I think the plastic is a cost saving over using traditionel needlebearings. Again, i've never seen the plastic stuff on highend stuff. So thats why id made sence for me.
I really dont think that yamaha used the plasticbushings to "upgrade" the all mighty dt175 which didnt even had a powervalve or discbrakes. Or proper suspention for that matter. Heck, it even came with a non o-ring 428 chain, why not start the upgrade there?
Have never owned a bike that had bronze bushings stock, which ones have thoose?
Im mostly a yammie guy...
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