Daymak Tokyo User manual

Tokyo Electric Bike
User Manual

About Daymak
Daymak is one of Canada’s largest Alternative Vehicle providers. We design, engineer, man-
ufacture, import and repair everything from recreational dirt bikes, go-karts and electric
golf cars to alternative transportation solutions such as e-bikes and gas scooters.
Our electric bicycles represent an energy-ecient and eco-friendly alternative for people
who need to get around the city. They greatly increase the practicality of bicycle transpor-
tation in urban centres. Costing only a few cents to charge, an e-bike can make city life
more convenient and much less expensive.
While there are many new Green technologies that are still in their infancy, electric bicycles
have been developing over the last 40 years or more. E-bike technology has been dramat-
ically rened since the introduction of the rst custom-conversion bicycles. Today, electric
bicycles are a supremely reliable and aordable means of transportation.
Daymak is constantly developing new eco-friendly alternative transportation strategies,
led by its own Research and Development department in Toronto, Canada. We are always
improving our products. Our innovative in-house engineering and quality testing provide
customers with many new kinds of reliable, eco-friendly vehicles, designed to help change
the lives of our customers and the world.
Daymak warranties, services, and stocks parts for everything it sells. We support our prod-
ucts.
Please feel free to visit our website. You’ll nd the latest in cool transportation solutions,
support for the products you’ve purchased and contact information.

Table of Contents
Introduction......................................................................................................................................................4
Bicycle Part Diagrams ...................................................................................................................................5
Riding Instructions .........................................................................................................................................6
Operating Instructions ...............................................................................................................................10
The Battery .....................................................................................................................................................12
Technical Data ...............................................................................................................................................17
Maintenance and Troubleshooting .......................................................................................................20
E-Bikes and Canadian Law ........................................................................................................................25
TPSTraining Bulletin.....................................................................................................................................27

4
Introduction
E-Bikes
Riding an electric bicycle is a great way to hop around town conveniently and cheaply. E-
Bikes represent a natural progression in the development of urban transportation.
Using only small amounts of electricity, e-bikes have the potential to radically reduce the
amount of pollution in our cities. As well, they are very quiet, so they do not add to the high
levels of noise pollution which we often take for granted. They are easy, and usually free,
to park. They are unobtrusive and highly practical additions to the urban landscape.
E-bikes are also inexpensive. They (currently) require no registration, no insurance, no li-
cence and do not incur parking charges. As well, compared to internal combustion en-
gines, the engines in electric vehicles have fewer moving parts and require far less main-
tenance.
Your Daymak e-bike is the result of Daymak’s years of experience, the highly trained tech-
nical skills of our sta and careful, ongoing design work by our engineers. We hope you
enjoy using this product and welcome any feedback that you may have.
New Laws
Most provinces in Canada, most states in the U.S.A, the United Kingdom and many Euro-
pean countries have new laws that permit cyclists to use electric motors to assist the reg-
ular operation of bicycles. Please check with your provincial or state government to learn
about your local laws. At the back of this manual you will nd the some of the common
Canadian provincial regulations that govern e-bikes.
Liability
Daymak does not assume any liability for damages, loss of prots, or claims from third
parties due to improper use of this product. Daymak does not assume any liability for dam-
ages due to problems with the product resulting from service by a third party that is not
certied by Daymak.
The information in this guide may be subject to change without notice. For the latest infor-
mation available, please contact your local Daymak dealer or visit our website.
We have taken all possible measures to ensure the accuracy and completeness of the in-
formation in this guide. However, if you do nd anything missing, incomplete or wrong, do
not hesitate to contact us.

5
Bicycle Part Diagrams
Diagram 1: The Tokyo Electric Bicycle
This diagram illustrates the various parts of your bicycle. Please note that many of these parts are not us-
er-serviceable and should be repaired only by trained professionals. This is especially true of the electrical
systems and the mechanical components.
1
2
3
4
5
6
7
8
12
10
11
9
17
19
18
13
14
15
16
1. Seat
2. Taillight
3. Rear Mudguard/Fairing
4. Rear Wheel
5. Rear Shock Absorber
6. Hub Motor
7. Controller (inside)
8. Kickstand
9. Battery (inside)
10. Battery charger slot
11. Front Fork
12. Wheel Rims
13. Tire
14. Front Mud Guard
15. Headlight
16. On / Off key switch
17. Handlebars
18. Pedals
19. Seat Compartment

