2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 34Get this manual
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COMPRESSION PRESSURE MEASUREMENT
Compression pressure (at sea level): Standard: 1,500 kPa (15.0 kgcm2, 213.3 psi) at 400 rmin Minimum: 1,400 kPa (14.0 kgcm2, 199.1 psi) at 400 rmin Maximu