Underbone Yamaha 135LC

Yamaha 135LC, also known as Yamaha Spark 135 in Thailand, Yamaha Sniper in Philippines Yamaha Jupiter MX in Indonesia and Yamaha Exciter in Vietnam, "Yamaha T 135 Crypton X" in Greece is a small underbone bodied motorcycle manufactured by Yamaha Motor Company which is also a moped or underbone model with the second-largest displacement behind Suzuki Raider 150. Powered by a liquid-cooled 135cc 4-stroke engine, the Y135LC is specially designed by the parent company in Japan for Southeast Asian market.

In 2008, the fuel-injected version of the Yamaha Spark 135 was launched for Thai market, making it the second underbone motorcycle using the fuel injection system after the Honda Wave 125i^[1].

Specification

• Model code: T135
• Engine: SOHC 4-valve 4-stroke 135cc water-cooled engine
• Cylinder arrangement: Forward-inclined single cylinder
• Displacement: 134.9 cc
• Max power: 8.45 kW (11.33 PS) @ 8,500 rpm
• Max torque: 11.65 Nm @ 5,500 rpm
• Max speed: 138 km/h^[2]
• Bore x stroke: 54.0 x 58.7 mm
• Compression ratio: 10.9 : 1
• Transmission: Constant mesh 4-speed
• Clutch: Wet, multiple-disk and centrifugal automatic (optional manual clutch model is also available)
• Fuel system: Fuel injection (2008 Yamaha Spark 135i in Thailand only); Mikuni VM22 carburetor with throttle position sensor (other countries)
• Frame Type: Diamond-shaped underbone steel tube
• Suspension (Front): Telescopic
• Suspension (Rear): Monoshock
• Brake (Front): Single-piston disc, Dual-piston disc - 135LC Extreme Spirit (Malaysian-spec models)
• Brake (Rear): Drum
• Dry weight: 103 kg
• Fuel tank capacity: 4.3 L

Features

Yamaha Sniper 135 Hand Clutch Version

• DiASil (die-cast aluminum cylinder) which has better heat conductance to dissipate excessive heat easily.
• Lighter forged piston
• Roller bearing rocker arms with less friction than typical rocker arms.
• 4-valve water-cooled engine - The 4-valve engine configuration provides better volumetric efficiency compared with other 4-stroke moped models which uses 2-valve engine design, enabling the engine to produce higher torque at high rpm. However, the engine displacement of 135cc limits the ability of air-cooling system while retaining the small kapchai design at the same time, therefore water-cooling system which has better cooling efficiency is used.
• Fuel injection (2008 Yamaha Spark 135i in Thailand only) for less dirtier emission and better efficiency than the carbureted version.
• Carburetor with throttle position sensor and accelerator pump (other countries) - The Y135LC uses Mikuni VM22 carburetor equipped with throttle position sensor for more precise ignition timing, increasing the engine's efficiency, and also an accelerator pump for better acceleration and instant response during take-off.
• Catalytic converter - Even though most 4-stroke kapchai models are capable to surpass strict emission standards without even using the catalytic converters, Yamaha has taken an initiative to install a catalytic converter to the Y135LC to surpass even stricter emission standards in the future.
• Sport rims with tubeless tires (standard for Malaysian models only)

Model history

The Yamaha Y135LC debuted in 2005 for Thai and Indonesian market before brought in Malaysian market in February 2006. The Y135LC was designed by the headquarters of Yamaha Motor Company in Japan for Asean market. The model was very successful in Southeast Asia especially in Malaysia.

To promote the Y135LC, Yamaha organized an Asean road tour known as the Yamaha Pan Asean Tour, traveling 9,000 km on roads in Thailand, Malaysia, Singapore and Philippines, which ended on May 2006.

