JTG JT300 User manual

JTG JT300
USER MANUAL

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Welcome to JTG!
Thank you for the confidence you
have shown in our brand by
purchasing this motorcycle designed
for Trial.
As a JTG user, you will enjoy a
product that offers innovation
where strictly necessary, without
excesses, incorporating
characteristics such as quality,
prestige and exclusivity.
Designed by off-road professionals
to offer comfortable and effective
service without forgetting a
competitive spirit, that will enable
you to experience the performance
of a winner, ready at your disposal.
JOTAGAS S.L. 2012

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JTG ADVISES YOU:
Please read this user manual carefully before using your motorcycle. In it you will find all the instructions necessary for correct
operation of the machine as well as for your own safety, enabling you to attain optimum maintenance and service life from the
very first day.
Please pay special attention to notes bearing these symbols:
In addition to the specific warning notes, this manual also contains other tips for better use of your motorcycle as well as better
adjustment and control of important features of the vehicle.
JTG reserves the right to modify this manual.
ATTENTION! This symbol refers to aspects which if ignored could cause damage to your motorcycle. Non-observance of
these warnings could render the guarantee void.
PRECAUTION! This symbol refers to aspects which if ignored could result in physical danger to the user.

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JTG RECOMMENDS:
In case of any doubt as to possible adjustments of your motorcycle, please follow the instructions contained
in this manual and/or contact an authorised JTG dealer.
Please read the information contained in this user manual and familiarise yourself with the features of your
vehicle before driving it at maximum power.
It is recommended to establish an initial running-in period of at least 8-10 hours for the engine to bed in,
during this period do not drive at high speed or full throttle. The first hours of use should be at moderate
speed only.
Fuel is highly inflammable. Take care when refuelling and always stop the engine first.
Before running the engine at high speed, it is important to have reached an optimum operating
temperature, especially when starting up the motorcycle or in low temperature conditions.
This motorcycle uses synthetic two-stroke oil mixed with 98-octane fuel in a 1% proportion. Do not use any
other type of lubrication without first consulting with an authorised JTG mechanic.
This motorcycle is designed to carry only one person; it is not permitted to carry a passenger.
For the longest possible service life, keep the motorcycle maintained according to the recommendations in
this manual.
This vehicle has been designed for safe riding, as long as the rider is equipped with the necessary safety gear
(Helmet, body protection, etc.). Take care and ride in a sensible manner.

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TABLE OF CONTENTS
Description of parts 7
Technical datasheet 9
Vehicle information 11
Starting and stopping the engine 12
The choke 12
Gear change 13
Fuel tap 13
Fuel tank 14
Tyres 15
Brakes 16
Steering lock 17
Side stand 17
Handlebar and instrument panel 18
Adjusting levers and the handlebar 19
Checking the oil level 19
Air filter 20
Sparkplug 21
Cooling system 22
Carburettor 23
Adjusting the tick over 24
Reed valve box 25
Transmission chain 25
Suspension 26
Swing arm 27
Maintaining the motorcycle 28
Speedometer 29
Torque values 33
Storage 34
Maintenance operations 35
Homologation 39
Troubleshooting 40

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DESCRIPTION OF PARTS
1- Clutch lever
2- Indicator, horn and stop
buttons
3- Brake lever
4- Accelerator
5- Radiator cap
6- Fuel tank cap
7- Starting pedal
8- Fuel tank
9- Radiator
10- Radiator drainage bolt
11- Sump oil level peep hole
12- Rear brake pedal
13- Engine breather
14- Fuel tap
15- Reed valve
16- Transmission chain
18- Gear change pedal

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19- Front fork
20- Spark plug
21- Silencer
22- Swing arm
23- Exhaust pipe
24- Water pump
25- Front mudguard
26- Front brake caliper
27- Ignition cover
28- Air filter cover
29- Carburettor
30- Centre stand
31- Rear sprocket
32- Speedometer
33- Front suspension adjustment
34- Footrests
35- Rear mudguard

