Aprilia RS 125/ KTM 640 LC4 Supermono

Good news, latest test run was a success. Appears to be getting full power now and runs pretty well. Have booked first track day for friday 6th oct at Mallory. Still a couple of jobs to do. Th R6 Master cylinder that i was expecting to be 16mm was 14mm. so i have now ordered a TRX850 Master cylinder. The gearbox output shaft seal is slightly weeping so have ordered the parts to do that. Currently the front sprocket is 16T and rear is 41T, the front is limited for space and i don't fancy fitting the 17T, ill run it at Mallory as is and maybe put a 38T on the back depending on that day. No repeats of the Solenoid saga so far, think the sputnik solenoid may have fixed it.

Got a short test in last week on a quiet bit of road at a secret location, It started and ran ok, but once moving it was clear that it is only running properly at part throttle. Back at base and a bit more research and it looks like i have some ports on the carb blocked or unblocked since i removed the air valve gizmo. The large port on top of diaphragm cap needs to be blanked so that vacuum from inside carb body can open the slide. I had it open. The port on right hand side of carb is actually a vent for the float chamber so needs to be open. I had it blocked. The metal pipe elbow from the top of carb body needs to be open as this vents the space below vac diaphragm to allow slide movement, i had that blocked too. Should be better now. Hope to get another test in later this week. I have ordered an R6 Master cylinder for front brake and some new EBC track pads. The Master cylinder is 16mm where the old one is 13mm i think.

Been busy again recently. Decided to try to get to the bottom of the starter solenoid problem. Stripped back the wiring loom and stripped out all the wires I don't need and most of the spare connectors. Re-bound it and fitted the biggest solenoid available, which is good for 150A continuous!. Shouldn't be a problem welding them shut now, and so far so good. T