Arctic Cat 2016 DVX 90, Service Manual

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Problem: Exhaust smoke dirty or heavy
Condition Remedy
1. Piston rings - cylinder worn
2. Cylinder wall scored - scuffed
3. Crankcase over-full of oil
4. Air filter too much air filter element oil
5. Carburetor jets incorrect size (too big)
1. Replace - service rings - cylinder
2. Replace - service cylinder
3. Drain excess oil from crankcase - recheck oil level
4. Use recommended type and quantity air filter element oil
5. Use recommended carburetor jets
Problem: Engine lacks power
Condition Remedy
1. Piston ring(s) - cylinder worn
2. Spark plug fouled
3. Spark plug gap incorrect
4. Carburetor jets obstructed
5. Float level out of adjustment
6. Air filter element obstructed
7. Intake manifold leaking air
8. Brake(s) dragging
9. Drive axle bent - worn bearings
10. Drive chain - sprockets stretched - worn
1. Replace - service rings - cylinder
2. Clean - replace plug
3. Adjust gap - replace plug
4. Clean jets
5. Adjust float arm height
6. Clean element
7. Tighten - replace manifold
8. Adjust brake(s)
9. Straighten - replace axle
10. Replace sprocket - chain
Problem: Engine overheats
Condition Remedy
1. Carbon deposit (piston crown) excessive
2. Engine oil low
3. Octane low - gasoline poor
4. Oil pump defective
5. Oil filter/screen obstructed
6. Float level low
7. Intake manifold leaking air
8. Air filter element obstructed
1. Clean piston
2. Add engine oil
3. Drain - replace gasoline
4. Replace pump
5. Clean filter/screen
6. Adjust float arm height
7. Tighten - replace manifold
8. Clean element