check out the link and see if you can identify the hole on my carb just above the main fuel inlet. I have found that if I plug this hole the chappy runs good, but if I leave it open it sputters when i give it throttle. Is it ok to cap this hole off or will it hurt my motor. http://s281.photobucket.com/albums/kk205/ownerator84/chapy/ if the link does not work, please just copy and paste the address into you address bar and it will take you there.