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TECHNICAL DATASHEET
CHASSIS
Type: Double beam with lateral suspension system and built-in fuel tank
TYRES
Front: 2.75 x 21" - 44 (160 kg) L
Rear: 4.00 x 18" - 52 (200 kg) - L
SUSPENSION
Front: TECH Hydraulic telescopic fork COM-EX Ø39 mm (175 mm travel)
Rear: V3 progressive system with OLLE mono adjustable shock absorber (175mm travel)
BRAKES
Front: Disc, Ø185 mm, 4-piston caliper
Rear: Disc, Ø150 mm, 2-piston caliper
ENGINE
Type: Two-stroke, single cylinder, reed valve admission directly to the engine block, liquid cooled.
Cubic capacity: 301.58 cc
Piston diameter: 80 mm
Stroke: 60 mm
Carburettor: DELLORTO PHBL26
Lubrication system: 1% mixture (1:100)
Ignition: Digital CDI HIDRIA
Spark plug: NGK BPMR6A
Generator: 12V / 110W
TRANSMISSION

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Type: 5-speed with hydraulically operated clutch.
Secondary transmission: Chain.
Gear ratios:
1st 3.000 (33/11)
2nd 2.571 (36/14)
3rd 2.187 (35/16)
4th 1.444 (26/18)
5th 0.889 (24/27)
Primary reduction 2.778 (75/27)
Final reduction 4 (40/10)
Total ratio (5th gear): 9.879
Transmission oil: 400 cc, type GEAR TRANS 0W75
DIMENSIONS
Overall height: 1160 mm
Overall width: 833 mm
Seat height: 650 mm
Wheelbase: 1180 mm
Fuel capacity: 2.7 litres
Dry weight: 64 kg

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We recommend you take note of the serial number
and identification data of your motorcycle for use in
case of theft or to order spare parts.
VEHICLE INFORMATION
MANUFACTURER’S IDENTIFICATION PLATE (Under
the fuel tank)
This plate contains information regarding vehicle
certification, take note of this for easy identification of your
vehicle, when needed.
SERIAL NUMBER AND KEY CODE
These numbers identify your motorcycle and the steering
lock, take note of them in this manual (e.g. for ordering
new keys if you lose them).
1- MANUFACTURER’S IDENTIFICATION PLATE
2- CHASSIS NUMBER
3- KEY CODE
(Supplied with the keys)

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STARTING AND STOPPING THE ENGINE
To start the motorcycle, first make sure that the fuel tap is
open and that the gearbox is in neutral or if not, that the
clutch lever is pulled in.
Then push the starting pedal, located on the right-hand side
of the motorcycle. It will also be necessary to use the choke
when starting from cold.
To stop the engine, select neutral and press the stop button
on the handlebar.
THE CHOKE
Use the choke when the engine is cold to start without
causing damage to the engine. This device, when used
properly, will avoid excessive wear and mechanical damage
when starting in cold temperature. To activate it, lift the
black lever on the carburettor.

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GEAR CHANGE
The gear change is controlled by a pedal on the left-hand
side of the vehicle, the sequence is as indicated in the
illustration. At the same time as you change gears you
must disengage the clutch by pulling in the clutch lever on
the left-hand side of the handlebar. The gearbox is
sequential, i.e., to change from 2nd to 4th gear you must
first go through 3rd gear.
FUEL TAP
The fuel tap is under the fuel tank.
For the fuel to flow, the tap must be in the ON position. For
reserve, select the RES position and to shut of the flow,
leave the tap lever in an intermediate position between ON
and RES.

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FUEL TANK
This motorcycle’s fuel tank is built into the chassis, more
specifically the upper part of the chassis. It holds 2.7 litres
of fuel which should be lead free petrol with two-stroke oil
in the proportions specified on the technical datasheet. The
tank cap is at the top of the tank.
Petrol minimum octane rating: 98 octanes
Important. Do not mix vegetable and mineral oil. Respect
the specified levels and proportions for correct
combustion. For a homogeneous mix, first pour the oil
into a container and add some petrol, shake and then
add the mixture to the rest of the petrol. Avoid mixing at
low temperature, as this will make the operation more
difficult.

