Fat guy on a little bike!
Join Date: Oct 2008
Location: Chicagoland, Illinois
Rep Power: 1
The reason the basket on DR got grooved so fast is because it's a single cylinder engine. The torsional vibration a single makes is really tough on engine drivetrain items. The 919 being a four cylinder, will take tens of thousands of miles to damage a basket anywhere near that bad.
Also, any extra "play" that grinding the basket will introduce, will only aggravate the problem. The play is the enemy and while grinding will provide smoother actuation for a while, it will get worse, faster.