first, check tire condition. is it balding. is it at proper inflation. then check to see if the rear shock can be adjusted. it should be threaded with 2 locking rings. raising the adjuster nut outwards will increase the rear ride heiht (this requires a spanner wrench or long screw driver with hammer).
raising there rear ride height or lowering the front ride height will increase turning speed. it will make the bike lean quicker.
check to see if the fork legs have been dropped down on the tripple clamps. if it's dropped alot, then the dogbone may have been replaced (lowering kit).