Regulation of iron absorption and transport. Iron for use in synthesis of heme, iron-sulfur centers and other non-heme iron proteins is obtained from the diet and via release of recycled iron from macrophages of the reticuloendothelial system that ingest old and damaged erythrocytes (red blood cells).
Four-stroke oil is more like the oil used in cars but both 2-stroke and 4-stroke oil serve the same purpose - to keep the engine lubricated. Four-stroke dirt bike oil comes in a variety of weights like 10w-40, 20w-50 and so on. It is not mixed with gas.
No, the engine oil and trans oil are not fed from the same tank on H.D. bikes. Engine oil is separate, from the primary drive chain on 4 speed big twins, the transmission oil is also separate. Sportster engines have separate engine oil and their transmissions share primary case oil with the wet cluâ¦.