Cox Customs RD350 box swingarm

[bitzz]

Yes. Like any tapered bearing it runs with "some" preload. The same as on your car wheels

... and you'll never convince me that a tapered bearing swingarm pivot is anymore than bling, with a side of overkill.
A little bit of "bind" in the swingarm pivot isn't a bad thing. That "bind" works as a damper on the spring, like the shock. Up to a point that "bind" is a GOOD thing
The TRICK is that "bind" has to constant.
There is nothing wrong with the stock setup, with a bronze bush. If you're putting enough force into your swingarm that you're mooshing a proper fitting bronze bush, you've got other problems

[rlloydm]

Just FYI Motolanna swingarms are back in stock - just ordered one for my race bike: https://www.motolanna.com/ourshop/prod_448876-Swingarm-Aluminum-Alloy-SuperTuff.html

[irk_miller]

It looks like a Radian swingarm, which I like to run on RD and XS.