RCScrapyard ► Iconic Vintage Radio Controlled (RC) Model Car Archive ► Yokomo MR4TC Custom,
RCScrapyard Radio Controlled Models
Flags

1/10 Scale Electric Rally/Touring Car:

Yokomo MR4TC Custom (Radio Controlled Model)


Navigation: Sitemap  >  Manufacturers  >  Yokomo

All Manufacturers: Model Types  >  On Road  >  1/10 Electric On Road

History, Info (and How To Set-up Tips) for the Yokomo MR4TC Custom:


  Introduced by Team Yokomo circa 2001, the 4WD MR4-TC Custom touring car was available in three kit options: Basic kit - MR4TC, or with Reedy Conquest motor and Novak ESC - MR4TCD, or with Reedy 15T motor, Novak ESC, Battery and charger - MR4TCD2.

  The model was based on the MR4-TC Pro and was belt driven, on a molded plastic chassis, with top deck, ball differentials, coil spring over oil filled dampers, universal joint drive-shafts and a full set of ball bearings.

Yokomo MR4TC Custom - 1:10 Electric Touring Car
▼ Scroll Down for More Images ▼


  To race the Yokomo MR4TC Custom, it requires a high level of tuning for improved stability when cornering, to keep it on the track and give you more grip under acceleration. Even the smallest change in your cars settings can make a Big difference. Our simple to follow instruction chart will show how to attain the best Set-up for your personal requirements.

  With simple to follow language, we can point you towards the correct Electric Motor for your MR4TC Custom and achieve the best Gearing, for your battery and motor combination.

  Learn the secrets the professionals have known for years to get the best from their Bearings using a number of simple tips. See how you can easily avert Radio interference, and the best way to safely Charge your Batteries, for improved acceleration and more run time.









Gas/Nitro Engines Body Shells Radio Transmitters etc Tires Wheels/Rims Electronic Speed Controllers Battery Packs / Chargers Electric Motors












Items For Sale:






Flags

★ Yokomo MR4TC Custom Chassis ★
Yokomo MR4TC Custom Chassis

★ Yokomo MR4TC Custom Chassis ★
Yokomo MR4TC Custom Chassis

★ Yokomo MR4TC Custom Chassis ★
Yokomo MR4TC Custom Chassis


Buying a Used Yokomo MR4TC
Touring Car (and What to look for)


   Buying a used Yokomo MR4TC Electric Touring Car, or any used RC Model, has a number of advantages. It is generally cheaper than new, ready built and may come with a variety of expensive hop-ups already installed. Cheap, pre-loved bargains are always becoming available. However, depending on the age of your purchase, it may need a little tender loving care before you can take it out on the road.

   The one thing you will always need is an instruction manual. If not supplied with your purchase, they can often be downloaded from the Yokomo website, or purchased separately on eBay. With an instruction manual, any problems with your model Touring Car you may discover can easily be fixed.

Dampers
   When you receive your used Yokomo Touring Car, make a general visual inspection of the chassis, front and rear wishbones, suspension shock towers etc, for any broken parts that may need to be replaced. Then, take a screwdriver and box spanner and check each self tapping screw and nut for security, taking care not to over tighten.

   Next, for those Yokomo models with oil filled shock absorbers, remove them from the chassis and dismantle the coil springs. The damper shafts should push in and pull out with a smooth action. If you feel a jolt as you change direction, this means the oil has leaked out and must be topped up. At the same time, change the O-Ring seals to prevent more leakage. Also check the damper shafts for damage. If they are scratched, change them as soon as possible.

   If the body shell of your Yokomo MR4TC is broken, ripped or damaged in any way, this can be easily repaired with rubber solution glue. Also, for added protection and if available for your MR4TC model, fit an under guard to stop dirt and gravel entering the chassis.

Titanium Turnbuckles
   Examine the drive shafts for wear and replace as required. If possible, change them for titanium. The steel shafts wear and bend too easily.

   If you intend to race your MR4TC Touring Car model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   Drive Belts need checking at regular intervals for wear, tension and damage. If deemed necessary, adjust the tensioning pulley until the belt can be depressed in the centre by no more than around 5mm. If the belt was slack, also examine the drive pulleys for wear. The teeth should provide a well seated fit for the belt teeth and not be rounded on the corners. If the belt teeth do not fit snugly, change the pulleys as soon as possible. For top level racing it may be prudent to replace all belts and pulleys after each race meeting.

Spur Gears
   Gears are a weakness on all Touring Car RC models. Head on collisions can easily damage the gear teeth on nylon and plastic spur gears. Heavy impacts can also loosen the nuts or self tapping screws that hold the Electric Motor in Position, allowing the pinion gear to pull out of mesh slightly and rip the tops off the teeth on your spur gear. To minimise this possibility, fit bolts with locking nuts to the Electric Motor mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Electric Touring Car racing, the plastic ball connectors should be checked and if deemed necessary changed after every meeting. A simple thing like a loose fitting connector popping off could easily end your race, so better safe than sorry.

Servo Gears
   The MR4TC steering servo is also prone to damage. In high speed crash situations, the fragile gear teeth of the servo can be broken off, rendering your expensive servo useless, so be sure to obtain a good quality "Servo Saver". Check out my Servo Information article.

   If body roll on your Yokomo MR4TC is a problem, handling can be improved with the use of stabilizers, anti roll or sway bars, stiffer tuning springs and, or, thicker silicone oil in the dampers.

Ball Bearings
   If your used Yokomo Touring Car comes with plastic and sintered brass bushings (ring type bearings), check the shafts that run in them for wear. Dust and grit can get into these bearings and abrade the shafts. Therefore, you should replace them all with shielded ball bearings. If the model has been run with ring type bearings, you may have to change all the axles and driveshafts. For more information, take a look at my article, How to get the best from your Bearings.

