Yamaha TZ250M1 Owner's Service Manual page 140

PRIMARY DRIVEN GEAR, PRIMARY DRIVE GEAR
AND BALANCER SHAFT
3. Install:
• Balancer weight gear 1
NOTE:
Align the punch mark a on the balancer shaft
with the hole b of the balancer weight gear.
4. Install:
• Balancer drive gear 1
NOTE:
Align the punch marks, a (balancer drive
gear) with b (crankshaft) and c (balancer
drive gear) with d (balancer weight gear) as
shown.
5. Install:
• Lock washer 1N
• Nut (balancer weight gear) 2
• Primary drive gear 3
• Plain washer 4
• Bolt (primary drive gear) 5
NOTE:
Install the plain washer with its chamfered por-
tion a toward you.
6. Tighten:
• Nut (balancer weight gear) 1
NOTE:
Place an aluminum plate a between the teeth
of the balancer drive gear 2 and balancer
weight gear 3.
7. Bend the lock washer 1 tab.
4-42
ENG
50 Nm (5.0 mdkg, 36 ftdlb)
T