D
Deleted member 4366
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I had to repair a throttle on a bike where it had been shorted to 36v, so the hall sensor was blown. I thought I'd make a how to do it because it's a common problem.
All throttles are more or less the same whether thumb, half or full-width. There's a hall sensor inside with a magnet either side on the bit that you twist. The magnets are orientated the opposite way round, so at zero throttle, you have the low magnet against the sensor, and at full throttle, the high magnet is against it. If you take the magnets away, you get half-throttle.
Whichever type you have, you have to dismantle them to get to the sensor. After removing it from the handlebars, you'll see some barbs on the inside that stop it from coming apart. you need several screwdrivers to hold them all back at the same time. It helps if you can get a friend to wedge a screwdriver between the two parts and twists it to put pressure on the barbs, that way they stay lifted until you lift the last one and it'll pop apart. Before pulling it right out, make a note of where/how the spring is located.
Here's my one taken apart. The barbs are on that raised rim on the bottom part. The top part is the bit you twist. You can just see the two magnets connected by a strip of metal in the top part. Some don't have the metal strip:
The reason that you have to take it apart is that the hall sensor is under a little panel that you can't remove until the halves are separated.
All throttles are more or less the same whether thumb, half or full-width. There's a hall sensor inside with a magnet either side on the bit that you twist. The magnets are orientated the opposite way round, so at zero throttle, you have the low magnet against the sensor, and at full throttle, the high magnet is against it. If you take the magnets away, you get half-throttle.
Whichever type you have, you have to dismantle them to get to the sensor. After removing it from the handlebars, you'll see some barbs on the inside that stop it from coming apart. you need several screwdrivers to hold them all back at the same time. It helps if you can get a friend to wedge a screwdriver between the two parts and twists it to put pressure on the barbs, that way they stay lifted until you lift the last one and it'll pop apart. Before pulling it right out, make a note of where/how the spring is located.
Here's my one taken apart. The barbs are on that raised rim on the bottom part. The top part is the bit you twist. You can just see the two magnets connected by a strip of metal in the top part. Some don't have the metal strip:
The reason that you have to take it apart is that the hall sensor is under a little panel that you can't remove until the halves are separated.
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