1990-1995 Ski-Doo Snowmobile Shop Manual, Page 3Get this manual
number identification
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Rotax automatic variable exhaust (RAVE) (454, 583, 643 and 670 191 196 Piston, Crankcase, crankshaft and rotary valve 206 valve and shaft 221
Air silencer 247 Carburetor 248 Fuel pump 271