My WR426 requires a quart of oil everytime I ride. Is this normal? The bike isn't smoking - It must be loosing the oil through the crankcase vent. Is there a fix? I rode a DRZ400 this weekend that was snappy revver with a 13/52 gearing. My WR is still stock 14/52. Will a 13 tooth counter sprocket enable my WR to wheelie pass the DRZcrap400?