Oilseal Crankshaft Center $ 115.00 SKU: Oilseal Crankshaft Center MC18 Center crank shaft oilseal. Back to: New Parts ×Close RGV Spares special parts 2 stroke parts to suit RGV, NSR and TZR. www.rgvspares.com Description An exact replica of the MC18 center crank shaft oil seal. Manufactured by a mainstream automotive seal manufacturer. Suits the following: MC18 - R2j and R4j. RS250 NF5.