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TYRES
When riding on low adherence terrain, you can reduce the
pressure slightly in order to favour adhesion and vice-
versa.
Tyres in good state will significantly contribute to
your safety and will guarantee better driving
behaviour. Make sure the pressures are correct at all
times and check for wear. Pressure should be
measured when the tyre is cold.
TYRES
Front wheel:
2.75 x 21" TRIAL
Rear wheel:
4.00 x 18" TRIAL
RECOMMENDED TYRE PRESSURES
Front wheel:
0.45 bar (0.42 bar for competition)
Rear wheel:
0.35 bar (0.3 bar for competition)

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BRAKES
The brake fluid level can be checked through the peephole
on the front master cylinder and the fluid reservoir of the
rear master cylinder. The level must reach the middle, fill
both reservoirs if necessary. Use D.O.T. 4 brake fluid.
There are bleed nipples on both circuits in order to
eliminate air bubbles that could have entered the system
after any work has been carried out.
The brake pedal must have some free play.
You should regularly check the state of the front
and rear brake pads as well as the brake fluid level.
For your safety as well as precise and effective
riding, do not use the motorcycle with excessively
worn brake pads or brake fluid below the
minimum level. If the brake pedal has a spongy
feel, there may be air in the hydraulic system and
it will need to be bled.

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STEERING LOCK
The steering lock is located under the lower front fork triple
clamp.
To lock the steering, insert the key and turn the
handlebars right as far as they will go, then press and turn
the key anti-clockwise.
To unlock, insert the key and turn clockwise.
SIDE STAND
The side stand is on the right of the motorcycle, secured to
the chassis with a spring. Move the side stand out as far as
it will go in order to rest the motorcycle on it when
stationary. Never drive with the side stand unfolded.

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HANDLEBAR AND INSTRUMENT PANEL
The left-hand side of the handlebar
contains:
-Clutch lever.
-Horn.
-Engine stop button.
-Main/dip beam switch, and
indicator switch.
The instrument panel is in the centre
of the handlebar. (More information
and instructions for use provided
later in the manual)
The right-hand side of the handlebar
contains:
-Brake lever
-Throttle

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ADJUSTING LEVERS AND THE HANDLEBAR
Both levers must have a free play of 3 mm at the most.
This play must be present, do not eliminate it. To adjust,
use the adjustment nuts located on the levers.
To adapt the handlebar to different types of riding, you can
tilt it more or less by loosening the clamps that secure it to
the fork. When adjusted as desired, tighten the bolts again,
starting with the bolts closest to the seat and continuing
with those closest to the speedometer.
CHECKING THE OIL LEVEL
The engine holds 400 cc of transmission oil. Try to keep the
level between maximum and minimum levels for correct
operation of the engine.
Do not mix oils of different types, always top up with the
same oil. We recommend 0W 75 GEAR TRANS type oil.

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Oil change
There is a plug at the bottom of the sump for emptying the
oil and another plug at the top for filling.
To change the oil, start up the cold engine and let it tick
over for 5 minutes. This will heat the oil enough for
changing.
Then place a tray under the engine and remove the oil plug.
Let all the oil drain out and clean the plug removing any
possible metal filings. When it is clean refit and fill with new
oil through the upper filling plug orifice, until it reaches the
correct level in the peep hole.
AIR FILTER
After removing the filter, it can be cleaned using a
specific degreaser, then washed with water and
detergent, let the filter dry and then coat it with
special air filter oil. It is recommended to check the
state of the air filter regularly, to avoid problems
due to particles in the admission. Make sure you
clean it in a ventilated place, without sparks nearby
and do not use petrol for cleaning, as this could
cause an explosion.