Cobra Moto CX50 FWE User manual

Owners
Parts
Service
Tuning

2
For parts orders, contact your local dealer.
To locate your closest Cobra dealer, log on to
www.cobramoto.com
or call
+1 (517) 437 - 9100
Cobra MOTO, LLC
240 Uran Road
Hillsdale, MI 49242
USA

DISCLAIMER OF WARRANTY
This motorcycle is sold “as is” with all faults, obvious or not. There are no warranties expressed or
implied, including any warranty of merchantability and warranty of fitness for any particular purpose.
“WARNING”
THE COBRA CX5E IS A COMPETITION MODEL ONLY AND IS NOT MANUFACTURED FOR, NOR
SHOULD IT BE USED ON PUBLIC STREETS, ROADS, OR HIGHWAYS.
THE USE OF THIS BIKE SHOULD BE LIMITED TO PARTICIPATION IN SANCTIONED
COMPETITION EVENTS UPON A CLOSED COURSE BY A SUFFICIENTLY SKILLED RIDER AND
SHOULD NOT BE USED FOR GENERAL OFF-ROAD RECREATIONAL RIDING.
IMPROPER USE OF THIS MOTORCYCLE CAN CAUSE INJURY OR DEATH.
THIS BIKE IS INTENDED FOR EXPERIENCED RACERS ONLY AND NOT FOR BEGINNERS.
IT IS YOUR RESPONSIBILITY AS THE OWNER OF THIS COBRA MOTORCYCLE OR AS THE
PARENT, OR LEGAL GUARDIAN OF THE OPERATOR, TO KEEP THIS COBRA MOTORCYCLE IN
PROPER OPERATING CONDITION.
THIS BIKE WAS DESIGNED FOR RIDERS THAT WEIGH LESS THAN 80 LBS WITH FULL RIDING
GEAR AND SHOULD NOT BE OPERATED BY RIDERS THAT WEIGH MORE THAN THAT.
BE SURE THAT THE RIDER ALWAYS WEARS ADEQUATE SAFETY GEAR EVERYTIME HE OR
SHE RIDES THEIR COBRA MOTORCYCLE.
IMPORTANT SAFETY NOTICE
Failure to follow WARNING instructions could result in severe injury or death to the machine
operator, a bystander, or a person inspecting or repairing the machine.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage to the machine.
NOTE: A NOTE provides key information to make procedures easier or clearer. MCCE12023.0

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Table of Contents
GENERAL INFORMATION ..................................................................................4
SPECIFICATIONS -GENERAL......................................................................................................... 4
OPTIONAL SUSPENSION COMPONENTS......................................................................................... 5
SPECIFICATIONS -TORQUE VALUES............................................................................................. 6
POWER UP PROCEDURE ............................................................................................................... 7
MAINTENANCE ...................................................................................................9
TIPS ............................................................................................................................................. 9
SCHEDULE ................................................................................................................................. 10
REPLACING MOTOR COOLING FLUID......................................................................................... 11
PROPER CHAIN ADJUSTMENT ..................................................................................................... 11
REAR BRAKE MAINTENANCE..................................................................................................... 13
FORK MAINTENANCE................................................................................................................. 14
Fork Air Bleeding ................................................................................................................ 14
Fork Oil Replacement.......................................................................................................... 15
DISASSEMBLY PROCEDURE ........................................................................................................ 15
PARTS –BARS AND CONTROLS.................................................................................................. 17
PARTS –BATTERY ..................................................................................................................... 18
PARTS –COOLANT SYSTEM ....................................................................................................... 19
PARTS –ELECTRICAL SYSTEM................................................................................................... 20
PARTS –ELECTRONICS BOX....................................................................................................... 21
PARTS –FORKS &TRIPLE CLAMPS............................................................................................ 22
PARTS –FORKS –LEG ASSEMBLY –BRAKE SIDE ...................................................................... 24
PARTS -FORKS –LEG ASSEMBLY –NON-BRAKE SIDE............................................................... 26
.................................................................................................................................................. 26
PARTS –FRAME &SUBFRAME................................................................................................... 28
PARTS –FRONT BRAKES............................................................................................................ 29
PARTS –FRONT WHEEL............................................................................................................. 30
PARTS –MOTOR SYSTEM -INTERNALS...................................................................................... 31
PARTS –PLASTIC BODYWORK &SEAT ...................................................................................... 34
PARTS –REAR BRAKE ............................................................................................................... 36

