Isn't there a site glass on the side case to see the oil level? I would buy 3 Qts and dump 1 Qt in and then add the 2nd Qt a little at a time until the oil is up to the full mark. Keep the extra oil for topping off later :smiliethumbup:
To adjust the chain losen the long bolt that runs threw the rear of the swing arm. On the ends of this bolt you will see adjusters, 1 on the left, 1 on the right side of the swingarm. They have 1 small bolt each on the rear part of then with lock nuts. Losen the lock nuts, then evenly turn the small bolts on the adjuster clockwise and that will move the rear axle back and tighten the chain. Look to be sure that the axle is srtaight in the swing arm. Sometimes you my need to turn 1 adjuster more than the other to make it straight .
Tighten the lock nuts and swing arm bolt.
230 s throw the chain alot when the swing arm and/or axle bearings are loose.