Re: 35 Big twin – high speed problem Home › Forum › Ask A Member › 35 Big twin – high speed problem › Re: 35 Big twin – high speed problem chris-pReplies: 2456Topics: 153 August 8, 2018 at 10:19 am #80808 There may be a certain mag setting where the plug wires are wore through in a spot and are grounding 1 cylinder?