my new nichols flywheel

[desmoquattro]

fair enough ...

now, how many of these nichols flywheel issues were caused by improper installation?  pretty much ANY moving part can/will be susceptible to a murder/suicide outcome, if not properly installed.  

if the installation used either the stock single nut or the nichols dual nuts to secure the flywheel to the crank, and it/they was/were not torqued to the correct spec, the nut(s) can start to back out ... which can allow the flywheel to start tearing itself up at the points of contact with the crank shaft (the splines).

I know plenty about flywheel issues. My stock flywheel came off at 70mph...without ever having been touched by anyone outside of Borgo Panigale. That's why I have a machined stock flywheel: the case was already open, so why not?

[johnc]

I know plenty about flywheel issues. My stock flywheel came off at 70mph...without ever having been touched by anyone outside of Borgo Panigale. That's why I have a machined stock flywheel: the case was already open, so why not?

i rest my case (pun intended) ... i will assume that your motor was assembled AFTER the wine was consumed @ lunch in the factory cafeteria 

[desmoquattro]

i rest my case (pun intended) ... i will assume that your motor was assembled AFTER the wine was consumed @ lunch in the factory cafeteria 

Actually, I think the torque spec for the flywheel nut was written after wine. That was supposed to be a problem with that model year's 900 motors.

[BK_856er]

fair enough ...

now, how many of these nichols flywheel issues were caused by improper installation?  pretty much ANY moving part can/will be susceptible to a murder/suicide outcome, if not properly installed.  

if the installation used either the stock single nut or the nichols dual nuts to secure the flywheel to the crank, and it/they was/were not torqued to the correct spec, the nut(s) can start to back out ... which can allow the flywheel to start tearing itself up at the points of contact with the crank shaft (the splines).

My thoughts exactly.  I opted for the double-nut AND had nichols do the install.  The procedure looks straightforward enough, and I have the right tools, but I figured the part manufacturer would be the most qualified for this particular task.  It added a few bucks to the bill, but in return I get total confidence.   [moto]

BK