Page 55 of 99
PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
65. Install the drain bolts and tighten
them to the specified torque.
6. Install the new oil filter, O-rings
and the filter cover. Tighten the oil
filter cover bolts to the specified
torque.
NOTE:@ Make sure the O-rings are seated prop-
erly. @7. Fill engine with oil. Install the oil fill-
er cap and tighten.
EC000066
CAUTION:@ l
Do not put in any chemical addi-
tives. Engine oil also lubricates
the clutch and additives could
cause clutch slippage.
l
Be sure no foreign material en-
ters the crankcase.
@
1. Engine oil drain bolt b
2. Oil filter cover bolt (´ 5)
3. Oil filter coverTightening torque:
Drain bolt
a:
35 Nm (3.5 m·kg)
Drain bolt
b:
30 Nm (3.0 m·kg)
1. Oil filter
2. O-ring (´ 2)
Tightening torque:
Oil filter cover bolt:
10 Nm (1.0 m·kg)
Recommended oil:
See page 8-1.
Oil quantity:
Total amount:
4.2 L
Periodic oil change:
3.5 L
With oil filter replacement:
3.6 L
E_4tx_Periodic.fm Page 9 Saturday, October 16, 1999 9:37 AM
Page 68 of 99

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
EAU00731
Inspecting the brake fluid
levelInsufficient brake fluid may let air enter
the brake system, possibly causing the
brakes to become ineffective.
Before riding, check that the brake fluid
is above the minimum level and replen-
ish when necessary.
Observe these precautions:
l
When checking the fluid level,
make sure the top of the master
cylinder is level by turning the han-
dlebars.
l
Use only the designated quality
brake fluid. Otherwise, the rubber
seals may deteriorate, causing
leakage and poor brake perfor-
mance.
l
Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor brake performance.
l
Be careful that water does not en-
ter the master cylinder when refill-
ing. Water will significantly lower
the boiling point of the fluid and
may result in vapor lock.
l
Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.
l
Have a Yamaha dealer check the
cause if the brake fluid level goes
down.
1. Minimum level markFront
1. Minimum level markRecommended brake fluid: DOT 4Rear
E_4tx_Periodic.fm Page 22 Saturday, October 16, 1999 9:37 AM
Page 70 of 99

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
6
EC000096
CAUTION:@ Too little chain slack will overload
the engine and other vital parts.
Keep the slack within the specified
limits. @3. After adjusting, tighten the axle nut
and caliper bracket bolt to the
specified torque.
EAU03006
Drive chain lubricationThe chain consists of many parts which
work with each other. If the chain is not
maintained properly, it will wear out
quickly. Therefore, the chain must be
serviced regularly. This service is es-
pecially necessary when riding in dusty
areas. This motorcycle is equipped
with a sealed type chain. Steam clean-
ing, high-pressure washers, and sol-
vents can damage the drive chain, so
do not use these for cleaning it. Use
only kerosene to clean the drive chain.
Wipe it dry, and thoroughly lubricate it
with SAE 30 ~ 50W motor oil. Do not
use any other lubricants on the drive
chain. They may contain solvents that
could damage the sealed chain.
EC000097
CAUTION:@ Be sure to oil the chain after wash-
ing the motorcycle or riding in the
rain. @
EAU02962
Cable inspection and
lubrication
EW000112
WARNING
@ Damage to the outer housing of ca-
bles may lead to internal rusting and
interfere with the cable movement.
Replace damaged cables as soon as
possible to prevent unsafe condi-
tions. @Lubricate the cables and cable ends. If
a cable does not operate smoothly, ask
a Yamaha dealer to replace it.
1. Caliper bracket bolt
Tightening torque:
Axle nut:
110 Nm (11.0 m·kg)
Caliper bracket bolt:
35 Nm (3.5 m·kg)
Recommended lubricant:
Engine oil
E_4tx_Periodic.fm Page 24 Saturday, October 16, 1999 9:37 AM
Page 71 of 99
PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
EAU00773
Throttle cable and grip
lubricationThe throttle twist grip assembly should
be greased at the time that the cable is
lubricated, since the grip must be re-
moved to get at the end of the throttle
cable. After removing the screws, hold
the end of the cable up in the air and
put in several drops of lubricant. With
the throttle grip disassembled, coat the
metal surface of the grip assembly with
a suitable all-purpose grease.
EAU02984
Brake and shift pedal
lubricationLubricate the pivoting parts.
EAU02985
Brake and clutch lever
lubricationLubricate the pivoting parts.
Recommended lubricant:
Engine oil
Recommended lubricant:
Engine oil
E_4tx_Periodic.fm Page 25 Saturday, October 16, 1999 9:37 AM
Page 72 of 99
PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
6
EAU02986
Sidestand lubricationLubricate the sidestand pivoting point
and metal-to-metal contact surfaces.
Check that the sidestand moves up
and down smoothly.
EW000113
WARNING
@ If the sidestand does not move
smoothly, consult a Yamaha dealer. @
EAU00790
Rear suspension lubricationLubricate the pivoting parts.
Recommended lubricant:
Engine oilRecommended lubricant:
Molybdenum disulfide grease
E_4tx_Periodic.fm Page 26 Saturday, October 16, 1999 9:37 AM
Page 83 of 99

