Clutch Setting Data - Yamaha BR250F Service Manual

Engine rpm
t
Clutch
shifting rpm
Clutch
engagement rpm
Good condition
Clutch shifting rpm
Clutch engagement rpm
t
Engine rpm
Bad condition
, _ _ Travelled distance
Starting position 200""" 300 m (650""" 1,000 ft)
A. Clutch Setting Data
1---------+---4 Travelled distance
-----
Starting position 200'"'-' 300 m (650""" 1,000
tt)
S.T.D. spec. High altitude spec.
Engagement r.p.m.
3100 ± 200 +-
Shifting
r.p.m, 5750 ± 50 +-
Parts No. 90501·50654 +-
Set weight 15 kg (33Ib) +-
Primary spring
2.4 kg/mm (134 lb/in) Spring constant +-
Color None
+-
Q'ty 8 p.c.s./unit +-
Roller shim
Parts No.
90201~06727 +-
Twist angle 160
0
+-
Secondary spring
Color None +-
NOTE.·~
_
High altitude specifications apply to operation at an altitude of more than 1506 meters (4500 tt),
Since the clutch weights are secured in place
by the sheave cap bolts, the centrifugal force
that can alter clutch characteristics comes
from the weight of the lever on the spider. To
adjust clutch engagement and clutch shifting
rpm, add or remove roller shims from the
spider as indicated by the chart .
.Clutch shifting rpm can also be adjusted by
changing the preload on the secondary sheave
spring: 160
0
and 280
0
•
160
0
is standard.
4-2