts if you purchased
your bike from us.
the Fuel Filter necessary? How do I replace it?Most of our bikes include an inline fuel filter installed
on the rubber hose that leads from the fuel tank to the motor.
It is there to add an extra layer of protection for the motor
in case debris is introduced into the bike’s fuel tank. If you
are careful in keeping contaminants out of your fuel tank, you
may bypass the fuel filter by purchasing a similar rubber hose
at your local auto parts store and cutting it to the length
needed to reach the fuel tank and the motor and discarding the
If you would prefer to use the fuel filter and need to replace
it, you may purchase one on our OEM
is leaking from the overflow tube. How do I stop it?
This is a common adjustment and it is due to the carburetor
float getting stuck. This can happen if the bike is laid on
its side or the vehicle sustained an impact. The tube is doing
what it was designed to do in this type of situation ( see
picture below of overflow tube ). To loosen the float inside
the carburetor, follow these simple steps:
1. With the bike standing upright, lift the
rear portion of the bike 18"
to 24" off the ground. 2. Drop the rear of the bike from that level
onto its rear tire. Do this forcefully, as it will not damage
the bike. 3. Repeat this procedure until the float
comes unstuck. You will know when gas stops flowing out of
the overflow tube.
* You are essentially bouncing the rear of the bike forcefully,
several times, to dislodge the float inside the carburetor.
Remember, you are always welcome to call us Toll-Free (1-877-677-2453)
for assistance to these or any other questions.