Ballzy, difference between a 72 and a 73. 72's had all bogey wheel suspension, 73's had a slide type suspension but didn't use slides, just a metal rail, kinf of like scorpions para-rail, some people put the 74 suspension on as they had tru slides. The handlebars if they were 72, would be chrome and have no cover and metal throttle and brake levers. The 73's have the plastic "flipper" style levers and a cover over the bars. The 72 and 73 cowl is different, the 72 uses a rounded windshiled the 73 uses a more of a sqaured off windshield at the top. The hoods are slightly different and the 72 had metal louvers on the hood where the 73 had plastic. Kevin