MV Agusta 2008 F4 312RR 1078, Workshop Manual

Page: 78 / 124

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Crankcase
D
Gear group revision
In order to carry out the following procedure the follow-
ing special tool is necessary:
Motor simulation utensil n° 8A0094792
Disassemble the gear group from the motor and
reassemble it on the special utensil n° 8A0094792
motor simulator being careful to tighten the pinion fix-
ing nuts with the separator that simulates the clutch
hub.
Check the condition of the front clutching teeth of the
gears which must be in perfect shape and sharp
edged. The neutral gears must rotate freely on their
shafts.
All of the neutral gears must present a minimum axial
play of 0,10 mm.
Verify the wear on the bearings present on the inside
of the gear box.Verify the control quotas indicated on
the sketch in the figure.
Gear selection forks
Visually inspect the gear selection forks to look for
folds or other damage.
Every fork that appears damaged must be substituted
because it can cause difficulty when inserting a gear
and causes sudden uncoupling under load. Check the
play of each fork using a thick meter in the groove of its
gear. I play is above 0,7 mm substitute the gear or fork
in relation to service limit of each part.
Gear groove limit 5,6 mm Primary
4,6 mm Secondary
Limite forcelle 4,65 mm Primary 5-6 gear
3,65 mm Secondary 1-2, 3-4 gear
The fork must be able to move without force.
Grippage of the gears must flow without impediments
and without excessive attritions.
8A0094792
WITH 5 ENGAGED
WITH 6 ENGAGED
WITH 2 ENGAGED
WITH 3 ENGAGED
WITH 4 ENGAGED
WITH 1 ENGAGED