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

Futaba FP-T6NFK Woes

Futaba FP-T6NFK Woes

Question: Mr. Doc- I have the Futaba FP-T6NFK transmitter and a Tactic TCB 100 ESC Rec/Gyro. I’m looking for a set of crystals and don’t know what it takes as far as single or dual …

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Slippin’ an HPI over a Tamiya

Slippin an HPI over a Tamiya

Question: Hiya, Doc- Do you know if the HPI107201 ’78 Trans Am has the proper wheelbase for a Tamiya TL01 chassis? I have had problems finding bodies that the wheels sit properly centered in the …

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New To RC – Is Nitro the Way To Go?

New To RC - Is Nitro the Way To Go?

Question: Hi Doc, I’m looking for a bit of advice. My 11 year old son wants a nitro RC car and we have been looking at the HPI Racing Trophy 3.5 RTR. What’s your advice …

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Setting Up My HPI Baja 5B

Setting Up My HPI Baja 5B

Question: Hey Doc, My name is Edzry and I live in Malaysia. Can you give me some tuning tips for racing my HPI Baja 5B on grass and hard-packed dirt. I would like a basic …

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Setting Up My LTO Dirt Oval

Setting Up My LTO Dirt Oval

Question: Doc, I have only been into racing RC Dirt Oval for 3 yrs. I started out with an OFNA Dirt Oval car but was tired of wearing out parts and tearing up diffs. I …

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Gimme Gimme Gimme More Speed!

Gimme Gimme Gimme More Speed!

Question: Hi Doc, I currently upgraded from Open Stock to Superstock 1/10 onroad with a 10.5 brushless sensor system along with a Orion R10 Pro speed control. I am urgently looking for assistance with setup …

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From Mad Monkey to Hot Little Monkey

From Mad Monkey to Hot Little Monkey

Question: Hey, Doc- I’ve recently bought an RTR Ansmann Mad Monkey. Initially it seemed to go bloody fast. On day 3 it still goes really fast but seems to overheat after about 2 minutes. I …

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Brushless Motor Confusion

Brushless Motor Confusion

Question: Hey, Doc- I currently own a Traxxas Rustler VXL and I love it (it is my first hobby-grade RC, mostly because I found this hobby at the old age of 26). So now I …

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How Do I Free Up My Ball … Cups?

How Do I Free Up My Ball ... Cups?

Question: Hey Doc, I was wondering…when building a kit it seems like the ball cups are super tight when I put them on the turnbuckles. Then when I go to adjust them while they are …

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Can I Upgrade the Duratrax Evader Slipper Assembly?

Can I Upgrade the Duratrax Evader Slipper Assembly?

Question: Hiya Doc. Is there an aftermarket slipper clutch set-up that will fit the Duratrax Evader brushless. Stock set-up is less than desireable. Thank you. Chad M. Answer: Hello Chad. The Duratrax Evader is a …

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Totally Tight Traxxas

Totally Tight Traxxas

Question: Hey Doc- So I have a Traxxas Slash 4WD that was built by a renowned racer. But now the drivetrain seems really tight and will not roll freely. What should I tear into first …

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What The Heck is Motor Timing?

What The Heck is Motor Timing?

Question: What’s up, Doc- I am new to the RC world. I have a 3Racing Sakura FGX, Yeah Racing 10T motor, Yeah Racing 35A Brainpower ESC and programming card. I’ve got the standard gear set-up …

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