Hello, dear KTM driver, my son is driving a 690 SMC-R (without ABS) built in 2013 with an open sports air filter and (illegal) Akrapovic exhaust system. The KTM has a good 70 hp. For some time now, the clutch has been slipping on the machine as it accelerates and the slipping has intensified since then, even with moderate acceleration. The KTM has run just 8,000 km; a clutch should hold at least 20,000 km. Moreover, my son is not one of the brutal driving. On the weekend we disassembled the coupling with the following result: Length of the (four) compression springs: 33 mm, i.e. new condition. Thickness of the friction coverings: 2.7 mm, i.e. almost new condition. All steel lamellas without traces of overheating and without distortion (glass plate test / tipping and with sensor gauge). The oil is a MOTUL SAE 10 W/ 60, as most KTM workshops use it. We have only ordered reinforced coupling springs, although the original ones are still in order, but this is 1.) Now to my question: The clutch of the SMC-R is an “anti-hopping” coupling. It is intended to prevent the braking effect of the motor from having an excessive effect on the rear wheel when switched down, which can lead to a lateral slipping of the wheel, especially in the event of slanting in the curve. The four anti-hopping springs act in the clutch towards “running”, thus pushing in a direction of force which is the direction of force of the clutch pulley. The actual compression springs must therefore overcome the force of the AH springs and still provide enough pressure so that the clutch builds up enough friction value and does not slip. So if one assumes that one does not need this anti-hopping effect, because one is not a brutal supermoto driver, not so vehemently shuts down from high speed before curves and lets the clutch come softer, in other words: more sensitively coupled, then we have to The AH feathers are actually superfluous. In any case, however, the release of these feathers has given rise to additional pressure on them. If any of you have done this before and can share your experiences with me. Lonzoglunz