There are a few relays that cause issues on the 749. The first is the fuel pump relay, which lives behind the battery box. It only costs a few quid to replace and it is best to swap it at every service to avoid breakdowns. The headlight relay, which is nestled inside the headlamp unit, fails and this causes first the lights to flicker and then the whole electrical system to go into meltdown! If the lights start to play up, swap this relay without delay!