7-1
7
EAU01517
7-MOTORCYCLE CARE AND STORAGECareThe exposure of its technology makes a
motorcycle charming but also vulnera-
ble. Although high-quality components
are used, they are not all rust-resistant.
While a rusty exhaust pipe may remain
unnoticed on a car, it does look unat-
tractive on a motorcycle. Frequent and
proper care, however, will keep your
motorcycle looking good, extend its life
and maintain its performance. More-
over, the warranty states that the vehi-
cle must be properly taken care of. For
all these reasons, it is recommended
that you observe the following cleaning
and storing precautions.Before cleaning
1. Cover up the muffler outlets with
plastic bags.
2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug caps, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-
ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and
degreaser off with water.Cleaning
After normal use
Remove dirt with warm water, a neutral
detergent and a soft clean sponge,
then rinse with plenty of clean water.
Use a tooth or bottle brush for hard-to-
reach parts. Tougher dirt and insects
will come off more easily if the area is
covered with a wet cloth for a few min-
utes before cleaning.
E_4tx_Cleaning.fm Page 1 Saturday, October 16, 1999 9:38 AM
Page 89 of 99

8-1
8
EAU01038
8-SPECIFICATIONSSpecifications
Model TDM850
Dimensions
Overall length 2,165 mm
(for GB, NL, B, F, E, P, I, GR, D,
DK)
2,200 mm (for N, S, SF)
Overall width 790 mm
Overall height 1,285 mm
Seat height 805 mm
Wheelbase 1,475 mm
Ground clearance 165 mm
Minimum turning radius 2,900 mm
Basic weight (with oil and full
fuel tank)
232 kg
Engine
Engine type Liquid cooled 4-stroke, DOHC
Cylinder arrangement Forward inclined parallel
2-cylinder
Displacement 849 cm
3
Bore ´ Stroke 89.5 ´ 67.5 mm
Compression ratio 10.5:1
Starting system Electric starter
Lubrication system Dry sumpEngine oil
Ty p e
Recommended engine oil
classification API Service SE, SF, SG type or
higher
Quantity
Periodic oil change 3.5 L
With oil filter replacement 3.6 L
Total amount 4.2 L
Cooling system capacity
(total amount)
1.7 L
-20˚ -10˚ 0˚
10˚20˚ 30˚
40˚50˚C
SAE 10W/30
SAE 15W/40SAE 20W/40SAE 20W/50
SAE 10W/40
CAUTION:Be sure to use motor oils that do not contain anti-friction
modifiers. Passenger car motor oils (often labeled
“Energy Conserving”) contain anti-friction additives which
will cause clutch and/or starter clutch slippage, resulting in
reduced component life and poor engine performance.
E_4tx_Spec.fm Page 1 Saturday, October 16, 1999 9:38 AM