Simple. Use oem drain plug with new crush washer everytime. There is a torque spec for it in the manual but I just Tighten it until everything makes contact, then a little more until I feel the crush washer "crush"
Never had oil leakage with this method.
People strip it because they over tighten, not because of design.
Btw, my s2r1000 has magnetic drain plug stock. Your s4rs probably does as well.
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