This Vespa Piaggio scooter originally came with the a YB10L-BP battery which for some reason is not cross referenced over to the Yuasa catalogue. However after much research we feel we have found 2 exact match batteries that can be used as a replacement and another that we found with slightly different terminals. The conventional UB10L-B and sealed maintenance free MB10U will exactly match the dimensions and terminal type/polarity of the original battery. The UT10L-A2 is a sealed battery of the same dimenssions but uses a different terminal style which should by a none issue, but is worth checking.
Special Note: Some say they can use the UTX14L-BS battery as well. Although our measurements show that the battery UTX14L-BS case is slightly narrower (which is OK) and nearly a 0.25" longer. The case size matches to the total dimensions including the protruding vent tube of the YB10L-BP So if your vent tube was inside the tray this battery will fit as well. We do not guarantee a fitment when using the UTX14L or UTX14L-BS, but we have listed both these batteries below.