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.
@ 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.