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I have seen a few silica rubber touring tires for scooters, they are a low rolling resistance tire that still gets good grip.
I have switched back and forth with Amsoil in my scooters and motorcycles and altho hard to say for sure that they gave an increase in mileage it did give an increase in speed.
I also run an oiled foam air filter, because they catch more dirt then anything else I've found and wearing out your engine is not a good way to save money, you can also wash the foam filters and reuse them.
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