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PARTS –REAR WHEEL............................................................................................................... 38
PARTS –SHOCK ......................................................................................................................... 39
PARTS –SHOCK -INSIDE............................................................................................................ 40
PARTS –SWINGARM ASSEMBLY ................................................................................................ 41
SERVICE............................................................................................................42
MOTOR COOLING FLUID REPLACEMENT.................................................................................... 42
REAR WHEEL PULLERS ............................................................................................................... 42
BRAKES ..................................................................................................................................... 43
FRONT FORKS ............................................................................................................................ 43
REAR SHOCK ............................................................................................................................. 43
TUNING..............................................................................................................44
GEARING.................................................................................................................................... 44
Front Fork Operation.......................................................................................................... 45
Fork Damping Adjustments................................................................................................. 45
Rear Shock Adjustments...................................................................................................... 46
TROUBLESHOOTING........................................................................................48

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General Information
Specifications - General
Items
CX50 FWE
Dimensions
Wheelbase
41” (1041mm)
Wheel size
10” (254mm) rear, 12” (305mm) front
Seat height
26” (660mm)
Motor
Type
Cobra –out runner
Cooling system
Liquid-cooled
Coolant
Cobra Motor Cooling Fluid, 500 ml
Final drive ratio
10/50 T
Chain
110 links 420
Chassis
Front tire
2.50 (60/100) - 12"
Pressure
16 psi minimum
Rear tire
2.75 (80/100) - 10"
Pressure
16 psi min. (20 psi for hard pack or rocky conditions)
Front fork
CARD 32mm USD Fully Adjustable w/ Smart Leg
Fork oil type
5wt Fork Oil
Fork oil amount
150 ml
Std settings (turns)
Smart leg: 1.5 out, Compression and rebound 2 out
Rear shock (std. settings)
Compression: Low 12 clicks out, High 15 clicks out
Rebound 16 clicks out, Race/Free sag 75/25mm
Free sag 25mm

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Optional Suspension Components
Weight of Rider (lb)
Fork Spring
Shock Spring
Less than 50 lb
0.23 kg/mm
KCCS3223
green, 2.9 kg/mm
SCKGFX29
50-60
0.25 kg/mm
KCCS3225
black, 3.1 kg/mm
SCKGFX31
60-75
0.25 kg/mm
KCCS3225
red, 3.3 kg/mm
SCKGFX33
Greater than 80
0.27 kg/mm
KCCS3227
gray, 3.5 kg/mm
SCKGFX35

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Specifications - Torque Values
Fastener
Torque Value
LoctiteTM
Size &
Remarks
ft-lb
in-lb
Nm
Phase & power to MDU
4.4
53
6.0
No
M5 x 0.8
Phase wires to Motor
3.7
44
5.0
no
M6x1.0, copper
Motor mount bolts
22
265
30
M8 X 1.25
Swingarm pivot
21
250
28
M14 X 2.0
Shock bolt
35
420
47
243
M10 x 1.5
Rear axle nuts
21
250
28
M12 X 1.25
Rear sprocket bolts
21
250
28
M7 X 1.0
Front axle aluminum bolt
18
221
25
Moly lube
M10 X 1.25
Fork guard alum bolts
6
88
8
243
M6X1, ALUM
Front axle pinch bolts
7.5
88
10
M6 x 1.0
Brake caliper bolts
9
106
12
243
M6 x 1.0
Brake caliper to carrier
7
84
9.5
243
M6 x 1.0
Brake pad secure
3
36
4
M5 x 0.8
Banjo bolts –brakes
15
177
20
M8 x 1.25
Brake rotor bolts
9
108
12
243
M5 x 0.8
Triple clamp bolt (top)
8
90
10
M8 x 1.25
Steering stem pinch bolt
9.5
115
13
M8 x 1.25
Triple clamp bolts (bottom)
6
72
8
M6 x 1.0

