We are pleased to offer these superb quality brand new 139cc Big Bore barrel kits from Mitaka. The RS125 come with a nikasil lined barrel which is very durable.The following is included in the kit. Standard cylinder produces 27HP, this kit is guaranteed 31-35HP!!! These are in no way inferior to the original and will last if looked after correctly. We also stock the standard kits for the RS125 & AF1 and the Cagiva Mito. DO NOT PUT PACKAGING TAPE ON THE PRODUCT PACKAGING. If you would like to return your item please follow the following steps. (3) Send back via the Post office or reputable courier. (4) As soon as we receive the item back we will process it within 48 hours. M or via reputable courier. The item "Aprilia RS125 RS 125 140cc Big Bore Barrel / Cylinder & Piston Kit 122 1997-2013" is in sale since Thursday, May 21, 2020. This item is in the category "Vehicle Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Cylinder Barrels". The seller is "biketyresuk" and is located in West Yorkshire. This item can be shipped worldwide.