Page 15 of 96

INSTRUMENT AND CONTROL FUNCTIONS
220 200 180 160 140 120
100
80
60
40
20
km/h345
6
7
2
1
0
N
34 512EAU01590
F(Parking)
The steering is locked, and the taillight and
auxiliary light are on, but all other electrical
systems are off. The key can be removed.
The steering must be locked before the
key can be turned to “
F”.
ECA00043
Do not use the parking position for an
extended length of time, otherwise the
battery may discharge.
CAUTION:
EAU03034
Indicator and warning lights
EAUB0001
Oil level warning light “v”
This warning light comes on when the en-
gine oil level is low.
The electrical circuit of the warning light
can be checked according to the following
procedure.
1. Turn the key to “
I” (ON). The warn-
ing light should come on for a few
seconds.
1. Oil level warning light “v”
2. Turn signal indicator light “y
y”
3. Neutral indicator light “N”
4. High beam indicator light “
1”
5. Fuel level warning light “K”
2. If the warning light does not come on,
have a Yamaha dealer check the
electrical circuit.
NOTE:
Even if the oil level is sufficient, the warn-
ing light may flicker when riding on a slope
or during sudden acceleration or decelera-
tion, but this is not a malfunction.
NOTE:
This model is equipped with a self-diagno-
sis device for the oil level warning light cir-
cuit. (See page 3-6 for an explanation of
the self-diagnosis device).
EAU00057
Turn signal indicator light “y
y”
This indicator light flashes when the turn
signal switch is pushed to the left or right.
EAU00061
Neutral indicator light “N”
This indicator light comes on when the
transmission is in the neutral position.
3-2
3
EAU00027 
     
        
        Page 37 of 96

OPERATION AND IMPORTANT RIDING POINTS
EAU00373WARNING0
•Become thoroughly familiar with
all operating controls and their
functions before riding. Consult a
Yamaha dealer regarding any con-
trol or function that you do not
thoroughly understand.
•Never start the engine or operate it
in a closed area for any length of
time. Exhaust fumes are poiso-
nous, and inhaling them can cause
loss of consciousness and death
within a short time. Always make
sure that there is adequate ventila-
tion.
•Before starting out, make sure that
the sidestand is up. If the side-
stand is not raised completely, it
could contact the ground and dis-
tract the operator, resulting in a
possible loss of control.
EAU03818
Starting the engine
In order for the ignition circuit cut-off sys-
tem to enable starting, one of the following
conditions must be met:
•The transmission is in the neutral po-
sition.
•The transmission is in gear with the
clutch lever pulled and the sidestand
up.
EW000054WARNING0
•Before starting the engine, check
the function of the ignition circuit
cut-off system according to the
procedure described on page 3-18.
•Never ride with the sidestand
down.
1. Turn the key to “I” (ON) and make
sure that the engine stop switch is set
to “
I”.
EC000035
If the fuel level warning light comes on,
check the fuel level, and, if necessary,
refuel as soon as possible.
2. Shift the transmission into the neutral
position.
When the transmission is in the neu-
tral position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical
circuit.
3. Turn the starter (choke) on and com-
pletely close the throttle. (See page
3-12 for starter (choke) operation).
CAUTION:
5-1
5
EAU00372   
     
        
        Page 40 of 96

OPERATION AND IMPORTANT RIDING POINTS
EAU00424
Tips for reducing fuel 
consumption
Fuel consumption depends largely on your
riding style. Consider the following tips to
reduce fuel consumption:
•Thoroughly warm up the engine.
•Turn the starter (choke) off as soon
as possible.
•Shift up swiftly, and avoid high engine
speeds during acceleration.
•Do not rev the engine while shifting
down, and avoid high engine speeds
with no load on the engine.
•Turn the engine off instead of letting it
idle for an extended length of time
(e.g., in traffic jams, at traffic lights or
at railroad crossings).
5-4
5
EAU00372
EAU01128
Engine break-in
There is never a more important period in
the life of your engine than the period be-
tween 0 and 1,600 km (1,000 mi). For this
reason, you should read the following ma-
terial carefully.
Since the engine is brand new, do not put
an excessive load on it for the first 1,600
km (1,000 mi). The various parts in the en-
gine wear and polish themselves to the
correct operating clearances. During this
period, prolonged full-throttle operation or
any condition that might result in engine
overheating must be avoided.
EAU01171
0-1,000 km (0-600 mi)
Avoid prolonged operation above 1/3 throt-
tle.
1,000-1,600 km (600-1,000 mi)
Avoid prolonged operation above 1/2 throt-
tle.
EC000056
After 1,000 km (600 mi) of operation,
the engine oil and final gear oil must be
changed, and the oil filter cartridge/ele-
ment replaced.
1,600 km (1,000 mi) and beyond
The vehicle can now be operated normal-
ly.
EC000049
If any engine trouble should occur dur-
ing the engine break-in period, immedi-
ately have a Yamaha dealer check the
vehicle.
CAUTION:
CAUTION: 
     
        
        Page 86 of 96

SPECIFICATIONSEAU01038
8-1
8
Specifications
ModelBT1100
Dimensions
Overall length 2,200 mm
Overall width 800 mm
Overall height 1,140 mm
Seat height 812 mm
Wheelbase 1,530 mm
Ground clearance 168 mm
Minimum turning radius 2,980 mm
Basic weight  
(with oil and full fuel tank)250.5 kg
Engine
Engine type  Air-cooled 4-stroke, 
SOHC
Cylinder arrangement  V type 2-cylinder
Displacement 1,063 cm
3
Bore x stroke 95.0 x 75.0 mm
Compression ratio 8.3 : 1
Starting system  Electric starter
Lubrication system  Wet sumpEngine oil
Ty p e
Recommended  API Service SE, SF, SG or
engine oil classification  higher
Be sure to use motor oils that do not contain anti-friction modifiers.
Passenger car motor oils (often labeled “ENERGY CONSERVING II”)
contain anti-friction additives which will cause clutch and/ or starter
clutch slippage, resulting in reduced component life and poor
engine performance.8
Quantity
Without oil filter  
cartridge replacement 3.0 L
With oil filter cartridge 
replacement 3.1 L
Total amount
(dry engine) 3.6 L
CAUTION:
-20-10 0 1020304050°C
SAE 10W-30
SAE 10W-40
SAE 20W-40
SAE 15W-50
SAE 15W-40