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Power Up Procedure
•Before Powering Up the machine inspect the following
oTire pressure
oChain tension
oCooling fluid level
oProper wear on chain rollers and sliders
oHandlebar tightness
oThrottle assembly movement
oCheck for loose nuts and bolts
•Turn the battery on by pressing the Power Button for 2 seconds
Always wear a helmet and other protective riding gear.
CAUTION: Make sure your rider’s foot is not resting on the foot brake while they are riding.
For charging...
Ensure good AC power....if not, fast charging may produce faults.... however, slow charge is
still an option on slightly bad power until we get some software updated.
Charging Procedure:
Plug Charger into AC, then Plug into battery with Positive wire towards the back of the
bike...while turning the lock ring clockwise to lock it down. Then press the battery power button
once and wait a few seconds. The voltage indicator on the battery will start flashing
slowly(slow charge). Then hit the battery power button one more time and the voltage indicator
will not start flashing faster. Slow Charge: 2 hours, Fast Charge: 1 hour. Once all the lights on
the indicator are solid and not flashing charging is complete.
There is a new "Pre-Race" charge mode... once battery is already full. Turn battery off with
long press on the battery power button....then back on. When the battery sees that it is already
charged it will run the “Pre-Race” algorithm… and prepares the pack for maximum runtime.
This will come with the molded case battery packs.
Don'ts:
1. Don't leave battery fully charged for weeks at a time.
2. Don't leave battery with 1 light on charge indicator for weeks at a time.
3. See washing best methods.
4. Coolant is not engine Anti-Freeze!....it is mineral oil based with special additives. Anti-
Freeze is conductive and the bike will not run.
5. There is coolant in the system even though you can't see it when taking the cap off. With the
bike on the stand and powered up, apply some throttle and you should see fluid flowing in the
radiator... that is all you need to see!
Do's:
1. 2 or 3 lights on battery indicator before storing. Bike can be plugged into battery when
stored.

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2. Check chain sliders and sprockets regularly.
3. Change cooling fluid every 3 months.
4. Lube chain each moto.
For those serious racers:
1. Warm up motor before racing for better starts. Feel radiator with hand until close to normal
running temp is reached.
2. Top off battery after warm up cycle. This is a balance as motor temp is cooling while
charging.
3. Adding a couple psi would improve top speed and runtime, but at the cost of a little initial
traction.
4. If run time is a priority, please see “Pre-Race” charge mode.
Change Bike Modes:
Bike must be disabled (“Active” light is off), before mode can be changed. Hitting the “GO”
button activates and deactivates the bike.
Add the LED light numbers to get the mode number. Hitting the upper Left Mode button cycles
through modes.
Modes:
1. Mode 1 is ~15mins of full power with a de-power at the last stage before going into turtle
mode....make sure they are aware. Applying a lot of throttle once in turtle mode will cause a
fault(with current software) stopping the bike. This is our normal race mode.
2. Mode 2 is 18mins of a gradual power reduction to increase run time....this is similar to how
competing bikes acts over a full battery run. Same peak power as mode 1.
3. Mode 3 is a lower power version of Mode 1(approx. 95%), Mode 4 is a lower power version
of Mode 2(95%)
4. Other modes are in flux, but there are slick track versions of mode 1 and 2 on Modes 5 and
6... they just have a softer feel. This probably will change based on feedback.
Holeshot Mode:
1. While not as much of a change from Holeshot to Race Stage after some recent software
updates... there is a power boost for the starting line. We are working on improvements to up
the "out of starting gate" performance even more and should have that available at LL.
2. It is automatically armed when the bike is "Active"... Once the throttle hits 100%, Holeshot
mode will engage for 8secs. If a false start happens and race restarted, then get back to the
gate and hit the "GO" button to deactivate, then reactivate with the "Go" button again. This
resets/rearms the Holeshot mode.
3. Small throttle blips will keep the bike from going to sleep as there is a 1 minute inactivity
timeout.
Washing:
1. Please pull the battery out of the bike to wash(it's just three 10mm nuts).... that would
eliminate 75-95% or more of the electrical problems ebikes tend to have either way.
2. Check for dirt/mud in main bike connector and clear with Q-tip or paper towel.
3. Wash RDU and Tank area sparingly, avoid direct pressure spray.
4. Allow ample drying time.