Re: Home made flywheels? Home › Forum › Ask A Member › Home made flywheels? › Re: Home made flywheels? The Boat HouseReplies: 4550Topics: 111 May 20, 2018 at 3:17 pm #76404 The flange doesn’t have a taper. It is made for a straight shaft. That is as much of an issue as the all the bolt holes. With the factories machining capabilities it unlikely they would do anything like this.