Generic Race 50, Service Manual, Page: 30 / 209

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Trouble diagnosis program for excessive fuel consumption
Engine fuel consumption
is excessive
Check for correct method of
operation and usage
Erect main jiffy stand and rotate
wheels by hand
1. Check if motorcycle has ever run
under overload, at non economical
vehicle speed, or in low gear
2. Check if brand of the gasoline
used is correct
Wheels rotate
dully
Wheels rotate
freely
1. Check brake for
retard
2. Check wheel
bearing for excessive
wear
3. Check for missing
or comparatively short
intermediate spacer of
wheel hub
Check tire
pressure
Air pressure
too low
Air pressure
normal
Inflate until
full as required
Check fuel tank, fuel cock, oil
delivery pipe, carburetor, etc.
for oil leak
Troubleshoot as
appropriate
Check mixture ratio of
combustible mixture
Mixture ratio of combustible
mixture normal
Combustible
mixture too rich
Combustible
mixture too thin
Check engine for too high
idle speed
1. Check air cleaner for
clogging
2. Check carburetor float for
insufficient height
3. Check for oversize main jet
on carburetor
1. Check inside of
carburetor for clogging
2. Check carburetor float
for height excess
Check and adjust
carburetor
Use an ignition timing
light to detect if engine
ignition timing is
correct
Check for clutch
drive belt slip
Check ignition
system