FAQs | VRX RACING
FAQ
If you have any questions, you can refer to the following answers,
I believe they can answer your questions.
- Electric cars are powered by electric motor and battery. They are light weight with high torque, fast acceleration, and low inertia, easier to operate.
- Gas(nitro) cars are powered a mixtures of oil and fuel which normally can get from local hobby shops. The driving experience of nitro/gas RC cars is more outstanding, and the engine noise is loved by many players. But nitro cars players will need more skills on rc engine tuning as well.
1:5 scale: large size RC cars are suitable for outside use.
1:8 scale : Medium size, suitable for outdoor use.
1:10 scale: Medium-sized and small, suitable for large space indoor or outdoor use.
1:12 scale, 1:14 scale, 1:18 scale, smaller models, suitable for larger spaces indoors or outdoors.
1:24 scale or smaller size, matching indoor use.
- Crawlers: divided into two types: simulated climbing and powerful climbing, with strong off-road climbing capabilities.
- Monster truck: imitates the monster truck in reality, with powerful off-road and violent performance.
- Short course truck: Based on off-road racing design, suitable for complex offroad conditions.
- Rally car: designed based on real rally cars, suitable for drifting in squares or leveling land.
- Buggy: with excellent handling and jumping performance, commonly seen in international competitions.
- Truggy: Between buggy and monster trucks, it combines the characteristics of both.
- Touring car: Similar in appearance to a sports car, with strong flat road performance, suitable for on-road professional racing and square racing.
- Drift car: suitable for extreme drifting actions, with a cool appearance, suitable for players who like to modify cars.
- Mini cars: with a small sizes, suitable for professional tracks, and easy handling.
- Simulated container truck: appearance simulation, suitable for players who like to simulate vehicles.
- Construction vehicle: High cost, suitable for professional use.
- Brushed electric RC cars: lower cost, lower speed, higher strength, louder noise and short lifespan.
- Brushless electric cars: high cost, high efficiency, low power consumption, low noise, long life, super fast.
- Brushless car: about 60-70 km/h.
- Brushed car: about 20-30 km/h.
- Crawlers: about 10-20 km/h.
- Nitro car: about 50-70 km/h.
A: We recommend starting with a 1/10 scale entry-level model (e.g., an electric off-road buggy). Opt for an RTR (Ready-to-Run) version with a basic transmitter and charging kit - it's affordable and beginner-friendly.
RTR (Ready-to-Run): Fully pre-assembled, includes transmitter, battery, and charger - play right out of the box.
KIT (Rolling Chassis): For advanced users; allows custom motor, ESC, and electronics pairing.
A: Both have pros and cons:
Electric (brushless/brushed): Quiet, low-maintenance, ideal for urban/indoor use (~20min runtime).
Nitro: More powerful, longer runtime (1-2hrs), but noisy and requires regular engine maintenance.
A: Three effective methods:
- Upgrade to a high-KV brushless motor
- Install a larger spur gear (e.g., from 48T to 52T)
- Use higher-voltage batteries (e.g., 2S → 3S LiPo)
Note: Ensure proper heat dissipation and chassis reinforcement.
A: Troubleshoot step-by-step:
1. Check battery levels in the transmitter/receiver
2. Rebind the system (follow the manual's pairing steps)
3. Inspect motor/ESC wiring for loose connections
4. Power-cycle all electronics
5. Examine the drivetrain (pinion gear, spur gear, differential, drive cups)
6. If issues persist, contact customer support.
- LiPo (3300mAh): ~10-15 mins (varies with driving intensity)
- NiMH (1800mAh): ~10-12 mins
Tips: Minimize full-throttle use; turn off lights/fans.
7.2V 1800mAh NiMH: ~3-4 hours
7.4V 3300mAh LiPo: ~4 hours
1. Lowering shock absorber height
2. Adding weight blocks (e.g., front weights for climb stability)
3. Switching to low-CG tires (wide, soft compounds)
- Install dust covers to protect drivetrain
- Use low-temperature batteries (above -10°C)
- Clean and lubricate metal parts afterward to prevent rust.
