2004 Ski-Doo Racing Handbook, Page 84Get this manual
SECTION 04ENGINE PREPARATION
TUNING THE MAIN JET SYSTEM
R 2022 (S)10 (S)10 (S) 2022 (S)
Fuel flow
Troubleshooting
When the carburetor setting is not correct for the engine, various irregularities are noticedThese can be traced to two causes as whole: 1When the airfuel mixture is too rich: aThe engine noise is full and intermittent (four stroking)bThe condition grows worse when the enrichner is openedcThe condition grows worse when the engine gets hotdRemoval of the air cleaner will somewhat improve the conditioneExhaust gases are heavyfSpark plug is fouled2When the airfuel mixture is too lean: aThe engine overheatsbThe condition improves when the enrichner is openedcAcceleration is poordSpark plug electrodes are meltedeThe revolution of the engine fluctuates and lack of power is noticedfPiston seizure or scuffing occurs