6
Riding Instructions
This guide assumes that you already know how to ride a standard bicycle. Before you try
to ride an electric bicycle, you should be very familiar with controlling and balancing a
normal bicycle.
Caution
If you do not have cycling experience, an e-bike is too dangerous to ride. Do not begin
learning to ride a bicycle using an e-bike.
Important Notes
• Ebikes are Fast! E-bikes are capable of traveling at higher speeds than many bicy-
cle riders are accustomed to. Use caution at all times, especially when travelling
in mixed trac. Always take into account driving and traveling conditions.
• Obey the Law. Be sure to follow all provincial and city traffi c laws. This includes
obeying stop signs, checking carefully when turning, and riding defensively. An
e-bike is a motorized vehicle, even though it is classed as a bicycle. You must fol-
low the law.
• Stay Sober. Never ride your bicycle while intoxicated. An e-bike is capable of trav-
eling faster than a normal bicycle, and you should always be in control of it.
• Share the Road. Be careful in mixed traffi c. When on bicycle paths, traveling near
pedestrians, or on recreational trails, try to be polite and courteous to those using
the paths with you. E-bikes are new in most cities, so other users of the roads and
recreational paths may not know how to deal with e-bike riders. Bear in mind that,
in a sense, e-bike riders are “ambassadors”for this new method of transportation.
Items to Carry with the Electric Bike
It is a good idea to carry the following items with you at all times when you ride your e-bike.
• The charger, to charge the bike in case the battery power runs out
• 30 Amp Fuse, spares for the batteries, in case the fuses blow
• A lock, to secure your e-bike when you park it
• A helmet, as required by safety laws

7
Inspecting your Electric Bike
Always inspect your e-bike before you ride it, to make sure its safety features are oper-
ating properly. Many accidents can be avoided with routine inspections. Once you are
comfortable with your e-bike, you will be able to detect small changes in the way it feels.
If anything changes between uses, make sure to have it properly examined. Also, be sure
to listen for changes in the sounds your e-bike makes over time. Any mechanical or power
issues may have eects on the sounds the bicycle makes.
Holding the Handlebars
As with a normal bicycle or gas scooter, place your ngers over the brake levers, using the
palms of your hand and your thumbs to wrap around and under the handlegrips. Doing
this allows you to activate the brakes easily, by squeezing your hand, in case you have to
stop quickly. This is the safe way to control your electric bicycle.
Turning your E-bike On and Off
To turn on your e-bike, insert the key into the“ignition”, located just below the dash board,
and turn the key to the right. When your e-bike is activated, the power indicator will light
and the battery charge indicator will jump, showing you how much power your e-bike
has. To turn o the e-bike, simply turn the key to the left, and remove the key.
Warning
When you activate the e-bike, the electrical system becomes live. Do not try to aect
changes to the E-Bike (such as removing the battery or repairing electrical components)
while the E-Bike is activated. Turn the E-Bike o and remove the key before you attempt
to access any of the electrical components. Also, the battery carries a signicant electric
charge and can injure people if not treated properly and with respect.
Accelerating and Decelerating
The throttle is found on the right-side hand grip on the handlebars. Turn the grip forward
(away from you) to accelerate. To decelerate, release the grip (turn it towards you). Don’t
over-rotate the accelerator, as this could damage the battery and electrical components.
Warning
Do not activate the accelerator until you are seated on the bicycle and are ready to accel-
erate. The e-bike can easily escape from your control, possibly injuring you or others, and
the e-bike may be damaged by being dropped.

