2004 Bombardier Rally 200 Series Shop Manual, Page 230Get this manual
Section 06 DRIVE TRAIN Subsection 03 (REAR AXLE)
V02H01A
A404 mm (15-2932 in)
CAUTION: Replace chain no1, engine sprocket and rear sprocket no5 together to prevent rapid chain and sprockets wearInstall new tab washer each time the engine sprocket is removedV06H03A
REAR WHEEL HUB
Removal
Lift rear of vehicle and install jack stands under the frame to support the rear of vehicle off the groundRemove rear wheelNOTE: Use the same procedure for both wheel hubsApply rear brakeRemove rubber cap no6Remove cotter pin no7 and unscrew elastic nut no8Discard the cotter pinRemove washer no9 and the O-ring no10
Drive chain Adjuster lock Sprocket hub Chain tensioner
Adjust chain deflection by slowly moving the ATV forward so any slack that may have previously been on the lower part of the chain is now on topThe bottom part of the chain should be tight during adjustmentThe deflection should be between 20 and 30 mm (34 and 1-316 in)