Saturday , 24 September 2022

Welcome to The RC Doctor, an area of CompetitionX dedicated to helping you diagnose and repair any RC car or truck problems. With over 20 years of RC experience, The RC Doctor provides expert advice on nearly all subjects related to RC cars and trucks. We can help you troubleshoot everything from faulty electronics to broken chassis/suspension parts and point you in the right direction on how to get it fixed. If you have an ailing RC, fill out the Ask The RC Doctor form on the right and let us help you diagnose your problem!

Recent Surgeries

Ansmann Royal Flash Has the Backwards Blues

Ansmann Royal Flash Has the Backwards Blues

Question: Hey Doc- I have an Ansmann Racing Royal Flash – when I switch the car on, motor starts to turn backwards without any throttle being used. I can adjust the throttle trim to stop …

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B4 Buggy Has a Slippery Rear End

B4 Buggy Has a Slippery Rear End

Question: RC Doc- I’ve been driving my Team Associated B4.2 Buggy for a while, self-teaching myself mechanics and such. What I can’t figure out is how to keep the back end from spinning out and …

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Bad Bugs Buggy Steering

Bad Bugs Buggy Steering

Question: Doctor- The steering in my HobbyKing Bad Bug is pretty sloppy. I watched an online review that stated I need to tighten the steering servo and use a little bit of threadlock to keep …

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Team Durango Turning Troubles

Team Durango Turning Troubles

Question: Hey Doc- I have a Team Durango DEX410v3 and having some issues with it turning. Our track is on a gymnasium floor that has carpet patches in the corners. On the straights its fine, …

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Hey LRP, Where’s My Reverse?

Hey LRP, Where's My Reverse?

Question: Hi Doc- I recently purchased a second hand car with the LRP IPC V6 ESC installed in it. My problem is that there is no reverse on the remote. I replaced the old remote …

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Wiper Speed Control Not Powering Motor

Wiper Speed Control Not Powering Motor

Question: Hey Doc- I have an older Tamiya Blackfoot that uses a wiper speed control. When I turn it on, the servo moves the wiper arm back and forth, but the truck doesn’t go anywhere. …

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Hobbywing V3 – Huh, Yeah, What is it Good For?

Hobbywing V3 - Huh, Yeah, What is it Good For?

Question: Hiya Doctor- Hi guys, great site!!!! I have certainly learned more about motors, ESC’s, Kv etc. while being here. My question is this: I recently purchased a Hobbywing V3 ESC – best buy ever! …

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HPI 5B AVC (or DBox-2)

HPI 5B AVC (or DBox-2)

Question: Hi Doc- Can I use a Spektrum DX2E and SRS4200 (AVC) Receiver on my HPI Baja 5B? I was thinking it might make it alot easier to drive. Thanks for your help! Kudin Answer: …

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DHK Wolf – Steering But No Motor

DHK Wolf - Steering But No Motor

Question: Hiya Doc- I have a DHK Wolf with a brushless motor and when I turn my car on, it recognizes the but the motor doesn’t respond. Do you think it’s the motor or the …

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Sticky HPI 5B Steering

Sticky HPI 5B Steering

Question: Hi Doctor- I have a HPI Baja 5B and am currently racing it in any race I can find. I have been having a problem with the steering returning to center. I have checked …

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Convert my Masito Rock Crawler to 9.6v

Convert my Masito Rock Crawler to 9.6v

Question: Hiya Doctor- I bought a brand new Maisto Rock Crawler not to long ago. I wired a 9.6v battery to it (like everyone is doing) and it worked fine right up to the point …

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Diff-icult Question

Diff-icult Question

Question: Hi Doctor- This question is about the Differential setup you have on your site: http://www.competitionx.com/rc-racing/rc-tuning-guide/rc-tuning-differential/. I’m running a Tamiya TA05R and I use it mostly for racing so speed is crucial. I also need …

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Tamiya RX7 Topping My HPI Sprint 2 – Will It Fit?

Tamiya RX7 Topping My HPI Sprint 2 - Will It Fit?

Question: Hey Doc, Would a Tamiya 51270 Mazda RX-7 Body fit on my HPI Sprint 2? I read somewhere that it will fit no problem, but upon doing a little research the Tamiya body is …

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Motor Turn Question

Motor Turn Question

Question: Hiya Doc- I just got back into R/C’s again and recently purchased the Duratrax Evader EXT2.4. I know its not the greatest truck in the world but it will handle a beating and it …

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