2007-2008 Polaris IQ Snowmobiles Service Manual, Page 291Get this manual
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Battery and Electrical Systems Ignition Timing Chart
128mm ROD 68mm STROKE MM Inches 0.0066 0.0003 0.0262 0.0010 0.0590 0.0023 0.1048 0.0041 0.1637 0.0064 0.2356 0.0093 0.3205 0.0126 0.41