I still trying to figure out the history on this 05 CR250 I toke off the left side cover and did not expect to see this type of flywheel. Can anyone identify this flywheel to a manufacturer and possibly a weight? What effects does this have being on the bike? I really don't feel like riding a tame bike because I bought a 2-stroke to rip Is this removable or do I need to purchase the OEM? Or is it OEM and I just wasted a thread?