Guest Posted August 4, 2013 Share Posted August 4, 2013 Ok here goes. My front end wobbles like crazy on heavy deceleration. I've got an 05 vfr800 non abs. If Im going pretty fast and then let go of the throttle and lightly hold the handles , the front end will wobble back and forth hard and fast. Unless Im holding the grips tight. Why's this happening. Help!? It's still ride-able. Just concerned that its gonna cause me to wreck. Thanks for the help! Hi there, I had the same problem (on my 2008 VFR800 I bought 2 and a half years ago, it has 43000 Km on it): I speed to 120 Km/h and let go of the handlebars leaving the bike decelerate, between 80 and 60 it used to wobble like crazy. changed front rim and tire 5 months ago, but that didn't fix it.... The wobble was completely GONE when I changed the steering stem bearings with non OEM ones 4 months ago. Bearings are cheap but took the Honda dealer here 3 hours to replace (still cheaper than fixing anything else on that front end!) Link to comment Share on other sites More sharing options...
Beck Posted August 4, 2013 Share Posted August 4, 2013 You might have experienced a deceleration shimmy and it's normal... some bikes may shimmy decelerating through the 45 mph range... keeping your hands on the bars should arrest most of the front end shimmy... some bikes shimmy more than others and it's no big deal with your hands on the bars in the critical speed range... your bike should be immune at speeds above 45 mph... Deceleration shimmy is chiefly the product of non OEM or a worn front tire... it ain't the product of tire cupping... but low pressure or loose steering head bearings defeat the tire's corrective efforts... because every bike has this instability... it is held in check by damping forces created mainly by the tire's self-correcting tendencies... You might have experienced a deceleration shimmy and it's normal... some bikes may shimmy decelerating through the 45 mph range... keeping your hands on the bars should arrest most of the front end shimmy... some bikes shimmy more than others and it's no big deal with your hands on the bars in the critical speed range... your bike should be immune at speeds above 45 mph... Deceleration shimmy is chiefly the product of non OEM or a worn front tire... it ain't the product of tire cupping... but low pressure or loose steering head bearings defeat the tire's corrective efforts... because every bike has this instability... it is held in check by damping forces created mainly by the tire's self-correcting tendencies... My front tire (Dunlop) was cupping quite badly at one time and a front end shimmy started to come up when I decelerate on my bike from moderate highway speeds..... The shimmy went away 100% when I replaced my tires and never came back again....Difference?, my fronts do not cup anymore (MIchelins).... In my case the shimmy was definitely a symptom of my Dunlop front tire wearing out and cupping badly.... Link to comment Share on other sites More sharing options...
Member Contributer BusyLittleShop Posted August 4, 2013 Member Contributer Share Posted August 4, 2013 In my case the shimmy was definitely a symptom of my Dunlop front tire wearing out and cupping badly.... True your tire was worn and was definitely the chief symptom of deceleration shimmy but cupping is a normal ware pattern and not the chief symptom of deceleration shimmy... CUPPING: Cupping, which is more accurately described as scalloping (see pictures, but we will use the more common term "cupping" here), is a natural wear pattern on motorcycle tires and it will always follow the tread pattern. It is not a sign that you have bad suspension parts. It merely shows that your tire is indeed gripping the road when you make turns (thank you for that Mr. Tire!). This cupping develops within the side wear bands of a leaned motorcycle. Link to comment Share on other sites More sharing options...
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