Honda CB350 Repair Manual page 167

162
TROUBLESHOOTING
Carburetor Troubleshooting (cont.)
Problem Possible Causes
Inspection/Remedy
Lean mixture throughout
throttle range
Fuel filters clogged or dirty
Gas cap vent blocked
Damaged or worn throttle slide
Air leaks at carb manifold
Remove and clean. Refer to Chapter 6.
Blow clear.
Replace.
Refer to Chapter 6.
Rich mixture at sustained
mid—range speeds
Rich mixture at sustained
high—speeds
Air cleaner dirty
Main jet too large
Carburetor flooding
Main jet too large
Carburetor flooding
Clean or replace.
Replace with smaller jet. Refer to Chap—
ter 6.
See above.
Replace with smaller size jet. Refer to
Chapter 6.
See above.
Air cleaner dirty Replace or clean.
Rich mixture throughout Carburetor flooding See above.
throttle range j ;
E Air cleaner dirty Replace or clean.
Chassis Troubleshooting
Problem
Possible Causes Inspection/Remedy
Drive chain noise
Chain slaps due to excessive
play or whines due to insuffi—
cient play
Adjust as described in "Maintenance,"
Chapter 2.
Excessive vibration
Engine mounting bolts loose
Broken frame
Drive chain badly worn, un—
lubricated, or too tight; worn
sprockets
Loose spokes
Rims out—of—true
Wheels unbalanced, especially
front wheel
Loose axle nuts
Worn or
bearings
loose steering head
Crankshaft bearing failure
Secure mounting bolts.
Replace frame or have damage rectified
by competent welder.
Replace, lubricate, or adjust drive chain;
replace sprockets.
Tighten spokes; have rim trued as soon
as possible.
Have rims trued.
Balance wheels.
Tighten.
Adjust or replace bearings as necessary.
Refer to Chapter 8.
Inspect and replace if necessary. Refer
to Chapter 4.
Poor front fork operation broken Weak, collapsed, or
fork springs
Insufficient oil in forks
Too much oil in forks
Oil of wrong viscosity being
used
Inspect and replace. See Chapter 8.
Refill with correct amount.
Drain and refill with correct amount.
Use higher or lower viscosity oil to
stiffen or weaken fork action.