It's normal, happens to all bikes. The wheels want to follow the grooves in the road. Just don't clamp down hard on the handlebars and you'll be fine. It's like they say in the old .38 Special song: "Hold on loosely, but don't let go. If you cling too tightly, you're gonna lose control." They may have been singing about something else, but the advice is just as true for riding on grooved road surfaces.
(Note: Moved to General Discussion because question isn't Wee specific. You'll get more responses there.)
- Jet Jaguar
It's not an adventure unless you need a tent, a passport, and a leather glove for your shooting hand.