Polaris Virage TX 2000 Service Manual page 164

ENGINE
Crankshaft Indexing
8 . With the pointer aligned, make sure the degree wheel
and pointer are secured and will not move out of
position. Re-check accuracy of this location by
repeating steps 4 and 5. The pointer should align
with the 120° mark when measurement is taken
between 2 scribes and divided in half.
IMPORTANT: Do not move the degree wheel or pointer
after the initial setting on the mag end cylinder - simply
read the wheel and dial indicator.
9 . Install the bumpertool in cylinder #2 (center). Repeat
steps 4 through 6 for cylinder # 2. It should be 120° (±
2°) from cylinder #1. Proceed to PTO cylinder (#3).
Cylinder #3 should also be 120°(± 2°) from cylinder
#1.
Symptoms of an out of index crankshaft can include:
• Difficulty calibrating carburetor (repetitive plug
fouling on one cylinder with no other cause);
• Unexplained piston failure on one cylinder (i.e.
severe detonation, broken ring lands, piston hol
ing);
• Excessive vibration of engine, backfiring, etc.;
• Rough idle, poor top speed.
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