Roller.
Hi.
Had a bit of roller tinkering on my o'l DR350.
Just be aware that some folks swap the upper roller with the lower one when it wears giving the impression that the upper roller takes a lot of chain pressure.
I ran it for quite a while on off road without a roller and although it did "de sprocket" once even though there was a nylon chain guide on the swing arm. I replaced the roller and never had another issue.
Just so long as your suspension sag and chain tension is set up ok it should be fine for the most part.
I replaced a nylon chain "rubber" on an XR650L with a roller and it was fine, there are a few rollers with sealed bearings (All balls) which should stop siezures after water and mud abuse!
Have fun.
Dave.
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