VehiclesYokomo Super Dog Fighter Works'91 Team Spec

Yokomo Super Dog Fighter Works'91 Team Spec

Name: Yokomo Super Dog Fighter Works'91 Team Spec
Brand: Yokomo
SKU: YZ-W91TS

1/10 scale · buggy · YZ-W91TS

Yokomo's Super Dog Fighter Works'91 Team Spec is a 1/10 four-wheel-drive buggy kit with the motor and electronics supplied separately.

The kit pairs a 21T pinion with an 84T spur, and both gears use 48-pitch teeth. That gives a defined starting point for choosing a motor, while the final drive also depends on the belt-drive reduction. Tire diameter and the complete reduction still need confirming before estimating speed. Check the Team Spec supplement alongside the main manual when building the drivetrain.

Gearing Top speed

sourced

Sold without a motor, so there is no stock KV: compare gearing by rollout.

Yokomo Super Dog Fighter Works'91 Team Spec — Photo: Yokomo (opens in a new tab)

Specifications

Last modified Oct 1, 2026

Spec	Value	Basis
Vehicle
Class The kind of vehicle the maker sells it as. It sets what the car is built to do and which cars it is fair to compare it with. Buggies are low, light off-road cars built for jumps and fast corners on dirt, clay or turf tracks. The maker does not name a class for this one, so this is the site's judgment from its design. Drive All four wheels are driven. That gives more grip under power, especially on loose ground. The cost is more parts to maintain. Power Sold without a motor, so you choose the motor, ESC and battery yourself. Rows that depend on the motor say so. Build A kit you build yourself from parts. Most kits come without motor, ESC, servo, radio and battery, and many without tires or a painted body. The manual lists what to add. Scale The maker's nominal size compared with a full-size vehicle. It works more as a class label than a measurement. A 1/10 monster truck is far bigger than a 1/10 touring car, so compare length and weight for real size. Part number The maker's product number for this exact version. A V2, a new color, or a kit instead of an RTR usually has a different number, and parts can differ between them. Check it against your box or receipt before ordering parts.
Class	Buggyour call
Drive	4WD
Power	Motor not included
Build	Kit
Scale	1/10
Part number	YZ-W91TS
Drivetrain
Pinion The small gear on the motor shaft. Fewer teeth gear the car shorter: quicker acceleration, lower top speed and a cooler motor. More teeth do the opposite. On this car one tooth changes the gearing by about 4.8%. Racers change the pinion to suit the track and the class's motor rules, and often compare setups by rollout rather than tooth count. Spur The large gear the pinion drives. A bigger spur with the same pinion gears the car shorter. Pinion and spur must have the same pitch, or tooth size, to mesh. The Gearing parts table below shows this car's pitch and part numbers. Transmission & axle Every reduction after the spur, multiplied together: transmission, differentials and axle gears. It is fixed by the design; the gearing you change is the pinion and spur. Final drive How many times the motor turns for one turn of the wheels. A higher number is shorter gearing: more acceleration and pulling power, less top speed. Differentials The type of each differential, as the maker states it. A gear or ball diff lets the wheels on one axle turn at different speeds in a corner; a spool or locked diff turns them together for straight-line drive and climbing, at the cost of steering. Slipper clutch A slipper clutch sits on the spur gear and slips under a sudden load, a hard landing or full throttle on grip, to protect the gears. Set it too loose and it wastes power; too tight and it protects nothing.
Pinion	21TStock	Stock
Spur	84TStock	Stock
Transmission & axle	Not published
Final drive	Not published
Differentials	Gearfront and rearStock	Stock
Slipper clutch	YesStock	Stock
Wheels & tires
Tire diameter The outside diameter of the mounted tire, tread to tread. A taller tire covers more ground each turn, which gears the car taller. Race tires wear down over a day, and a smaller tire gears the car shorter.
Tire diameter	Not published
Suspension
Chassis What the main chassis is made of and how it is built, as stated for this car. Braces, stiffeners and skid plates are not counted. Carbon fiber is light and stiff, and costs more; edges can chip in a crash. Shocks, front What the shocks are and how they are built, as the maker describes them. Oil-filled shocks damp with silicone oil; friction shocks, found on some entry-level cars, damp with a sprung plunger and cannot be tuned with oil. Shocks, rear The same measure at the rear, which differs from the front on this car. Spring The stock springs, in the maker's own wording: a color, a rate or a length. A stiffer spring holds the car up and resists bottoming out; a softer one lets it squat and follow rough ground. Rates are not comparable across makers unless they state the same unit.
Chassis	Carbon fiber2.5 mm thickStock	Stock
Shocks, front	Oil-filledStock	Stock
Shocks, rear	Oil-filledaluminum bodyStock	Stock
Spring	YZ-FRSTW2 black spring setfront and rearStock	Stock
Power
Motor Motor KV is the RPM a motor turns per volt with no load. This vehicle comes without a motor, so there is no stock KV; it depends on the one you fit. Motor shaft The diameter of the motor's output shaft, which a pinion's bore must match. This vehicle comes without a motor, so it depends on the one you fit. Battery The highest LiPo cell count the maker rates the electronics for. This vehicle comes without electronics, so it depends on the ESC and motor you fit.
Motor	Not applicable
Motor shaft	Not applicable
Battery	Not applicable
Performance
Theoretical top speed It needs a motor KV, and this vehicle comes without a motor. Fit one and the calculator works it out from the motor's KV and the gearing.
Theoretical top speed	Not applicable

