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Sakura S305 electric bike, no speed control

When out riding my bike {a Sakura S305}The motorstarted to speed up, even with throttle fully off,when i braked everything went dead.i have found a fuse blown in battery pack,when i replaced it all electrics came alive,but motor still goes full revs with no control with throttle control.please helpbill

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The Controller is goosed!! It\'s had water ingress & messed up the PCB. This is the same as some of these electric scooter\'s I had to fix years ago. One of them mysteriously came to life in 1 owner\'s kitchen in the middle of the night & went mental! It wasn\'t switched on or nothing & the owner just threw it into the garden to let it "do it\'s thing!". Replaced the controller & right as rain! The same can happen where it just goes to full throttle without revving/riding it. The controller was at fault on these occasions too! Hope this helps?

Ian @ On Yer\' Bike! M\'bro Bike Shops Middlesbrough Bike Repairs North East On Yer Bike...

Posted on Mar 18, 2014

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I'm not familiar with that make/model, but if it has a brushed motor then it is likely that you have a faulty controller module. Most brushed motors have just 2 wires running to them from the controller.

Posted on Oct 16, 2013


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