2008 Yamaha Rhino YXR70FX Factory Service Manual, Page 182Get this manual
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VALVES AND VALVE SPRINGS
Compressed spring force 171.0197.0 at 35.00 mm (17.4420.09 kg at 35.00 mm, 38.4444.29 lb at 1.38 in)
12.Measure: spring tilt Out of specification Rep