My spare engine from my 490 twinshock. Details for engine below. From an 86 yz 490, but will fit the WR as well. New/reconditioned 5spd gearbox fitted New con rod and piston fitted (bored 0.17mm over to help with detonation) Cylinder head fitted with decomp and had modification to help with detonation. Good Clutch (with cable helper fitted, much better) Good electrics Comes with reed block, exhaust springs and kick start. This engine has approx 2/3hrs on it since work was carried out, so it’s ready to plug in and play. Collection available or courier.
