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 MumblesReplies: 5764Topics: 298 August 8, 2018 at 2:46 pm #80821 You’ll need new or clean and polished points, NGK B8S plugs, good coils and new condensers to get good and reliable spark.