Frame - Inspection And Repair; Footrests, Brake Pedal And Gearchange Lever - Removal And Installation - Yamaha TDM850 User Manual

UNREGISTERED VI
3.1a Note how the spring end (arrowed) locates
1 General information
TDM models use a twin spar box-section
aluminium frame which uses the engine as a
stressed member.
TRX models use a trellis-type steel tube frame
which uses the engine as a stressed member.
XTZ models use a cradle-type steel frame.
Front suspension is by a pair of oil-damped
telescopic forks. On XTZ models, the forks have
a conventional damper system, while TDM and
TRX models have a cartridge damper. On TDM
and TRX models the forks are adjustable for pre-
load and rebound damping.
At the rear, an aluminium swingarm acts on a
single shock absorber, on TRX and XTZ models
via a three-way linkage. The shock absorber is
adjustable for spring pre-load on all models, for
rebound damping on TDM models, and for both
rebound and compression damping on TRX
models. On TRX models, the shock absorber has
a remote reservoir.
The drive to the rear wheel is by chain.

2 Frame - inspection and repair

1 The frame should not require attention unless
accident damage has occurred. In most cases,
frame renewal is the only satisfactory remedy for
such damage. A few frame specialists have the
jigs and other equipment
straightening the frame to the required standard
of accuracy, but even then there is no simple way
of assessing to what extent the frame may have
been over stressed.
2 After the machine has accumulated a lot of
miles, the frame should be examined closely
UNREGISTERED VI
for signs of cracking or splitting at the welded
joints. Loose engine mount bolts can cause
ovaling or fracturing of the mounting tabs. Minor
damage can often be repaired by welding,
depending on the extent and nature of the
damage. This is, however, a job for a frame
specialist, especially where an aluminium frame
is concerned. 3 Remember that a frame which is
out of alignment will cause handling problems. If
misalignment is suspected as the result of an
accident, it will be necessary to strip the machine
completely so the frame can be thoroughly
checked.
Footrests, brake pedal and
gearchange lever -
removal and installation
Footrests
Removal - front footrests
1 On TDM models, remove the rubber cap from
the back of the footrest bracket, then unscrew
the nut and separate the footrest from the
bracket, noting how the return spring end locates
in the bracket (see illustration). For easier
access to the nut, first unscrew the
necessary for
3.3 Remove the split pin (A) and withdraw
the pivot pin, noting now the spring ends
Frame, suspension and final drive 6»3
3.1b Footrest bracket bolts (A), footrest rubber screws (B)
two bolts securing the bracket and remove it
(see illustration). The footrest rubber can be
renewed by removing the two screws that secure
it to the footrest.
2 On TRX models, unscrew the nut from the
back of the footrest bracket and separate the peg
from the bracket. The footrest rubber can be
renewed by removing the two screws that secure
it to the footrest. For easier access to the nut,
first remove the brake pedal or gearchange lever
{see below), then unscrew the bolts securing the
footrest bracket and displace it.
3 On XTZ models, remove the split pin and
washer (where fitted) from the bottom of the
footrest pivot pin, then withdraw the pivot pin and
remove the footrest (see illustration). Note the
fitting of the return spring. The footrest rubber
can be renewed by removing the two bolts that
secure it to the peg. Removal - rear footrests
4 On 1991 to 1995 TDM models, remove the
split pin from the bottom of the footrest pivot pin,
then withdraw the pivot pin and remove the
footrest (see illustration). Note the fitting of the
detent plate, ball and spring, and take care that
they do not spring out when removing the
footrest. Also note the collar for the pivot pin. The
footrest rubber can be
3.4 Remove the split pin (A) and withdraw
locate (B)
UNREGISTERED VERSION OF PICTURED
the pivot pin, noting how the detent plate
and ball fit (B)
Staned by Stalker
UNREGISTERED VI
6