It depends on what exactly is flickering. Are only the backlights flickering, or are the speedometer numbers also?
If it is just the backlights, you could have burned out bulbs where the filament has burned but is still touching the other side enough to flow current. When you hit bumps, the two halves separate and the lights go out. I have one bulb doing this now which was somewhat perplexing until I removed it and found what the issue was.
If the speedo numbers are also flickering, it sounds like you either have a bad connection at the instrument panel or your battery is running low. I would check to make sure there is no water in the connector (remove, blow out with air, apply dielectric grease). Before doing that, however, I would check the battery voltage at the terminals while the engine is off and while running to see what kind of charge you are getting.
thank you guys for your advice... I been keeping the battery on a tender, it's new a week ago. It was doing this with the old battery as well, that's why I replaced it. Still doing it, though not as extreme, or cosistently if you will. I don't think it's the connection, cause it's mostly when it's in neutral and not moving. Alternator maybe? Not keeping a good enough charge at low rpm's... I hope not... I'm sure that's not cheap.
We're going to need more information in order to help. Again, what is flickering? What are the voltage readings? It doesn't make sense that something flickers while the transmission is in neutral, as why would this not happen while the bike is idling with the clutch disengaged?
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!