Yamaha 135LC Mod Version

REXTOR DIGITAL ADJUSTABLE CDI

For Yamaha T135 Sniper Jupiter MX Spark 135LC Exciter

PRODUCT DESCRIPTION

The Rextor CDI has the advantages value comparing to the stock CDI or even with other after market brand. This CDI has been equipped with the Fan sensor and TPS sensor that bring “optimum performance” and “engine ability” at the same time. The fan sensor will inform the rider if there is any faulty in cooling system (the fan) of the motorbike. And the TPS sensor gives the correct ignition timing in any different load and condition. Equipped with the standard connector makes this CDI so easy to install just “Plug n Play”.

FIRST INITIALIZATION

Every start up of the motor bike, the CDI has routine tasks to check the Fan sensor and TPS sensor is in working condition.
The fan will turn on for about 4 seconds to ensure the CDI is in perfect working condition.
And the CDI will detect the position of the TPS sensor as well.

The connector side Rextor CDI for T135

FEATURES

1. TPS (Throttle Position Sensor) Indicator
   The Rextor CDI has the ability to detect the origin of TPS position (manufacturer specs.) Thus it can be a reference for tuning the motorbike to get the optimum performance. The Green LED will light on during origin position (closed throttle).
2. PPA (Pulser Position Adjuster) Indicator
   This feature makes adjustment of the ignition curve very easy to be done. The Red LED will light on as an indication of origin or stock ignition curve.
3. Early Warning System
   The Rextor CDI will inform to the rider if there is any faulty on temperature sensor (fan). The temperature indicator in the dashboard will start to blinking, so it will gives warning to avoid any further damage.
4. Multi Map Control System (3D Map)
   There are 30 maps (ignition curve) which simultaneously used and controlled by the TPS to drives the optimum performance in any different engine load and condition.

Installation

The Rextor CDI has equipped with the standard connector, so the installation process is very
simple and fast just replace the stock CDI with the Rextor CDI.

Setting the Throttle Position Sensor (TPS)

TPS Located on the carburetor

1. Make sure Throttle/Accelerator is in fully close condition.

Green LED ON

2. Loosen the screw on the TPS so it can be move left and right.

3. Slowly move the TPS either left or right until the Green LED will light on.

4. The Green LED will light on means the TPS is in the correct setting.

5. Once green LED lights on, Tighten the screw.

6. The TPS is now on correct position (manufacturer spec).

Setting the Pulser Position Adjuster (PPA)

Setting the Ignition timing adjustment using PPA (Pulser Position Adjuster) while the engine running

Red LED ON

1. The Red LED will light on to indicate the origin or stock ignition curve.

2. To Advance the ignition timing, turn the switch to the Left (CCW Counter Clock Wise). The maximum value is 4 degree.

3. To Retard the ignition timing, turn the switch to the Right (CW : Clock Wise). The maximum value is 4 degree.

The optimum ignition timing will vary depend on the engine load, engine modification (porting, muffler, jetting, bigger carb etc.) and riding style.

The easiest way is using Dyno test to measure the performance or ride test to define the ignition timing.

Technical Specification
1. Working load (battery) : 10 ~ 23 volt
2. Current Consumption : 0.35 ampere
3. Output Voltage : 270 volt
4. Microprocessor : Motorola 24 MHz MC908QY4A-MPE
5. Ignition Accuration : 0.001 degree

Yamaha 135LC History

The Yamaha Y135LC debuted in 2005 for Thai and Indonesian market before brought in Malaysian market in February 2006. The Y135LC was designed by the headquarters of Yamaha Motor Company in Japan for Asean market. The model was very successful in Southeast Asia especially in Malaysia.

To promote the Y135LC, Yamaha organized an Asean road tour known as the Yamaha Pan Asean Tour, traveling 9,000 km on roads in Thailand, Malaysia, Singapore and Philippines, which ended on May 2006. For your information, it have their own named, different due to their country. The Yamaha Spark 135i, or Yamaha T135 as the experts call the motorcycle. To be honest the Yamaha Spark 135 has many names in the Philippines the Spark is known as the Yamaha Sniper and in Indonesia as the Yamaha Jupiter MX and some parts of the world the Yamaha Spark 135i is known by the simple name of just Yamaha 135LC.

Yamaha 135LC (Malaysia Version)

Yamaha 135LC Limited Edition (Malaysia Version)