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I stock many of the parts used in these Bike lighting projects, on my web store.
Here is the link to my web store page with bike lighting and P7 LED parts.
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Magic Shine light to Marwi mount adapters
New solderless design
The original design is show further down the page
 
This section is for the MS 900 type lights that look like this

Click on the images for a larger image
MS adapter and mounting bolt Another view showing the lock washer recess area
The Magic Shine adapter lets you adapt your MS light to use Marwi Helmet and New style Handlebar mounts
The mounting instructions are described below
Another view Another view showing the lock washer recess area at top right
First remove the original MS mount from the bottom of your light
There is a small screw that you remove and the mount comes right off
There may be a small rubber grommet under the Stock MS mount
You can snip this grommet off the power cord, it is not needed.
You will be replacing the stock mount with these parts
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Click on the images for a larger image
Bend the power cord to the right or left side, your choice.
Push the adapter up against the MS light body.
The wire lays in the half round channel in the adapter
Screw in the supplied screw.
See the image on the left
The Marwi slide mount comes with a Marwi Helmet or New style Handlebar mount.
So you will have to order a Helmet or Handlebar mount
You will also have to order The Marwi Mount kit
The Marwi mount kit is a Nylon bolt, 2 nylon nuts and 2 lock washers.
Hold the Marwi slide mount up to the MS adapter so the big holes line up
Slide in the 1/4-20 threaded Nylon bolt on the side that has the washer recess area
Slide a lock washer into the recessed area and push the bolt all the way through to the other side.
Put the other lock washer on the outside of the slide mount
Screw on the two nylon nuts
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Click on the images for a larger image
It should look like the MS900 light on the right when you are done

Starting on the left, the parts go together like this
Nut - Slide Mount - MS Adapter - Washer - Slide Mount - Nut

Now you can slide your MS light onto your Marwi Helmet or New style Handlebar mounts

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The section below is for the MS 1600 type lights that look like this


Click on the images for a larger image
The MS 1600 adapter on the right
Look at the MS 900 light instructions above
Both lights share the same basic instructions
First remove the original MS mount from the bottom of your light
There is a small screw that you remove and the mount comes right off
There may be a small rubber grommet under the Stock MS mount
You can snip this grommet off the power cord, it is not needed.
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Click on the images for a larger image
The bottom of the light looks like this with the original mount removed Mount the adapter to the light using the supplied screw.
The power cord exits out the rear through the slot.
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Click on the images for a larger image
Attach the slide mount to the light with a Marwi Mount kit It should look like the MS1600 light on the left when you are done

Starting on the left, the parts go together like this
Nut - Slide Mount - MS Adapter - Washer - Slide Mount - Nut

Now you can slide your MS light onto your Marwi Helmet or New style Handlebar mounts
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Original Magic Shine light to Marwi mount adapter
Original style where you have to unsolder and re-solder the power wire
This model is no longer for sale
 
Click on the images for a larger image
On the left, you can see the adapter attached to the bottom of the Magic Shine light.
It allows you to mount a Magic Shine bike light to a Marwi helmet or handlebar mount.
The Marwi mount shown above slides onto the helmet or handlebar mounts.
The adapter has a relief cut into it for a internal toothed lock washer.
The large Marwi mounting bolt and nuts shown above are made of Nylon.
I stock the Marwi mounts and Nylon pieces and lock washer on my web store.

Above right: Notice that I have cut a groove so that the power cord can come out and exit to either side through a groove.

In order to install this adapter on a Magic Shine light, you must disassemble the light.
The power cord must be unsoldered from the circuit board.
You push the power cord through the hole in the adapter and then into the inside of the light body.
Then you resolder the power cord to the circuit board.

The photo on the left above shows a recessed cap screw but I am using a button head screw like the one shown below.
The screw below has a low profile head and will clamp the adapter down way better than a cap screw







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Click on the images for a larger image
Here's a side shot of the Magic Shine light on a Marwi Handlebar mount and a Marwi helmet mount.
Note that this shot does not show the side exit groove that the current adapter has.
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Click on the images for a larger image
This shot shows the wire exit hole and the button head screw
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Click on the images for a larger image
A side shot of the adapter on a Marwi mount.
Note that you can make the power cord exit left or right in the groove.
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