In my view they are certainly worth it... I've got one on my KTM and once you have sussed out flow rates etc they are pretty much fit and forget. That said they make more sense with big mileages. I've done 13,000 miles in six months and in that time I have never had to adjust the chain. If youa re doing small / weekend mileage then I guess cans of lube will do the job just as well.
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