8
Stopping
Your e-bike has two sets of brakes, at the front and at the rear. The levers attached to the
handlebars, on the left and right, activate the brakes. Pull the levers toward you to activate
the brakes.
You can use both brakes to come to a stop more quickly, or you can use one of the brakes
to come to a gentle stop, depending on your riding needs at the moment.
When the brakes are activated, the power to the engine is automatically turned o, until
you release the brakes. This allows you to stop safely.
Safety Tips
• When you are traveling in wet weather, water may cause your brakes to function
less eciently because it reduces friction between the brake pads and the wheels.
Take care to slow down and give yourself more room to stop or slow if necessary.
• It is a good idea to have your brakes and brake pads checked regularly. The brake
pads will eventually wear down through friction, and after signicant use will have
to be replaced.
Signalling
The Horn
The e-bike has a horn. The horn button is on the left handlebar. Simply press it to activate
the horn.
Turning Signal Lights
Your e-bike has turn signal lights. The turn signal activator is on the left handlebar. Push it
left or right to activate it to indicate that you are turning in the appropriate direction, and
press the middle of the button to turn it o. The turn signals also emit a noise, to ensure
that everyone knows you are turning. This turn signal cannot be disabled without also
disabling the visual signal.
Lights
The headlight and taillight are useful features when you are riding at night or in dark areas.
They radically improve your safety in mixed trac. The switch is located on the left handle-
bar. The lights on your e-bike consume some electricity. Keeping them on may reduce the
maximum distance you can travel on one charge by about 5 %.

9
Pedaling
This e-bike is designed to be a motor-assisted bicycle. You can use the motor by itself, but
ideally, you can work with the motor by pedaling. This increases the distance you can
travel on your e-bike, because it assists the motor and reduces the amount of electricity
you draw from the battery.
Riding in Wet Weather
Your e-bike is designed to function in wet conditions, such as when it is raining. However,
because the motor is on the rear wheel, it is easy to slip when moving at high speeds. If it
is very wet, be sure to avoid high speeds.
When you are traveling in wet weather, water may cause your brakes to function less ef-
ciently because it reduces friction between the brake pads and the wheels. Take care to
slow down and give yourself more room to stop or slow if necessary.
The Motor and Water
Your e-bike is not designed to be immersed in water. Always ensure that the water level
does not go above the middle of the tire, to prevent water from getting inside the motor.
Water in the motor can cause short-circuits and may damage the electrical systems in your
e-bike.
Riding in Cold Weather
Your e-bike is designed to operate year-round. However, in very cold conditions or when
there is a lot of snow or slush on the ground, it is possible for the motor in the e-bike to get
wet or for the brakes to function less eciently, just as can happen in wet weather. Below
10 degrees Celsius, the battery will not work as well as it would in warmer temperatures.
While Lithium-Ion batteries perform better than Lead-Acid batteries in temperature ex-
tremes, both will experience reduced performance in cold temperatures.
Also, riding the e-bike in cold temperatures may require you to replace the battery sooner
rather than later.

10
Operating Instructions
Using the Rear Storage Compartment
The rear storage compartment is opened using the key provided to you when you pur-
chased your e-bike. Insert the key and turn it to the right to open the compartment. Close
the case and turn the key in the opposite direction to lock the compartment again. You can
use this compartment to store the charger and associated cables, so you can
recharge your e-bike if it runs out of power. It can also hold a locking mechanism, such a u-
lock, for added security when parking your e-bike. The space provided is perfectly suited
for these purposes.
Opening the Seat Trunk
To open the seat trunk, insert the key into the lock on the left side of the e-bike just below
the seat. Turn it all the way to the right. The seat will snap open and pop up.
To close the seat trunk, make sure that there is nothing blocking the locking mechanism,
such as items you have placed in the storage compartment, and push the seat down with
force. You will hear a “click” sound when it is properly closed.
Parking and Locking your E-bike
When you want to park your e-bike for a short time, either when you have reached your
destination or are at home, follow these steps:
1. Stop the e-bike and position it as you want it.
2. Get o the e-bike, making sure to keep it balanced.
3. Stand to the side and slightly to the rear of the e-bike.
4. Hold the kickstand with one foot, and hold on to the e-bike by the rear basket
bracket.This bracket is made of metal and will hold the e-bike’s weight.
5. Pull the back of the seat up and towards you. The e-bike will move backwards.
The kickstand will hold the e-bike in place and anchor the bike.
6. Lock your e-bike to a bicycle locking post or other secure object through the rear
wheel frame or one of the metal frame components.
Warning
Do not let your e-bike drop or fall. The exterior may be damaged. The fall may damage
other components inside the e-bike, as well.