- Remote Control Batteries
- Receiver power source
- Nitro fuel
- Glow igniter or starter box
○ 1/10 scale: 15-20% methanol
○ 1/8 scale: 20-25% methanol
(1) After fueling, cover the exhaust port, pull the puller a few times to get fuel into the engine.
(2) Ignition plugged into engine ignition and pull puller.
(3) Once the engine is started, remove the ignition.
Starting a nitro engine requires running several tanks of fuel at low to medium speeds to ensure proper piston and bushing position. Follow the specific engine manufacturer's instructions.
Improper commissioning
Clogged air filter
Insufficient fuel or clogged fuel lines
Check these components and tune the oil needles as needed.
- Lithium batteries: Avoid overcharging/overdischarging (single cell voltage should not be lower than 3.2V), and charge them to 3.8V/cell when storing for a long time.
- Nickel Hydride Battery: Fully discharged before charging to avoid the "memory effect".
Avoid storing the battery for a long time, check the battery and charge it regularly to avoid over-discharge.
1. Remove the shell of the vehicle, use a dry cloth to absorb the water;
2. wipe the electronic equipment (ESC, receiver) with anhydrous alcohol;
3. Let it dry for 24 hours and then test it under power.
- Remove the battery and store it separately
- Apply antirust oil to metal parts
- Shock absorbers are relieved of pressure to avoid long-term spring compression
A: Yes, you can upgrade components such as the motor, ESC, battery, tires, frame metal parts and bodywork to improve performance and durability.
Popular upgrades include switching to a brushless motor, upgrading to a higher capacity lithium battery, installing better tires, and adding aluminum or carbon fiber parts.
- Road: bald tyre (high grip)
- Gravel/Mud: studded tyres (deep grain drainage)
- Climbing: soft sponge tyre (enhanced traction)
- Adjust the shock spring preload (tighten clockwise to increase the stiffness).
A:
- Spot order: Shipped within 72 hours (3-7 days to arrive within China)
- Customised models: 20-30 working days (according to the number of orders to determine the time)
- International shipping: support DHL/FedEx, shipping costs are calculated according to the region (Europe and the United States usually 7-20 days)
A: Step-by-step troubleshooting.
If it is a electric car check:
(1) Check if the batteries on the car and the remote control batteries are charged;
(2) Check if the throttle rudder adjustment (TH.D/R) on the remote control is set to minimum;
(3) When the ESC is switched on, whether the indicator light is normal and whether it operates normally;
(4) When the power is on, check if the motor is working properly. If the motor is normal, check if the motor teeth are locked and if the motor is idling;
(5) Check whether the motor teeth, gear reduction teeth, and gear box gears are swept teeth (whether the gears have abnormal noise);
(6) Check whether the vehicle transmission from motor pinion gear to spur gear, from slipper system to front or rear differential, then to CVDs or dogbones is locked;
(7) If the remote control and the car are powered on normally, it may be that the remote control can not be connected to the receiver, and the customer needs to operate the remote control and the receiver according to the remote control instructions for the code.
If it is a fuel car check:
(1) Check whether the batteries of the remote control and the batteries for the receiver are charged;
(2) Check whether the throttle rudder volume adjustment (TH.D/R) on the remote control is set to minimum;
(3) Check engine gears, centre differential gears, and gearbox gears for swept teeth (gears for rattling);
(4) Check if the vehicle transmission catch cup is locked;
(5) If the remote control and the car are powered on normally, it may be that the remote control can not be connected with the receiver, and the customer needs to operate the remote control and the receiver according to the remote control manual.
If you still can't get the response after the above checking, please consult the customer service.
- Steering servo should connect to Channel 1 on the receiver.
- ESC must be plugged into Channel 2 on the receiver.
(1) Check whether the battery is charged; whether the ESC is energised;
(2) Check whether the steering servo is working properly, whether the servo has sweeping teeth and abnormal rattling sound;
(3) Check whether the steering rudder volume adjustment (ST.D/R) on the remote control is set to the minimum, so that the adjustment of the servo becomes 0.
