ive never heard of people using flywheel weights on atvs, are they too heavy for you to really notice it? ive rode alot of dirt bikes, a few with and without the added weight and it seemed like the weighted ones lugged through trails and lower rpms alot better and also went into the power alot smoother helping with traction then the non weighted ones. like i said never heard of one on an atv. for those who dont know what im talking about. http://www.rockymountainatvmc.com/p/48/77/228/926/-/6068/Steahly-Heavy-Flywheel-Weight