Saw these on the 'bay. Wonder if they're more robust than the spherical bearing as standard?
https://www.ebay.co.uk/itm/Yamaha-TTR250-99-06-RFX-Race-Series-Lower-Swingarm-Shock-Bearing-Kit/401291255310?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649
Anyone tried them?