11
Maximum Load
Do not exceed the maximum load capabilities of your e-bike. You can nd the exact load-
ing capacity listed in the technical specications in this guide.
If you exceed the maximum load, the performance of the bike will suer.
Exceeding the maximum load of your e-bike could cause damage to the shocks, to the
mechanism and, ultimately, even to the frame. It could also cause your motor to work too
aggressively, and it may burn out.
Disconnecting the Circuit Breaker*
When the circuit breaker is disconnected, all power from the battery to the e-bike is
blocked. This is useful if you are going to store your e-bike or if it is damaged and you wish
to bring it to be serviced.
Disable the circuit breaker using the following very simple procedure.
1. Open the seat compartment.
2. Find the circuit breaker switch (it should be very obvious).
3. Activate the switch. The power to the e-bike will be disabled.
Long-Term Storage of your E-bike
If you are storing your bike for a long period, disconnect the circuit breaker. This is a saf-
er way to store the electric bicycle, as it prevents accidental activation of the e-bike and
makes it impossible to activate it even with the key. The circuit breaker is found by open-
ing up the battery case. It sits between the battery and the controller.
Please see the section titled “Your Battery” for instructions on battery maintenance while
your e-bike is being stored.
*Your bicycle may or may not have a circuit breaker. If it is not clearly visible in the seat compartment, it is likely that your bike does not
have a circuit breaker and thus this section does not apply.

12
The Battery
This section details what you need to know about the battery that powers your e-bike.
Always remember to treat your e-bike’s electrical systems with respect.
Battery Power
The dashboard has a battery charge indicator. When the e-bike is activated, the needle will
jump and indicate the currently available battery power.
If the power has dropped signicantly, you should charge your e-bike.
Distance and Power
Your battery has the capacity to carry you anywhere from 35 to 50 km before it must be
recharged. The ability of your battery to power your bicycle depends on many variables.
These variables include the weight of the rider, the prevailing wind resistance, the rider’s
driving habits, the presence of steep hills and inclines, and other issues such as proper air
pressure in the tires.
Saving Power
If you are traveling long distances, you can save a lot of electricity by using better driving
habits:
• Coasting: When going downhill or over long, at road surfaces, try using your e-
bike’s momentum and allow it to coast, without drawing power from the motor.
• Stopping and Starting: Try to avoid stop and go movements. The motor draws
more power when starting from a full stop.
• Weight: Remove unnecessary weight from the bike. This reduces the amount of
power the motor must draw.
• Air Pressure: Make sure your tires have the proper air pressure. Proper pressure
reduces drag on the tires and radically increases the eciency of any vehicle.
• Head and Tail Lights: Turn o the lights to conserve power, if it is safe to do so.
The lights will reduce the distance you can travel by about 5%.
• Pedalling: When accelerating from a full stop, you might want to try pedaling to
help acceleration

13
Charging your E-Bike
Charging your e-bike is a simple process. You require the following:
• The charger that came with your e-bike.
• A 110V household electrical outlet.
Charger Warning
Only use the chargers that were supplied with your e-bike. Using chargers that do not
have specications identical to those which came with the e-bike could irreparably dam-
age your e-bike’s battery and electrical systems, and may cause injury.
To charge your e-bike, follow these steps:
1. Turn o the e-bike and remove the key from the “ignition.”
2. Plug the female end of the charger cable into the charging slot on the e-bike.
This is found on the outside casing of the e-bike, in front of and just underneath
the seat.
3. Plug the male end of the charger power cable into your wall socket. This should
be a110v household electricity supply. You can also use a portable generator, if
necessary, but make sure it provides 110V current.
4. Allow the e-bike’s battery to charge for the appropriate amount of time (6-12
hours).
5. Disconnect the charger when the LED light on the charger is green. The batteries
have been fully charged.
If your charger’s LED status light does not change from red to green over an extended
period of time, for perhaps more than 14 hours, and the battery is very hot, the battery or
charger may need replacing. Stop charging and bring both to your Daymak dealer imme-
diately. Do not charge the battery.

14
Battery Care
Follow these suggestions to maintain your battery’s optimal performance. If you do not
follow these suggestions, your battery may lose its ability to maintain a charge and might
have to be replaced sooner than would otherwise be necessary.
• Charge it: Charge your battery immediately after riding it.
• Full Charge: Do not allow the battery to run down completely and lie in storage
without a charge. This signicantly reduces the battery’s lifespan and may cause
damage.
• Keep it Charged: When being stored, charge the battery occasionally to make sure
its power supply does not run down. Charging it once every 21 days should be
sucient.
• Storage Conditions: Store the battery on a  at, cool, dry surface. Do not allow the
battery temperature to drop below 10 degrees Celsius for extended periods of
time.
Warning
DO NOT place your Lead-Acid battery on concrete. Concrete drains the battery’s power
and will neutralize the lead-acid. Placing the battery on concrete for any length of time will
likely result in the battery being drained of power and possibly losing its ability to store
electricity.

