I currently mounted the electrex stator and ignition coil. The stator fits quite well but has no markings so you'll need a strobe light to determine the correct advance. The coil is also a bit bigger than the original one and needs some stuffing and pushing to fit it under the frame. But the spark is very bright. Unfortunately it's quite expensive - round about 220€ for the stator and 220€ for the coil at hpi.be.