(1) This may be due to a low battery, a worn motor or too much dirt in the drive train. Check and clean the car and charge or replace the batteries;
(2) Check the throttle rudder volume (TH.D/R) of the remote control. Adjust the throttle rudder level.
- Gears are too tight or jammed
- Using too high a voltage (e.g. 3S battery exceeds motor rating)
- Motor runs at full throttle for long periods of time
FAQ
If you have any questions, you can refer to the following answers, I believe they can answer your questions.
2. Q: What is the classification of RC Haruka? A: (1) Power is available: electric motor vehicle and oil motor vehicle. The power source of the electric motor is the power source of the electric motor. Appropriate purchaser, new purchase.
Fuel for use in oil-powered vehicles, fuel for use in oil-fueled vehicles, mixtures of oil and fuel for use in oil-powered vehicles, The feeling is even more exciting, and the voice of the engine has reached the joy of many players, and the flight time has increased, but the demand for fuel has increased.
(2) Proportional division:
1:5 proportion: Car type large size, suitable for outside use.
1:8 proportion : Medium size, suitable for external use.
1:10 proportion: Medium-sized and small, suitable for large space indoor or outdoor use.
1:12 proportional, 1:14 proportional, 1:18 proportional Car type: small and large; large space for indoor or outdoor use;
1:24 proportion, small car type, matching indoor use
(3) Usage scene and function classification:
Motorcycle: There are two types of racing vehicles, each with its own strength and the ability to drive in Koshino.
Large-legged car: A realistic monster car, with a powerful Koshino performance and violent performance.
Short route car: Basic Koshino car design, suitable for additional routes to Koshino.
Available vehicle control：Basically, the actual mobilization vehicle design, suitable for moving the land or flattening the land.
Koshino car: It has excellent handling, Japanese jumping platform performance, and is often seen in international competitions.
High-speed car: The special feature of both Koshino and Koshino cars.
Flat-crossing car: similar to the outside view, flat-road performance strength, matching industry ratio, and flat-road car.
Drifting far away car: A combination of unlimited drifting movement, a spectacular appearance, and a happy refurbished car playmaker.
Mosquito car: proportionally small, suitable for the workplace, operation and maintenance.
Product quality and quality of the vehicle: Appearance is true, and it is a pleasure to match the quality of the vehicle.
Engineering vehicle: Manufacturing enhancement, suitable for industrial use.
(4) Electrical machine type classification:
Printed electric machines: low production, high strength, loud noise, short lifespan, low demand.
Unprinted electric machine: Free of electricity, high efficiency, low power consumption, low noise, long life, but high quality.
A: We recommend starting with a 1/10 scale entry-level model (e.g., an electric off-road buggy). Opt for an RTR (Ready-to-Run) version with a basic transmitter and charging kit - it's affordable and beginner-friendly.
RTR (Ready-to-Run): Fully pre-assembled, includes transmitter, battery, and charger - play right out of the box.
KIT (Rolling Chassis): For advanced users; allows custom motor, ESC, and electronics pairing.
Electric (brushless/brushed): Quiet, low-maintenance, ideal for urban/indoor use (~20min runtime).
Nitro: More powerful, longer runtime (1-2hrs), but noisy and requires regular engine maintenance.
Three types of methods:
High quality KV free printing machine
Change to the main game (48T square to 52T)
High-voltage battery used (as in 2S to 3S battery)
Attention: Addition of demand to the heating and heating of the vehicle.
Check in order:
1. Check the battery level of the remote controller and receiver
2. Re-bind (refer to the binding steps in the manual)
3. Check whether the motor/ESC wiring is loose
4. Restart the electronic equipment
5. Check the vehicle transmission system (such as motor gears, reduction gears, driving gears, driven gears, transmission cups)
6. If you still can't get a response after the above checks, please contact customer service
Contact: Cindy Lee
Phone: 86-755-84152087
Email: info@vrx-racing.com
Address: 4th Floor, Building A6, Yinlong Industrial Zone, No. 292, Shenshan Road, Longdong Community, Longgang Street, Longgang District, Shenzhen, Guangdong, China