(31-12-2018, 03:24 PM)AustinWood Wrote: I imagine that the centre can break away because it will be stressed by the crankshaft whipping.
One of the beauties of a (properly functioning) 3 bearing engine is that they don't to any great extent.
(31-12-2018, 01:39 PM)Steve Jones Wrote: There's certainly metal that can be removed from the engine side of the flywheel but a word of caution. I did this once but, eventually, the flywheel centre boss cracked away around its complete circumference due, I imagine, because too much was taken off. A good radius was formed at the junction of the boss and the flywheel but it still broke away. The only indication that this had happened was a slight 'rumbling' from the engine at tick over and when taking up load.
Steve
Steve, do you recall how thin it was where it failed? That would be fairly easy to compare. I've not measured mine yet but it does feel a bit skimpy betwixt my fingers.