54
Front Sprocket
Rear
Sprocket
Gear Ratio
10
37
3.70
11
41
3.73
10
38
3.80
11
42
3.82
10
39
3.90
11
43
3.91
10
40
4.00
11
44
4.00
11
45
4.09
10
41
4.10
11
46
4.18
10
42
4.20
10
43
4.30
10
44
4.40
10
45
4.50
10
46
4.60
Ratio Write © Cobra
R&D 2004
Carburetion
Although your Cobra is sent from the factory with the carburetor jetted for optimal
performance, you may find it necessary to adjustment your particular jetting due
to current weather conditions, altitude, fuel variations, and/or engine
modifications.
CAUTION:
Proper jetting is very
important for engine performance and engine life.
Symptoms of improper jetting are listed below.
•
Symptoms of incorrect oil or oil / fuel ratio
o
Poor acceleration
o
Misfire at low engine speeds
o
Excessive smoke
o
Spark plug fouling
o
Excessive black oil dripping from exhaust system
•
Symptoms of too rich a fuel mixture
o
Poor acceleration
o
Engine will not ‘rev’ out, blubbers on top
o
Misfire at low engine speeds