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366 Posts
The stock handlebar dampers are inside the bar. They reduce vibration using inertial resistance (weight) and moment conversion (linear motion to rotational motion). This is why they spin. The end cap is not the damper, it's just a grip cap, which plays a very small role in vibration control. Don't be fooled by the fake dampers sold that are essentially just bar end plugs mounted with a rubber stopper. Real dampers mount inside the bars, have some weight to them and movement internally, and frequently include an elastomer to isolate and absorb movement.
If you pull the stock dampers out to fit rigid bar end accessories, you need to install some form of damper back inside the bar. There are several on the market to choose from. Without this, vibration may be intolerable. That rotating gizmo Yamaha inserted into the bars is there for a reason, it's not just some complicated junk to hold tte bar cap in place. They are supposed to spin. If you've monkeyed with them to make them rigid, you've defeated part of their function.
Side note. I you are feeling numbness and tingling while riding with the stock bars, consider relaxing your grip, and bend your elbows to a more relaxed posture. Rigid arms and tight grip will increase the effects of vibration felt. You should not be leaning on the bars any more than necessary to maintain proper control. If you lowered the bars and are feeling the buzz, raise the bars back up. When you restrict the movement of the front end with too much grip, weight, or arm position, you stop the bike from self centering, which actually makes it less stable, while also transmitting vibration into your hands, wrists, and shoulders. Short riders who are forced to stretch to reach the bars need to be careful about grip tightness, which will amplify vibrations felt.
If you pull the stock dampers out to fit rigid bar end accessories, you need to install some form of damper back inside the bar. There are several on the market to choose from. Without this, vibration may be intolerable. That rotating gizmo Yamaha inserted into the bars is there for a reason, it's not just some complicated junk to hold tte bar cap in place. They are supposed to spin. If you've monkeyed with them to make them rigid, you've defeated part of their function.
Side note. I you are feeling numbness and tingling while riding with the stock bars, consider relaxing your grip, and bend your elbows to a more relaxed posture. Rigid arms and tight grip will increase the effects of vibration felt. You should not be leaning on the bars any more than necessary to maintain proper control. If you lowered the bars and are feeling the buzz, raise the bars back up. When you restrict the movement of the front end with too much grip, weight, or arm position, you stop the bike from self centering, which actually makes it less stable, while also transmitting vibration into your hands, wrists, and shoulders. Short riders who are forced to stretch to reach the bars need to be careful about grip tightness, which will amplify vibrations felt.
