Fork Stem Riser & Adapter Mod for Dualtron Electric Kick Scooters
For owners of Dualtron electric kick scooters like the Dualtron MX, EX, DT2, Ultra, Raptor even up to current 2018 models (except for the Speedway). You can change the stock BMX type handlebar to accept a standard mountain bike stem and handlebar.
Because the stock BMX type handlebar and stem while it works well is quite limited in the ability to be adjusted to tailor fit riders who may be short (like me) or find themselves too close to the handlebars to comfortably deal with the torque during hard acceleration. Cyclists (particularly mountain bike riders) already have the option to choose various combinations of handlebars and stems for years and this mod will allow Dualtron owners the same versatility.
Prior to this, the most popular solution was to purchase a machined stem adapter or special BMX bar extenders. However, I found these were all quite expensive (SGD 65) and you still have to pay expensive shipping costs from SG to the Philippines.
Stem Adapters for Dualtron currently on the market
I did find a local source and while it worked well. I felt it could be still be improved because using a stem adapter addressed the ability the move the bar farther away from the deck but did not address the height difference as using one put the handlebar quite low which might be disconcerting for taller riders.
To address this I took a caliper and measured the adapter I needed and scoured the internet for a possible substitute.
This leads me to find this particular accessory used for mountain bikes.
Pro Fork Stem Riser Extender from Aliexpress
I took a chance and ordered it for US$11 including shipping which took nearly 30 days to arrive. I figured it was an acceptable amount of money to find out if it can meet the requirement.
Upon arrival, I immediately went to work and removed my current handlebar/stem setup (Kore Mountain Bike stem, ITM riser MTB handlebar & locally sourced stem adapter).
The first issue is that the side that goes into the DT stem did not fit. I fixed it easily by grinding the edge using a Dremel tool (5 minutes).
Dremel tool used to reduce the diameter so it will fit the DT stem.
I then re-assembled it and installed it by pushing it down the DT stem hole so that the expanding collar goes all the way in and part of the aluminum body with the black spacers will protrude where you can attach a standard MTB stem of your choice of length and degree of rise/dip one wants. (I use a Kore 80mm length w/6-degree rise).
Fork Stem riser going into the DT Stem hole.
At this point, I can already set the height I want and lock the unit down but I wanted to address the esthetics to make it better looking. I, therefore, went to nearby bike shops and sourced some spacers like this for P200.00
Carbon spacers with varying heights
I then selected the spacer I wanted to put it in between the mountain bike stem and the DT stem. It enabled me to easily set a height for the fork riser and make it flush to the existing DT stem
Carbon Spacer used to fix the height before locking down.
After this, all you need is to tighten the top bolt to secure it. Tightening the top bolt will make the expanding collar in the unit to grasp the inside of the DT stem firmly and no longer need bolts.
Tighten the bolt for stem riser expanding collar to lock it in place.
So that’s basically it. The fork riser cost less than P 600.00 and the carbon spacers P 200.00. You can source your own Mountain Bike stem/handlebars from various bike shops and make your DT fit you better.