YAMAHA RD125LC MK2-3 Head Gasket, need i say more about this part it's got to be genuine or else a waste of mental draining hours stripping it back down again! a tip is when both Cylinder head and cylinder surfaces are ready and cleaned get some silicone based tube of instant gasket and put a pea size ball in between thumb and forefinger, tap together twice to even out amounts, do this quickly and efficiently all the way round taking care not to put to much on! when the head is tightened down this stuff will spread so be very sparing and when the whole new gasket has a smear let it dry for a minute then hold by it's edges to install, tighten the head slowly down to a maximum torque setting of 16 lbf ft and crows feet sockets to do the torquing Part Number 34X-11181-01 Yamaha Genuine Parts