How to read these figures

Stock is as the vehicle ships.
Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart.
Not applicable means the vehicle does not come with it, like the motor on a roller or the tires on a race kit, or does not have one, like a KV rating on a brushed motor.
Not published means it exists but no source we could find prints it.

Gearing dimensions

Pinion and spur dimensions for the Yokomo Super Dog Fighter Works'91 Team Spec: fitted, and optional gearing supplied in the box
Component	Teeth	Pitch	Bore
Fitted at the factory
Pinion	21T	48P	Not published
Spur	84T	48P	Not applicable

About teeth, pitch and bore

Tooth counts are the ones in the specifications above.
Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close.
Bore is the pinion’s hole, listed separately from the motor shaft.

How these numbers were settled

The Team Spec supplement explicitly incorporates the Works'91 base manual.

Its bag contents include an 84T spur, and the base manual supplies the 21T pinion.
Both use 48-pitch teeth.
The Team Spec replaces the front drive pulley with a center one-way unit whose tooth count was not confirmed, so the internal and final-drive ratios remain unpublished here.
Stock tires are supplied, but their outer diameters were not found; the 2.2-inch tire labels describe the wheel size.
Motor and electronics are separate purchases.

Sources

Every figure on this page traces to one of these; where they disagreed, the note above says which was used and why. Links open in a new tab.

Show detailsHide details

Maker documents

Works'91 Team Spec supplement (Yokomo PDF) (opens in a new tab)teamyokomo.comPDFSupports 4 specificationsKit-specific changes; spur p. 2, shocks p. 5Used forMain specsGearingDrivetrainSuspension
Works'91 base instruction manual (Yokomo PDF) (opens in a new tab)teamyokomo.comPDFSupports 5 specificationsRead with Team Spec supplement; pinion p. 12Used forMain specsGearingMotor shaftDrivetrainSuspension

This vehicle

Yokomo Super Dog Fighter Works'91 Team Spec product page (opens in a new tab)teamyokomo.comProduct pageSupports 1 specificationUsed forMain specs

Parts and electronics

Yokomo BM-4821A pinion (opens in a new tab)teamyokomo.comPart pageSupports 2 specificationsUsed forMain specsGearing
Yokomo S4-SG84DA spur gear (opens in a new tab)teamyokomo.comPart pageSupports 2 specificationsUsed forMain specsGearing
YZ 002GW1 (opens in a new tab)teamyokomo.comPart pageSupports 1 specificationUsed forSuspension
YZ S4RW2 (opens in a new tab)teamyokomo.comPart pageSupports 1 specificationUsed forSuspension

Recorded components

Gear and shock identifiers recorded for this model. Each entry retains its configuration and sources.

Pinion

Fitted at the factory

BM-4821A (opens in a new tab)Yokomo

21T · 48P

Sources

Spur

Fitted at the factory

S4-SG84DA (opens in a new tab)Yokomo

84T · 48P

Sources

The parts bench

Start with the assembly.

Find drivetrain, suspension and steering parts first. Search any recorded part number, including hardware.

No parts collection yet

We have not collected a parts list for this exact model. Check the manufacturer documents in Details.

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