Rear hub knocking (EVT scooter)

[hubcaps219]

Got my low mileage EVT charging and she's been working great for the last couple weeks! Today however i noticed a knocking from the rear hub motor that happens on speeds from around 5mph to top speed, and happens regardless of using the motor or just coasting. It only does it when im on the bike so not when it's on the kick stand free-spinning. Noticed it this morning super quiet and thought it was maybe a stick in my fender or something stuck on the tread but it wasn't and now this evening it's much more audible. Not loud, i can't hear it in traffic, but on side roads i can easily hear it and i can feel the vibration in the floor very slightly when it knocks. It does one knock per rotation. Here's a video link which hopefully works to view the symptom happening. Any ideas? New video by Hubcaps219

 

[Tonymunn]

The Bolts that attach the hub to the rim are loose. The rim is shifting on the bolts making the knocking noise. This happened with both of my EVT brushless motor wheels. Try to make sure the wheel is centered when you tighten otherwise you may have a hop. Removing the nuts and adding blue Locktite would insure it stays tight.

 

[hubcaps219]

The Bolts that attach the hub to the rim are loose. The rim is shifting on the bolts making the knocking noise. This happened with both of my EVT brushless motor wheels. Try to make sure the wheel is centered when you tighten otherwise you may have a hop. Removing the nuts and adding blue Locktite would insure it stays tight.

Thank you so much! Yep, it totally was! I'll add lock washers.

 

[Tonymunn]

Thank you so much! Yep, it totally was! I'll add lock washers.

My current modified EVT4000E can do about 65mph. 0-60 in 8.6 seconds. It is a blast to ride. It is my first choice of transportation.