Help with electrical problem??

1 reply [Last post]
Joined: 01/02/2010
Points: 19

I have had my 450 Luyuan for 3 years now and have just changed batteries. I can't get the same diatance with the new ones that I used to get when my other ones were new. New batteries have been checked and they are ok. I do notice that when I connect the 48 volt fuse on the battery cable it sparks with the key turned off and the button on the handle bars in the off position. I belive that it must be a wiring fault. Has any one have a diagram for this system?? I'm a mechanic but would love a diagram before I start to take it apart. Also it's not right to get this saprk correct???? thankyou.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
MEroller's picture
Joined: 09/26/2011
Points: 809
Re: Help with electrical problem??

I don't know your scoot and in particular not the controller in there, but I strongly assume the sparking is caused by a big pack of condensers that is usually sitting at the battery +/- terminals of the controller in order to even out the worst current spikes caused by the controller. The fuse is not meant to be switched on and off all the time, and it will eventually fail completely with all that sparking. New batteries, particularly lead types, take quite a few cycles to reach their full potential, so maybe nothing is wrong after all?


My rides:
QvR vR one: a Swiss package of pure understatement - innocent and to some eyes (from some angles) exceedingly ugly looks, but with raw and hardly containable electron power up to real 95 to 100km/h! And a literally rock-hard suspension due to a carrying capacity of twice it's unladen weight... Now converted to more controllable and efficient brushless motor and vector-contoller.

E-Sprit Fury (basis is the Erider Thunder 5000) since May 03, 2011. Highly moded - but now in active retirement

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.


High Voltage: The Fast Track to Plug In the Auto Industry A behind-the-scenes look at the robustly competitive race to dominate the market for electric cars.
Plug-in Hybrids: The Cars that will Recharge America
Stick it to OPEC - button
Green Metropolis: Why Living Smaller, Living Closer, and Driving Less Are the Keys to Sustainability
Build Your Own Electric Motorcycle
Transportation in a Climate-Constrained World

Who's new

  • Williammbrooks
  • james Moon
  • tcj
  • vx18650
  • eblade21
Customize This