Derbi ATV DXR 200, Workshop Manual

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184
7-4. P
OOR
P
ERFORMANCE
(
AT HIGH SPEED
)
7-4-1. Check ignition timing
A. Incorrect
1). Faulty CDI unit
2). Faulty pulse coil
B. Correct --- refer to 7-4-2.
7-4-2. Check valve clearance adjustment
A. Incorrect
1). Incorrect adjustment or worn valve seat
B. Correct --- refer to 7-4-3.
7-4-3. Check fuel filter for fuel supply
A. Abnormal
1). No fuel in fuel tank
2). Clogged fuel filter
3). Clogged fuel tank cap breather hole
B. Normal --- refer to 7-4-4.
7-4-4. Check carburettor for clogged jets
A. Clogged
1). Clean
B. Not Clogged --- refer to 7-4-5.
7-4-5. Check valve timing adjustment
A. Incorrect
1). Cam sprocket aligning marks not aligned
B. Correct --- refer to 7-4-6.
7-4-6. Check valve return spring tension
A. Broken or weak
1). Faulty spring
B. Good