c. Make sure each exhaust pipe is correctly
seated in the exhaust port or exhaust mani-
fold.
d. Loosely install the entire exhaust system and
finger-tighten the hardware.
e. First, torque the exhaust pipe-to-cylinder
head nuts (B,
Figure 110
) and the exhaust
manifold bolts (
Figure 108
) to 20 N•m (15
ft-lb.).
f.
Then, torque the muffler clamp screws (A,
Figure 107
) to 20 N•m (15 ft.-lb.).
g. Then, torque the muffler hanger bolts (B,
Fig-
ure 107
) to 25 N•m (18 ft.-lb.).
h. After installation is complete, start the engine
and make sure there are no exhaust leaks.
Correct any leak prior to riding the bike.
Inspection
The exhaust system is vital to the motorcycle’s
operation and performance. Periodically inspect the
exhaust system.
Replace parts that have excessive dents that cause
flow restrictions.
To prevent internal rust buildup, periodically re-
move the drain bolt from each muffler to drain away
trapped moisture.
1. Check for leaks where each muffler joins an ex-
haust pipe (A,
Figure 112
).
2. Inspect the drain bolts for corrosion or exhaust
leaks. Replace the bolts and washers if necessary.
3. Inspect the muffler mounting brackets (B,
Fig-
ure 112
) for wear or damage. Replace the muffler as
necessary.
AIR/FUEL, EXHAUST AND EMISSION CONTROL SYSTEMS
239
8
112
Table 1 CARBURETOR SPECIFICATIONS
Carburetor type
Mikuni BSR37
Carburetor identification number
USA and Canadian models
5EL5 20
California models
5EL6 30
Europe and Australia models
5EL1 00
Main jet
Carburetor No. 1
No. 110
Carburetor No. 2
No. 112.5
Main air jet
No. 55
Needle jet
P-0M
Jet needle
USA, California and Canada models
(Carburetors No. 1 and No. 2)
5DL43-53-1
Europe and Australia models
Carburetor No. 1
5DL39-53-3/5
Carburetor No. 2
5DL40-53-3/5
Pilot jet
No. 17.5
Pilot outlet size
1.0
Pilot air jet
P.A.J. 1
No. 63.8
P.A.J. 2
No. 145
(continued)
