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Help upgrading a XXX-S to new electronics/brushless

Help upgrading a XXX-S to new electronics/brushless

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Old 03-02-2019, 05:02 PM
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Default Help upgrading a XXX-S to new electronics/brushless

New to the forums. First post!

I have an old XXX-S that has been sitting since the early 2000s. I used to race a XXX-T back in the day, but have been out of the loop for almost 2 decades. So I don't know what is what when it comes to good/bad brands or technology that is a must-have.

I dusted off my old XXX-S and have found some parts that it needs on ebay. The next step is to upgrade the electronics. It has an old JR XR2 AM transmitter and a brushed ESC. I have 2 JR servos that might work, but not sure about compatibility of the servos if I went with a new receiver. What's an inexpensive way to get this thing up-to-date for brushless? I've been looking at the Spektrum STX2 or the FlySky GT3C transmitters, decent for a budget build? Probably would want to run stock motor class if I decide to take it to a local track and see if I can compete with it and stick with the hobby, was thinking a Reedy Blackbox 600z and a 17.5T combo.

I also need to read up on Lipo batters, I have zero experience with them.

Thanks everyone!
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Old 03-08-2019, 03:43 AM
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I've done the exact thing you are talking about with the XXX-S sedan and can give you some pointers. The best aftermarket belts, the best lipo hard case batteries to use that fit in the XXXS chassis with minimal mods and how to comp for the weight difference, which good inexpensive serovs and radio gear to use and which to stay away from etc.

I do have a full ARTR XXXS roller + for sale as well as a pretty huge used parts lot listed. (see link below) I also some used esc and motor combos (both brushed and brushless) that would work really well for your build but feel free to hit me up for just the advice if wanted.


my XXXS listing; Team Losi XXXS Sedan
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Old 03-08-2019, 10:40 AM
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A xxx-s will need some chassis mods to inside of battery area.. use a Dremel tool with cut off wheel. and sand the rounded area to a good 90 degrees(B careful) dont use a free wheel or 1 way in front.I always like a strong servo to steer.
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Old 03-27-2019, 06:44 PM
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Hi Poppn9 and all,
Did a rebuild on a trade I did couple of years ago just to see it as a runner. Been up in the attic gathering dust. 21.5 Ballistic out of the pit box. Bought all the replacement parts off Ebay. Never will race it, probably never run it much. Just liked it and wanted to get it running again. It was it tough shape when I got it. O.K. now.

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