today while riding my VBB2 it suddenly stopped. It really stopped as if I had stepped on the brake pedal. I was riding quite fast (60-70 km/h) in 4th gear. My "accident" took place inside a noisy, tunnel. I couldn't really hear the motor running or anything wrong. Luckily I didn't crash. When I had calmed down I started the engine again and drove home slowly, better safe than sorry. Everything seemed normal as if nothing had happened. I haven't been able to figure out what happened, any suggestions? Has anyone been through anything similar.