Primary Drive front sprockets are made to meet or exceed original equipment specifications. Specifications: Using high-quality hardened steel, Primary Drive brand ATV and motorcycle front sprockets offer durability and value. Primary Drive front sprockets are precision machined for a perfect fit. Durable replacement front sprocket for motorcycles and ATVs. Manufactured to OEM specifications using high-quality hardened steel. Precision machined for a perfect fit. Larger than OEM sprockets may require removal of case guards.