If your bike has an electrical or manual speed sensor on the front wheel it sounds as if a drive tab or two might have broken off.
Have had the same problem and thats what it was.
Just drop front wheel and see if any chuncks come from behind the sensor.
Hope this helps you..If it does just check ebay for a new sensor [cheap].
Then clean wheel and inst. replacement sensor.
I would also recomend getting a anew seal for the sensor.
Hope this helps......Barry
Have had the same problem and thats what it was.
Just drop front wheel and see if any chuncks come from behind the sensor.
Hope this helps you..If it does just check ebay for a new sensor [cheap].
Then clean wheel and inst. replacement sensor.
I would also recomend getting a anew seal for the sensor.
Hope this helps......Barry