15
Cold Weather and your Battery
Below 10 degrees Celsius, the battery will not work as well as it would in warmer tempera-
tures. While Lithium-Ion batteries perform better than Lead-Acid batteries in temperature
extremes, both will experience reduced performance in cold temperatures.
Also, repeatedly riding the e-bike in cold temperatures may cause your battery to have to
be replaced sooner.
Handling the Battery
The battery contains large amounts of electrical power. You must use caution and respect
when handling it. Not following these instructions can result in serious injury.
Warning
Follow these instructions closely. Use care when handling your battery.
• Always lift the battery with both hands, and carry it with care. Never drop the
battery. If the case is damaged, the contents may leak out.
• Never puncture or open the battery case. The contents are dangerous and may
cause injury. Do not touch the contents of a leaking battery. Seek help immediate-
ly.
• Do not touch the two metal poles on the battery box at the same time. This can
cause a short-circuit. It could injure you or others and cause serious damage to
the electrical systems in the e-bike. Your battery contains signicant amounts of
electrical power.
• Do not handle your battery if either you or the battery are wet. Water is an ex-
cellent conductor of electricity. You may experience an electrical shock, and you
may be injured.

16
Replacement and Disposal
After approximately 300 charges, a lead-acid battery will need to be replaced. A lithium-ion
battery will last approximately 1500 charges. When the battery has to be replaced, you will
notice that your battery cannot carry as much of a charge as it could initially.
Contact your local Daymak dealer to purchase a new battery.
When replacing your battery, dispose of it at a proper municipal battery recycling facility.
If none is available, please contact your local Daymak dealer.
Warning
Be absolutely sure that you replace the battery with an identical or
very similar battery. While it is possible to change the battery format or power levels, this
requires advanced knowledge of electrical systems. If improperly done, this can result in
immediate and irreparable damage to the electronic controller and electrical systems. Be
absolutely certain of what you are doing before you replace the
battery with a dierent type of battery.
Using the wrong type of battery will also void your warranty.

17
Technical Data
This section provides you with the technical specications for your e-bike.
The Motor and Wheel Assembly
The Smart Bike has a 500 Watt magnetic DC brushless motor on the rear wheel hub. This type of motor has
excellent low-end torque and high effi ciency when working within its range. Note that while the motor is
very quiet, it does produce some noise. Also attached to the rear hub are speed reduction gear and the
speed free clutch.
The Freewheel
The wheels have freewheels, so the e-bike’s drive train is not xedly geared. This means that when coasting
or traveling downhill, you can turn o the engine and your e-bike will continue to move without slowing.
This feature will allow you to achieve faster speeds when coasting, moving downhill or moving with the
wind. It will also allow you to conserve electrical power, because you will be able to let to the motor rest
while moving.
The Controller
Daymak pioneered the development of intelligent component control in e-bikes. The “D- Drive”technology
developed by Daymak is the brain of your e-bike. It allows your e-bike to achieve faster acceleration, to climb
steeper hills, and to save energy. In future, it will allow for other ways of recharging your e-bike’s batteries,
such as by using solar or wind power.
The electronic controller is located under the seat assembly. This controller eciently regulates the speed
and electronic functions of the bicycle. It allows for stepless speed adjustment, shuts o the motor when
the brakes are activated, has low voltage protection and has fuses to prevent excess current from damaging
the e-bike’s systems.
The Governor
A key component of the controller is the Governor. The Governor regulates the speed of the e-bike. It pre-
vents the motor from assisting riders when the e-bike’s speed surpasses
32 km per hour.
The governor’s primary function is to make sure that the motor functions eciently. If the governor is not
functioning, the mileage of the e-bike will be dramatically reduced, and its performance will suer.
Disabling the governor voids the warranty, and may damage your controller.
This speed limitation to 32 km per hour is required by government regulations. Traveling faster than 32 km
per hour through motor power alone is illegal in Canada and could result in serious nes or penalties, unless
your vehicle is insured for liability, is registered and you are licensed to drive.

