Clutch lever plunger
You might want to check to see if you have at least some free travel on the clutch lever. On my 2016 R1200RT, the clutch lever plunger was set improperly from the factory, so that when you pulled on the lever, there was zero take up and instantly began disengaging the clutch. Without even touching the lever, it was likely putting some hydraulic pressure to the slave cylinder, which can cause the clutch to slip under high load. It is like driving a manual car down the road and resting your foot on the clutch pedal (a big no). The plunger should be adjusted so that when you pull on the clutch lever, there should at least a tiny amount of movement before you feel the resistance created to start disengaging the clutch. This will ensure that the clutch is allowed to fully engage when the lever is released. There are posts here on how to adjust the brake or clutch plungers (they have the same setup). This is a different adjustment than the round knobs for adjusting the lever positions, as they don’t change the take-up/free travel of the plunders. I was able to do the adjustment without taking the lever apart or removing the plunger, all you need is a 2mm Allen (hex) key, and a way to deal with the red Loctite on the set screw. I used the tip of a soldering iron to apply a little heat on the set screw to soften the Loctite, it was an easy adjustment.
You might want to check to see if you have at least some free travel on the clutch lever. On my 2016 R1200RT, the clutch lever plunger was set improperly from the factory, so that when you pulled on the lever, there was zero take up and instantly began disengaging the clutch. Without even touching the lever, it was likely putting some hydraulic pressure to the slave cylinder, which can cause the clutch to slip under high load. It is like driving a manual car down the road and resting your foot on the clutch pedal (a big no). The plunger should be adjusted so that when you pull on the clutch lever, there should at least a tiny amount of movement before you feel the resistance created to start disengaging the clutch. This will ensure that the clutch is allowed to fully engage when the lever is released. There are posts here on how to adjust the brake or clutch plungers (they have the same setup). This is a different adjustment than the round knobs for adjusting the lever positions, as they don’t change the take-up/free travel of the plunders. I was able to do the adjustment without taking the lever apart or removing the plunger, all you need is a 2mm Allen (hex) key, and a way to deal with the red Loctite on the set screw. I used the tip of a soldering iron to apply a little heat on the set screw to soften the Loctite, it was an easy adjustment.
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