Avenger 90 Bottom EndThis product listing is specifically for the AV90 Bottom End, which includes inspection and the features listed below. Features: OLYIN Hardened Bevel Gears, High Speed Crank Pin Bearing, OLYIN 42mm stroke 5 hole Balanced Crankshaft. 420+OHM Magneto Coil. Red Neodymium 45 magnet Thick Viton crank seals with over twice the friction surface area to make them over twice as hard to blow out as thin seals. Heavy clutch spring Two Brown cylinder base