Pulsar DTS-i 180 UG III Training Manual Download Page 24

Page: 24 / 32

Dealer Development Center

Pulsar DTS-i UG-III-180cc

Training Notes

Pulsar DTS-i UG-III-180cc

Training Notes

Do’s

Don’ts

•

Use appropriate screw

drivers.

Handling

Cleaning

• For cleaning always use

carburettor cleaner like

Acetone

Carbon Tetra chloride

Aerosol

CVC spray

Maintenance

Ensure

•

Jets

Holes are clean.

Holes are not worn out.

Size as per specification.

•

Float is in good condition.

•

Float Pin

Tip having no wear mark.

Spring loaded pin is free

in movement.

•

Needle Jet

No wear at taper portion.

Circlip position is in

specified groove.

•

Piston valve

No wear mark.

Diaphragm condition.

• Never use oversize screw

drivers.

• Do not over tighten the jets

and screws.

• These will damage the jets

and their seats.

• Never clean the carburettor

with water.

•

Jets & air passages will get
clogged due to sediments if
cleaned by water.

Replace

•

Jets

Worn out jet.

Incorrect size jet.

Punctured, Squeezed and

distorted float.

Worn out tip.

If spring loaded pin is

sticky.

Needle worn out at taper

portion.

Piston valve worn out.
Scoring marks.

Diaphragm punctured.

Overhaul carburettor at every 10,000 kms. and insepct the parts.

Pulsar DTSi is the first bike in the world (In small cc engine) to have twin spark ignition system.

1. The most obvious feature is the Twin Spark Plug configuration o f

the Engine. The cylinder head has 2 spark plugs one on either

side. The spark plugs are of the smae Heat range (Champion

RG4HC/Bosh UR3DC (Resistive) and have similar electrode gaps.

These also spark simultaneuosly, This has been done to improve

the combustion process by reducing the time of combustion.

The end results are low emissions, good fuel economy and good

driveability

2. To enable the sparking of the 2 spark plugs, a intelligent CDI

capable of handling this was developed. Further more, the

ignition timing has been optimised to give the best output from

engine (10 BTDC @ 1500 rpm, 28 BTDC @ 3500 rpm). To

enable optimum igntion timing for part throttle loads and full

throttle loads, there are separate igntion maps stored in the

memory of the CDI. These are activated depending on the

throttle opening and engine speed. The Digital CDI has a bit

Microprocessor which handles all these inputs and gives out the

required and correct spark advance. The intelligent CDI can be

easily indentified by 2 green dots marked on CDI case.

3. To enable switching the required igntion maps, a magnetically

operated need switch is incorporated on the carburettor throttle

shaft and carburettor body. This is known as TRICS. Throttle

Responsive Igntion Control System.

4. These engines are capable of of reviving very high, quite easily.

To keep them mechanically safe, a engine rpm limiter has been
incorporated in the Digital CDI. This curtails the sparks to the
spark plugs thereby limiting the engine rpm Max upto 9000 and
thus keeps the engine mechanically safe. There are 2 spark
plugs. LH spark plug fires at 350 rpm and then continues to
give spark till at 9000 rpm of engine. The spark is cut off from
LH plug 9000 rpm to protect engine from excessively high
speed.
RH spark plug gives spark at 750 rpm and then continues to
give till 6000 rpm of engine. If engine rpm exceeds 6000 rpm
then RH plug is cut off. This is done to reduce combustion
noise created in engine.

5. This engine has been extensively tuned for more Power and

Torque.

6. The DTSi technology has enabled the Pulsar to meet 2006

norms without any Secondary air injection devices.

Troubleshooting :

•

Malfunctioning of the Reed switch assly will not harm the engine, neither it will give any physical
indicators like starting trouble or misfiring.

However checking of proper functioning of Reed Switch Assly at PDI and at every service

is essential.

•

Following symptoms may indicate as malfunctioning of

Reed Switch Assly