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1/16 Scale Nitro Truck/Truggy:

Kyosho Mini Inferno ST 09 - 31312 (Radio Controlled Model Review)


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History, Info (and How To Set-up Tips) for the Kyosho Mini Inferno ST 09:


  Released by Kyosho in 2007, the 4WD Half8 Mini Inferno ST 09 GP ReadySet Stadium Truck - # 31312 - was also available in an ARR kit - # 31312AR.

  The model is shaft driven, on a alloy plate chassis, with gear type differentials, coil spring over oil filled dampers, dogbone drive-shafts, a full set of ball bearings and a SIRIO 09 engine.

Kyosho Mini Inferno ST 09
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  To race the Kyosho Mini Inferno ST 09, it requires time and patience, to tune and adjust for improvements in handling and steering ability and to get the grip you need to stay on course when manoeuvring around tight, slippery corners. A little can be a lot when it comes to changing your cars settings and our easy methodical directions will guide you to the best Set-up to help you win and keep you winning.

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★ Kyosho Half8 Mini Inferno ST 09 Chassis ★
Kyosho Half8 Mini Inferno ST 09

★ Kyosho Half8 Mini Inferno ST 09 Chassis ★
Kyosho Half8 Mini Inferno ST 09 Chassis


Buying a Used Kyosho Mini Inferno ST Truck (and What to look for)


   Buying a used Kyosho Mini Inferno ST Nitro Truck, 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 back yard.

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

Dampers
   When you receive your used Kyosho Truck, 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 Kyosho 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 Kyosho Mini Inferno ST 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 Mini Inferno ST 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 Mini Inferno ST Truck model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   The gearbox of your used Truck should be opened up to check for gear wear and lubrication. A thin coat of grease is often used on internal gears and although this is fine for basic running around on the back yard, if you intend to race your Truck at a higher level, this should be removed and replaced with racing oil (ZX1 or Teflon Oil). Of course, this should be reapplied after each race meeting.

Spur Gears
   Gears are a weakness on all Truck 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 Nitro Engine 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 Nitro Engine mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Nitro Truck 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 Mini Inferno ST 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 Kyosho Mini Inferno ST 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 Kyosho Truck 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 Mini Inferno ST model and good racing.


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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

Aerodynamics

   It is commonly understood that weight improves traction. If you have ever seen TV coverage of any kind of full size motor racing, you will have heard the terms, aerodynamics and down force. Well, they also relate to small scale models in exactly the same manner.

   Bodyshell aerodynamics for RC model cars is a science in itself and the wrong one could loose you the race. Back in my day the shell to have for 1:10 on-road, was the Alfa Romeo 156. The bodyshell that came with the car kit was a Peugeot 406, but that soon went into the bin when I got the Alfa. The difference in performance was amazing, but it wasn't a patch on the Frewer, Ferrari F50. The rear wing on that bodyshell was phenomenal; it was the fastest thing on the track, great for club racing, but to my cost, illegal for top level racing. Regulations stipulate that the rear wing should be no higher than the roof of the car, the Frewer wing was way too high, so another one was relegated to the "do not use" box.

   Off-Road models also benefit from aerodynamics and down force, but to a lesser degree than on-road models. The rear wing provides good down force for improved traction on dirt tracks and is discussed in detail in one of my other articles.

   Way back in 1994, a company named Tenth Technology produced a 1:10 buggy called the Predator. The design of the car was innovative to say the least, with inboard laydown cantilever operated shocks and extra low, almost flat bodyshell. The most eye-catching element of the design was the wings. Not only did it have a nice large wing on the rear, it also had one of a similar size at the front. It was one of those cars where the idea seemed good and the car was fast very fast and did once win the British Championship. The problem was its fragility. Any small knock damaging the front wing, made it un-drivable.

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







Hints and Tips

Maintain your Fuel System

   Nitro engines need a regulated constant supply of fuel to run efficiently. If this supply is restricted or contaminated in any way, the engine will show problems in a number of ways.

   If your engine is running hotter than normal, begins to stutter, has trouble idling or won't even start, your first instinct would be that it is running lean, but when you try to make adjustments, it has no effect. The reasons for your problem could be a number of things, but the most likely is a fuel or fuel line problem.

   First of all visually inspect the fuel system. Check the fuel line for any kinks or tight bends that could restrict free flow. If you do find any kinks or any damage to the line, I would recommend changing it rather than trying to simply straighten it out or repairing it in any way. Any leaks you find in the system must be dealt with, if you can, replace the parts.

   If the line looks okay, disconnect it and check for any blockages. Clean and flush it out if you can, or if necessary replace it. If your system has a fuel filter, clean or replace it.

   Check the fuel tank. If the fuel cap or the tank has been damaged in some way, this could allow contamination or debris to enter the system. If damage is found, don't risk it, change the tank.

   If the tank looks undamaged, drain it and refill with fuel. However, before you do this, check your manual to make sure that you are using the right type of fuel for your engine. If in any doubt, don't be afraid to ask someone.

   Make sure the fuel line is the correct size. If too small, it will not be capable of supplying the amount of fuel the engine requires. If the line is too large it could be impossible to reduce the flow enough for the engines needs and be constantly running rich.

   Second hand engines can often have had changes made by the previous owner that could be causing your problems. If after carrying out all the recommendations in this article, check the manufacturers' website for any details on recommended fuel and fuel system.

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










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