23-03-2018, 11:31 PM
(23-03-2018, 08:55 PM)HZetomagneto Wrote: Glad to see you have found the cuprit Charles.
As a matter of interest what is the rear main bearing you are using, presumably a large ball bearing?
What is the advantage, and part number or dimensions of the bearing please.
Best Wishes
Gene
Yes, large ball race - whichever one has the same ID and OD as the original roller. Don't have the spec to hand.
The advantage is that when your engine is buzzing along at 5,500 revs when you press hard on the clutch you are not then adding insult to injury by loading the crank still further when it is already bending under whip. It also takes away the risk of front bearing flange fracture.
Overall a much more sensible approach to the bottom end.
The important factor is to make an accurate spacer to go between the flywheel and the bearing to resist axial movement. Mine has 2 thou clearance with the flywheel loaded to a known and repeatable torque.
Charles