i have a 08 gold wing with a 013 trike kit .it is the best investment i have ever made.i have had the kit on 7 years .i have never lost traction,the kit use to rattle i added a car shock .that goes from where the rear engine guard was to the bar that the trike wheels are. the shock is gas filled and has a coil spring and is adjustable. i also used the shortest shock i could find . i think the shock casing is 7'' plus the length of the shaft.