At first my motor would vibrate horrible at higher speeds as most report. An anbull 66cc. Its top speed is 28mph stock. I'm 220lbs.
I had purchased a JRL top end bearing off Amazon for a mere $5 and that with shaving my piston skirt down about 1mm (just enough to clear the intake) has really reduced my vibration issues.
I believe its because the bearing is wider than the stock bearing. As you can see in the photo. So this means that without this bearing, an engine has like 2mm of play in the top bearing. 2mm!!!! Can you just imagine how violently that bearing is being thrown around in there side to side, as you lean on turns, engine conditions changing, etc, with 2mm of play?? It may not be in the hole completely, causing violent vibrations. This bearing has taken care of that issue for me. I just wanted to share this with others who are experiencing the same problem. This thing is only $5.
I actually took it apart just to share these photos. This is the single best $5 you will spend, very closely tied with a jet set.
VS.
-Shawn
I had purchased a JRL top end bearing off Amazon for a mere $5 and that with shaving my piston skirt down about 1mm (just enough to clear the intake) has really reduced my vibration issues.
I believe its because the bearing is wider than the stock bearing. As you can see in the photo. So this means that without this bearing, an engine has like 2mm of play in the top bearing. 2mm!!!! Can you just imagine how violently that bearing is being thrown around in there side to side, as you lean on turns, engine conditions changing, etc, with 2mm of play?? It may not be in the hole completely, causing violent vibrations. This bearing has taken care of that issue for me. I just wanted to share this with others who are experiencing the same problem. This thing is only $5.
I actually took it apart just to share these photos. This is the single best $5 you will spend, very closely tied with a jet set.
VS.
-Shawn