This boot will work on any year of ct70.It goes between the carb and the airfilter box. It has been modified some over the years. 3B @ REAR_AIRBOX_BOOT CT70_K0_TO_1978 CT70HK0_HK1 7/21M (268W)IF YOUR CT70 IS ALL STOCK, AND THIS PART IS BAD OR MISSING, IT WILL NOT RUN AT HIGHER RPMS AS IT SHOULD. HONDAS ALL USE WHAT IS CALLED A TUNED INTAKE SYSTEM, AND IF ANY PART OF THE SYSTEM IS BAD OR MISSING, IT WILL NOT RUN LIKE NEW. 268W