I'm still confused about leaded and bad/low octane fuel for xt660z. I found several post here and there but didn't find 100% answer. Let's try to clear this out.

If I want to use leaded fuel, tenere will run more or less like on a un-leaded but I have to:
before the trip:
- change pipes to a non-cat version
- disconnect a lambda sensor
after the trip:
- reconnect a lambda sensor (it should be OK after leaded fuel???)
- change pipes to a cat version
?

If I want to use bad/low octane fuel, tenere will run OK but I have to:
- clean fuel filter more often
?

Will the engine be OK after running on leaded and low octane fuel??

Thanks!