Hello, maybe someone can help me? I recently bought a Honda Dominator NX 650 Bj. 91. I haven’t driven 500 km on it yet and now it has from today to tomorrow ignition oscillators from 4200 RPM. I.e. up to 4200 RPM it runs quite normally. From 4200 RPM the tachometer suddenly goes back to approx. 2000 RPM, without changing the actual speed however. If you don’t take the gas back then the ignition oscillators start. If you increase the gas, the ignition oscillators will degenerate. These triggers are always over 4200 rpm, not every few seconds or sometimes. Under this striking speed it runs as I said quite normal and the rev indicator is also right again. Maybe someone knows the problem from you and can help me. Thank you in advance. mfg