is closely related to the crf450r and crf450x · electric starter for easy starting in ... for improved airflow and power · new exhaust system and free-flowing muffler ... based on the awardwinning crf450r and crf450x engines · cylinder head cover is made ... of magnesium to reduce engine weight · exhaust system uses a lightweight stainless ... for maximum power · stainless steel dualexhaust head pipes resist corrosion · ... is based on the award-winning crf450r crf450x engines fully adjustable showa shocks ...