I just received OES sliders.
There is a note inside the package:
"Caution!!: Use permanent strength (red) thread locker on right screw (brake lever side) & medium strength (blue) on left screw (clutch lever side).
I used medium on both sides.
...And also:
"Swingarm Spools
Special advisory:
Due to the location of the factory exhaust, specifically the position of the exhaust outlet, the swingarm spools cannot be used on the bike while riding. The spools should be used during maintenance only (wheel removal, chain maintenance, bike parking/storage, etc.) Use of the spools while riding will cause melting and deformation of the right side spool due to heat directed from the exhaust system.
An exception to this requirement is in a case where a Ninja 650 or Z650 has an aftermarket exhaust that does not direct concentrated exhaust gas onto the spool in the same way as the factory exhaust system."
I installed the left one only.