03-08-20, 08:24 PM
If you grab the end of the swingarm and lift it will move slightly about 1-2mm that's normal. If it's knocking so you can hear it and moves more than 2mm but less than 4mm it's more than likely the bearings need repacking and/or the seals on the linkages have failed.
It's all about tolerance and there must be some play to allow for the grease, they're 4 bearings if each has 0.5 that's 2mm at the end of the swingarm. Most cases they just need repacking and the seals replacing, these are 12k service items, often not done. You'll have to check each bearing and pin for wear, if they're gritty, rusted, damaged (the needles drop out as you remove the pins) or there's more than 0.5mm play without repacking with grease, they're shot.
It's all about tolerance and there must be some play to allow for the grease, they're 4 bearings if each has 0.5 that's 2mm at the end of the swingarm. Most cases they just need repacking and the seals replacing, these are 12k service items, often not done. You'll have to check each bearing and pin for wear, if they're gritty, rusted, damaged (the needles drop out as you remove the pins) or there's more than 0.5mm play without repacking with grease, they're shot.
Later