1988-1991 Yamaha Sno Scoot SV 80/E Snowmobile Service Manual, Page 193Get this manual
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SPECIFICATIONS MAINTENANCE SPECIFICATIONS
48.9449.00 mm (1.9261.929 in) mm (0.2 in)
0.035 0.040 mm (0.0014- 0.0016 in) 49.50 mm (1.949 in) 0.5 mm (0.02 in)Inlet side