   Finally, good luck with your MR4TC model and good racing.


For More on how to Setup your Touring Car, check out my Hints and Tips page.


^ TOP ^












Manufacturers and Brands Catalogued and Listed by RC-Scrapyard.


   At present, the RC Model Manufacturers, Brands and Distributors covered by us are: ABC Hobby, Academy, Acme Racing, Agama Racing, Amewi, Ansmann Racing, ARRMA, Team Associated, Atomic RC, Axial, AYK, Bolink, BSD Racing, Capricorn, Carisma, Carson, Caster Racing, Cen, Corally, Custom Works, Durango, Duratrax, ECX - Electrix, Exceed RC, FG Modellsport, FS-Racing, FTX, Fujimi, Gmade, GS-Racing, Harm, HBX, Helion, Heng Long, Himoto Racing, Hirobo, Hitari, Hobao, Hong-Nor, Hot Bodies, HPI, HSP, Intech, Integy, Jamara, JQ Products, Kawada, Kyosho, Losi, LRP, Maisto, Mardave, Marui, Maverick, MCD Racing, Megatech, Mugen, New Bright, Nichimo, Nikko, Nkok, Ofna, Pro-Pulse, Protech, PTI, RC4WD, Redcat Racing, RJ-Speed, Robitronic, Schumacher, Seben, Serpent, Smartech, Sportwerks, Step-Up, Tamiya, Team-C Racing, Team Magic, Thunder Tiger, Tomy, Top Racing, Traxxas, Trinity, Tyco, Vaterra RC, Venom, VRX Racing, WLToys, X-Factory, Xmods, Xpress, Xray, XTM, Yankee RC, Yokomo, ZD Racing and Zipzaps.

   This is an ongoing project, with new and "lost in time" RC Model Brands being added as they are found and although most of those listed above have been covered in relative detail, some are still being researched and will be completed in the near future.


















Hints and Tips

Dampers

   Dampers, Shock Absorbers, Shocks call them what you will, they are one of the least understood, but most important tools you have for adjusting the handling characteristics of your RC model.

   In this article, I will endeavour to explain just what you can achieve by making simple tweaks to your shocks and how these tweaks can keep you ahead of your opposition on the track.

   In dictionary terms "Damper" is described as "A mechanical device to absorb the energy of sudden impulses." In plain language, they stop your car from bouncing all over the track.


So how do Dampers work?

   Basically what you have is a small amount of silicone oil contained in a sealed cylinder. Through the centre of that cylinder is a metal rod and on the end of that rod, a piston with a number of small holes in it. Pulling, or pushing the rod in and out of the cylinder, your will notice a certain amount of resistance as the oil is forced through the holes in the piston. To manipulate that resistance you have two options. You could use thicker or thinner oil, or change the size of the holes in the piston. So if you have thicker oil, or smaller holes, you have more resistance. Less viscous oil or larger holes, less resistance. This simple physical relationship, coupled with a good set of tuning springs, is all you need to set-up your car to beat the rest.

   Out on the race track, the main thing you want to avoid is your car bouncing around all over the place, sliding, or even rolling over when you negotiate a tight corner. To prevent this you need to make changes, but before you make those changes you need to consider what your problem is for that particular track. How your model reacts when cornering does it Under-steer? (Slide towards the outside of the corner) or Over-steer? (Turns towards the inside of the corner). Does it react differently when you exit the corner to how it did when you entered it?

   Once you have decided what your problem is, go to our "Set-Up" page linked below and follow the step by step instructions. But remember to only make ONE change at a time. If the first suggestion isn't enough to cure the problem, add the second and so on, until you find that perfect setting. Good luck and good racing.

For More Setup Information check out my Hints and Tips page.







Hints and Tips

Droop

   When you pick up your RC model car, the suspension arms naturally drop, this is termed as Droop and should be equal from side to side, but can vary from front to rear.

   Setting the amount of droop, or suspension movement, can dramatically change the handling of your car by limiting the transfer of weight from one side of the car to the other.

   Basically, increasing the droop at the rear of the car can improve cornering grip at the front and increasing droop at the front of the car, improve cornering grip at the rear. The amount of effectiveness of this setting does in general depend on a number of other setting factors your car may have to suit your personal driving style. Also, adding any droop will increase body roll.

   Off road models obviously have the need for more droop than On road cars, especially on bumpy tracks where a large amount of suspension movement is needed to simply keep the wheels on the track, or the car will become unstable and un-drivable. Lower droop settings for smoother, high grip tracks on the other hand can be advantageous, but don't overdo it.

   On road cars can achieve good results from small changes in droop, on tarmac and on carpet. In general they are also easier to adjust for droop than their off road cousins.

   Limiting the amount of droop can be achieved in a number of ways, but by far the easiest is more often seen as a standard setting option for On road cars and is achieved by simply turning a screw, located on the suspension arms, that comes up against the chassis.

   For Off road models and those On road cars that do not have the above option, droop can be set by positioning a specific length of plastic tube over the damper shaft, just below the piston this of course means stripping and rebuilding each damper with the new setting, which can be messy, especially in the middle of a field. Some of the top drivers used to get around this by simply having a number of different sets of shocks, with all the settings they might need, but for us mere mortals, this of course isn't a realistic option.

   If you are close to what you consider to be your optimum droop setting, you can fine tune this by simply screwing on or off the plastic ball connector at the end of the shock shaft. You could also have different length ball connectors that you could easily change.

For More Setup Information check out my Hints and Tips page.










On/Off Road
RC Models:

Radio
Equipment:

Accessories: