THIS FITS THE 1982 AND 1983 PASSPORTS AS IS... BUT FOR THE CT90'S YOU WILL NEED TO DO SOME CUTTING AND/OR GRINDING. SEE THE SERIES OF PICTURES BELOW 50381-GB6-700 @ AREA'S TO BE GROUND IN YELLOW ALSO_SEE_TOP_PIC some_models_will_need to_remove_more of_the_rear_bracket @ STOCK BATTERY FITS LIKE A GLOVE @ STUD GROUND OFF FLUSH WITH BACK SUPPORT @ LOOKING GOOD AND FITS RIGHT IN @ WITH_STOCK 6N5.5_1D BATTERY @ FINISHED AND LOOKING GOOD