Polaris 2009 Trail Boss 330 Service Manual page 86

ENGINE
CAMSHAFT TIMING - METHOD 2
Method 2 - Camshaft Timing Using Flywheel TDC Mark
Crankshaft to Camshaft Centerline
Do not use dot on sprocket
for cam timing
Decompressor arm stop pin UP
(Cam lobes DOWN)
Sprocket marks aligned with
gasket surface at TDC on
compression stroke (cam
lobes facing downward, de-
compressor arm stop pin UP)
Single TDC Mark Aligned Do Not Use
Advance Marks
TDC Mark
For Cam Timing
Rotation
Do Not Use
Advance Marks
Cam Timing
(View through timing inspection hole)
Position crankshaft at TDC
3.40