engine YAMAHA T105 1998 User Guide

EAE80300EAE80000
Fuel
Make sure there is sufficient fuel in the
tank.EUU61000wDo not overfill the fuel tank. Avoid spilling
fuel on the hot engine. Do not fill the fuel
tank above the bottom of the filler tube as
shown in the illustration or it may over-
flow when the fuel heats up later and ex-
pands.EUU39302cCAlways wipe off spilled fuel immediately
with a dry and clean soft cloth. Fuel may
deteriorate painted surfaces or plastic
parts.
24
1. Filler tube 2. Fuel level
Recommended fuel: Regular gasoline
Fuel tank capacity:
Total:
4.5 L
Reserve:
1.4 L
T105(E) O/M-2 9/11/01 11:17 AM Page 24 (1,1)

EAE40104*Engine oil
Make sure the engine oil is at the specified
level. Fill with oil as necessary (see page 41
for details).
25
1Oil level gauge2Upper level3Lower level
Recommended oil:
Yamalube 4 (20W40) or equivalent
SAE 20W40 type SE motor oil
Oil quantity:
Total amount:
1.0 L
Periodic oil change:
0.8 L
T105(E) O/M-2 9/11/01 11:17 AM Page 25 (1,1)

EAF00000
OPERATION AND
IMPORTANT RIDING
POINTS
EAF18800*Starting and warming up a cold engine
1. Turn the main switch to ON”.
2. Shift transmission into neutral.EUU03000NOTE:
When the transmission is in neutral, the
neutral indicator light (green) should be
on. If the light does not come on, ask a
Yamaha dealer to inspect it.
28
N. Neutral
T105(E) O/M-2 9/11/01 11:17 AM Page 28 (1,1)

3. Fully open the starter lever “1”, and
completely close the throttle grip.
4. Start the engine by pushing the starter
switch or by kicking the kick starter.EUU03401NOTE:
If the engine fails to start, release the
starter switch, wait a few seconds, then try
again. Each attempt should be as short as
possible to preserve the battery. Do not
crank the engine more than 10 seconds on
any one attempt. If the engine does not
start with the starter motor, kick the kick
starter to start the engine.5. After starting the engine, move the
starter lever to warmming up position
(about halfway).
29
T105(E) O/M-2 9/11/01 11:17 AM Page 29 (1,1)

EUU02600NOTE:
For maximum engine life, always warm up
the engine before starting off. Never accel-
erate hard with a cold engine!6. After warming up the engine, turn off
the starter completely.EUU02700NOTE:
The engine is warm when it responds nor-
mally to the throttle with the starter turned
off.EAF10802*Starting a warm engine
The starter lever “1” is not required when
the engine is warm.cCMake sure the starter is turned off before
starting a warm engine.
30
T105(E) O/M-2 9/11/01 11:17 AM Page 30 (1,1)

Shifting
The transmission lets you control the
amount of power you have available at a
given speed for starting, accelerating,
climbing hills, etc. The use of the shift
pedal is shown in the illustration.
To start out and accelerate
1. Close the throttle completery.cCAlways close the throttle while shifting
gears. Otherwise, damage to the engine
and drive train can result.2. Shift into FIRST gear.
3. Open the throttle gradually.
31
1Shift pedal N. Neutral
T105(E) O/M-2 9/11/01 11:17 AM Page 31 (1,1)

EAF30000*Engine break-in
There is never a more important period in
the life of your motorcycle than the period
between zero and 1,000 km. Because the
engine is brand new, prolonged full throttle
operation, or any condition which might
result in excessive heating of the engine
must be avoided during this period.EAF308001. 0~150 km:
Avoid prolonged operation above 1/3
throttle. Vary the speed of the motor-
cycle from time to time. Do not oper-
ate it at one set throttle position.
2. 150~500 km:
Avoid prolonged operation above 1/2
throttle. Rev the engine freely through
the gears, but do not use full throttle
at any time.
34
0~500Km
1/21/3
0~150Km
T105(E) O/M-2 9/11/01 11:17 AM Page 34 (1,1)

3. 500~1,000 km:
Avoid cruising speeds in excess of 3/4
throttle.EUU40400cCAfter 1,000 km of operation, be sure to re-
place the engine oil.4. 1,000 km and beyond:
Avoid prolonged full-throttle opera-
tion. Vary speed occasionally.EUU32200cCIf any engine trouble should occur during
the break-in period, consult a Yamaha
dealer immediately.
35
500~1000Km
3/4
1000Km~
T105(E) O/M-2 9/11/01 11:17 AM Page 35 (1,1)

39
* Valve(s)Check valve clearance. Adjust if necessary.2222Spark plug Check condition. Clean or replace if necessary.2222Air filterClean. Replace if necessary.22
* CarburetorCheck idle speed/stater operation.
2222
Adjust if necessary.
*
Fuel lineCheck fuel hose and vacuum pipe for cracks or
22damage. Replace if necessary.
Engine oilReplace (Warm engine before draining).22EVERY 2,000 km* Engine oil filterCheck/clean/replace if necessary2222BrakeCheck operation/Adjust if necessay22
Check rear arm assembly for looseness.
* Rear arm pivotCorrect if necessary. Moderately repack every.2
16,000 km***
* WheelsCheck balance/damage/runout/spoke tightness.
22Replace if necessary.
* Wheel bearingsCheck bearing assembly for looseness/damage.
22 2
Replace if damaged.
INITIAL EVERY
ITEM REMARKS
500 km 2,000 km 4,000 km 8,000 km
PERIODIC MAINTENANCE/LUBRICATION
T105(E) O/M-2 9/11/01 11:17 AM Page 39 (1,1)

EAH48201*Engine oil
1. Oil level measurement
a. Place the motorcycle on the center-
stand. Warm up the engine for several
minutes.EUU03901NOTE:
Be sure the motorcycle is positioned
straight up when checking the oil level. A
slight tilt toward the side can result in false
readings.b. With the engine stopped, wait a few
minutes and then remove the oil level
gauge.
c. Wipe the oil level gauge off with a
clean rag and insert it in the filler hole
without screwing it in.
41
1Oil level gauge2Upper level3Lower level
T105(E) O/M-2 9/11/01 11:17 AM Page 41 (1,1)