Well the reason i want you to try this.Their is a o ring in the carb and iif it is bad it wont regulate the amount of gas the goes in the carb. Let me know if this help you or not tomorrow. Uf not will try something else. These are great old bike. I love them and wouldnt sell mine for no amount of money.I going to up load some pic of mine here soon after i can wash it,To cold and snowy to do that right now.