Sportster doesn’t start…

Hello, neighbour of me also drives a Harley…is about a sportster bj. 92. I told him that I found a super forum where you can easily ask his questions…I just do now … his problem or better said….the problem of the Harley is: YOU DO NOT SPRING ON MORE!!!! From the starter/starter only a “crack” no more. He always had to push it first (with gear) and then let the clutch come and pressed on the start button , then she jumped on (funny or!?!..have always asked me what the guy is doing out there…if that’s normal with Harley *gg*). As I said…start button and it only “cracks” from the starter/starter. (kack clack…as often as you press on start)..Battery we tested today, so I took my car and it bridged with the battery from the Harley…doesn’t do anything either, she jumped on then very briefly but then went out again, so it came only the Ger you already know … this “how much noise when it turns on”…more not anymore. Is such a starter expensive??? Should he buy the NEW or need it…or can you make the part yourself completely?!?! I have a good screwdriver at my hand…want to hear your opinion first!!! So long wool Edit: achso …is that normal that after 14 years??? Did you hear something about carbon pencils… well, I was curious about your answers