Suzuki GSF1250 Service Manual page 47

4) Count out 21 pins (20 pitches) on the chain and
measure the distance between the two points. If the
distance exceeds the service limit, the chain must be
replaced.
Drive chain 20-pitch length
Service limit: 319.4 mm (12.57 in)
1 2 3
5) After finishing the drive chain length inspection,
adjust the drive chain slack.
Drive Chain Slack Adjustment
1) Place the motorcycle on its center stand for fine
adjustment.
2) Loosen the axle nut (1).
3) Loosen the chain adjuster lock-nuts (2).
4) Loosen or tighten both chain adjuster bolts (3) until
there is 20 – 30 mm (0.8 – 1.2 in) "a" of slack at the
middle of the chain between the engine and rear
sprockets as shown.
CAUTION
!
The reference marks "A" on both sides of the
swingarm and the edge of each chain
adjuster must be aligned to ensure that the
front and rear wheels are correctly aligned.
Drive chain slack "a"
Standard 20 – 30 mm (0.8 – 1.2 in)
2
"A"
3
1
"a"
19 20 21
I649G1020034-02
2
"A"
3
I718H1020037-02
I649G1020036-02
Maintenance and Lubrication:
5) After adjusting the drive chain, tighten the axle nut
(1) to the specified torque.
Tightening torque
Rear axle nut: 100 N·m (10.0 kgf-m, 72.5 lb-ft)
6) Tighten both chain adjuster lock-nuts (2) securely.
7) Recheck the drive chain slack after tightening the
axle nut.
Drive Chain Cleaning and Lubricating
Clean and lubricate drive chain
Every 1 000 km (600 miles)
Clean and lubricate the drive chain in the following
procedures:
1) Clean the drive chain with kerosine. If the drive chain
tends to rust quickly, the intervals must be
shortened.
CAUTION
!
Do not use trichloroethylene, gasoline or any
similar solvent.
These fluids have too great a dissolving
power for this chain and they can damage the
O-rings. Use only kerosine to clean the drive
chain.
2) After cleaning and drying the chain, oil it with a
heavyweight motor oil.
CAUTION
!
• Do not use any oil sold commercially as
"drive chain oil". Such oil can damage the
O-rings.
• The standard drive chain is a RK
GB50GSVZ3. SUZUKI recommends to use
this standard drive chain as a replacement.
0B-16
B718H10206018
I718H1020038-01