james12345 Posted June 12, 2009 Posted June 12, 2009 Hi all. On my R125 the other day, I was going along a smooth flat road, and as I coasted along (with only my right hand on the handlebars) I took my weight off the bar, as many do. Fortunately I had my hand still resting very lightly on the handlebars, as all of a sudden the front end started to wobbly VERY violently, with the bars vibrating from side to side. Could this be down to front wheel balance, or a sign of a bearing going, or perhaps something more serious? The front tyre has been on since new, and done about 12,500 miles. It's due for a change soon, probably next week as it has less than 2mm of tread now, but before taking it in I wanted to see if anyone else has resolved a similar problem, I'm guessing this applies to pretty much any bike out there! Thanks James.
wheelie916 Posted June 13, 2009 Posted June 13, 2009 Mine does it as well m8 dont think its much to worry about and ive had mine from new so i know nothing bads happened to it
Mark3 Posted June 13, 2009 Posted June 13, 2009 Hi James Ive had that before. Scary when unexpected. New tyre/s (get a matching set) and get the front wheel balanced when fitted. As long as there is no steering head movement at the yoke (you would be getting juddering under breaking) I can't see that being the prob. Any bike should run straight and true with both hands off. Mark
chuckles_no Posted June 14, 2009 Posted June 14, 2009 I actually had the same problem on my first YZ 80 dirtbike. Scared the heck out of me. I'm new to street bikes but my problem was a tear inside the actual tire. You couldn't see anything from the outside but it tore inside. When we put a new tire on it stopped
tzr123 Posted June 19, 2009 Posted June 19, 2009 If your tyre pressure is incorrect that may cause wobbleness, or maybe one of these; Stiff front shock(which can cause speed wobble) front wheel spindle out by a mm to much weight on one side if the wheel is unbalanced it will probably pull you to one side if it happens again dab your back brake gently and stop acclerating. hope this helps
yoda Posted June 19, 2009 Posted June 19, 2009 It is important to find out what has happened to your bike. Check all of the front including the head bearings and then start looking at the back. Check the swing arm bearings and wheel etc.
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