Crank Rear Oil Seal Conversion 10CC Midget & Sprite (1098cc version only). For Sprite/Midget engines with 10CC engine code. 1098cc engines using the larger 2" main bearings. Will NOT fit 948cc engines. For 1098cc Minor engines (code 10M) use part no. 10M800. Please note: This conversion is intended as an upgrade for the A-series engine for fitment during a full engine rebuild. It will not work as a 'sticking plaster' to prevent oil leaks on a worn engine.