TY 175 kick start shaft

[nazzy175b]

im new here so this may be on another post ? my kick start shaft is toast splines worn off ,was looking up some parts for ty"s mx's yz's etc ,there was 2 part # for what looked liked or could be same part interchangeable between models ? #525-15660-01 & 401-15660-01, there was some marked price diff ,that's why im asking if they are the same I could go the cheaper one ,thanks ,or anyone has a link to the right part for ty 175 76' ,also is changing the shaft very involved engine tear down etc ,im hoping not ,cheers greg