18
The Brakes
Front Brakes
The brakes on your e-bike are drum-brakes, like those found on gas scooters and motorcycles. They generally
provide for very ne stopping and control. This is a very tested and well-designed technology, but even so,
the brakes will require servicing from time to time, and may have to be adjusted for tension.
Unlike normal friction-grip bicycle brakes, which clamp down from the outside, the drum brakes clamp from
the inside. When the brakes are activated, tension increases and the clamps engage. This is a very eective
and reliable way to stop a vehicle.
The brakes are contained within a sealed unit, and are very nely adjusted and tted.
Rear Brakes
The rear brakes on your e-bike are EABS Brakes (Electric Absorption Braking System). These provide a good
friction-grip when they are activated. They signicantly less than standard drum brakes. Using these brakes
helps to reduce the weight of the e-bike and improve its performance.
The Chain and Pedals
The pedals are connected to the rear wheel. Along with the chain, they provide a human- powered “drive
train”. This is an important part of your e-bike. The pedals are not removable and should not be removed.
Shock Absorbers
Your e-bike is equipped with Reverse Shock System shock absorbers. These eective but simple devices
absorb the energy from bumps and dips, and allow you to have a much more comfortable ride. The Reverse
Shock System is superior to normal Monoshock shock absorbers usually found on e-bikes, and provides for
a much more comfortable ride.
While they are very resilient, please note that very sharp or large shocks, such as drops from a height of 15
cm or more, can cause serious damage to your shock absorbers. Replacing them is a complex and time-con-
suming task, so do be careful when dropping from larger heights.

19
Basic Statistics
Electrical System Statistics
Wiring Diagram
Dimensions
Wheel Size: 2.125”x18”
Body Size: 155x34x94cm
Seat Height 75cm (29”)
Weight
55 kg without battery
65 kg with battery
Loading Capacity
Standard: 75 kg
Maximum: 115 kg
Speed and Mileage
Max. Speed: 32 km/h
Max. Mileage: 50 km
Motor Statistics
Voltage: 48V
Working eciency: 70-80%
Max. Climbing Angle: 12-15
Degrees
Charger Statistics
Charger Input: AC 100 – 240V
Standard Input voltage: 110V
+/- 10%
Charge Time: 6-12 hours
Battery Statistics
Type: Lead Acid Battery
Rated Voltage: 48V
Battery Life: 300 charges
Rated Total Capacity: 500Wh

20
Maintenance and Troubleshooting
This section outlines problems you may have and solutions you may be able to use.
Many of the parts in this product are not user-serviceable and should be repaired by
trained professionals. This is especially true of the electrical systems and the mechanical
components. Alteration of these components voids the warranty.
Tire Pressure
Maintain the air pressure in your tires at the appropriate level. If the air pressure is too low,
your e-bike’s performance will suer and it will become damaged more easily.
Cold weather and lower temperatures will cause the air pressure in your tires to drop, and
warmer weather will cause it to increase, even if there are no leaks in the tire tube. To re-
place the air in your tires, follow this procedure:
1. Identify the required pressure by examining the text along the side of the tire
rim. This text should indicate the recommended pressure for your tire.
2. Locate the air valve on the inner surface of the tire rim.
3. Remove the valve cap and place in a secure location.
4. Place the nozzle end of an air pump (hand-power or mechanical) over the valve.
5. Pump up the air in the tire, being careful not to let the pressure go above the
level prescribed on the side of the tire wall.
6. Remove the pump nozzle from the air valve without allowing much air to escape
from the tire.
7. Replace the valve cap on the air valve.
Maintaining the proper air pressure will allow you to travel much further on a single charge,
because the motor will not have to work as hard to move the e-bike.
Replacing Flat Tires
Replacing at tire tubes is a more complicated and labour-intensive process with e-bikes
than it is with regular bicycles. It requires proper tools, more skill and more patience.The
front wheel is easier to service when changing a at tire than the rear wheel, as the rear
wheel is connected to the hub motor and other mechanical parts.
Unless you are very familiar with the mechanical components of the rear motor, attempt-
ing to change a at rear tire may cause serious problems. Please contact your Daymak
dealer for specic instructions on how to remove your wheel and tires safely, and how to
replace the tubes.
It may be easier – and safer - to have the tubes replaced by your Daymak dealer.