STOMP RACING Z3-140CC RACE SPEC PIT BIKE 2025 MODEL

5.0 (1 customer reviews)

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SKU: SR-STOMP-RACI-5566

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Brand: Surron

$1121.64

In Stock

Performance Highlights

Motor Output: 2Hp More Than Any Other Yx140 Engine On The Market

Product Overview

The Z3R-140 is the ultimate budget race bike from the Stomp stable. This bike boasts the upgraded SDG2 frame and the Detroit plastics, as well as the suspension from its podium-winning predecessor. The best 140 pit bike out there.
The Z3R-140 still boasts the ‘exclusive to Stomp’ SR140C Z40 cam engine. Stomp buy in the YX140 and then fettle the engine with stiffened valve springs & a high lift race cam (known as the Z40 cam). The result is 2hp more than any other YX140 engine on the market.
ENGINE
Stomp Racing SR140C Z40 race cam
GEARBOX
Start-in-gear, all-up 4 speed gearbox
HORSEPOWER
14hp at rear wheel
CARB
26mm race carb with double foam filter
CASES
Aluminium shot blast finished cases with Stomp logo
COOLER
CNC oil cooler with braided steel hoses
FRAME
SDG2 heavy duty cradle frame for ultimate stiffness and control
SUBFRAME
Removable rear subframe & bolt on engine hangers
BASH PLATE
Alloy sump guard / bash plate
SWINGARM
410mm alloy swing arm
FORKS
SP 735mm cnc machined usd fully adjustable oil filled forks
CLAMPS
Drop forged black anodised triple clamps (yokes)
SHOCK
DNM nitrogen filled 290mm piggy back shock
WHEELS
14/12 sdg with steel rims for strength
RIM LOCK
In rear wheel
TYRES
Kenda
CYLINDERS AND CALIPERS
Improved and revised light-weight brake master
ROTORS
Vented light-weight rotors
FEATURES
Brake snake to protect the rear brake pedal
MUFFLER
Alloy oval exhaust muffler
RACE PIPE
Mandrill bent big bore 32mm OD race pipe
FEATURES
Features full length alloy heat shield for style and protection
BARS
Pro-taper style minibike bars
GRIPS
Renthal style soft rubber grips
LEVERS
Forged alloy clutch & brake levers
SIDE CASES
Stomp logo cnc machined engine side cases
CHAIN
420 KMC chain with engraved alloy/nylon chain guide
REAR SPROCKET
420 41t lightweight durable
FRONT SPROCKET
420 16t
GEAR SELECTOR
Fold back gear selector
FOOTPEGS
NEW upgraded PRO
FUEL TANK
NEW reinforced poly resin 5.5 ltr fuel tank with alloy cnc filler cap
SEAT
NEW revised firmer with Stomp logo
PLASTICS
NEW Detroit hi impact polypropylene
BOARD
Wrap around crf number board with front brake pipe tidy
GRAPHICS
New Stomp race graphics kit with Stomp race sponsor’s logos
SEAT HEIGHT
82cm
WEIGHT
71kg
WEIGHT LIMIT
15 stone

Technical Specifications

Brand	Surron
SKU Identifier	SR-STOMP-RACI-5566
Motor Architecture	2Hp More Than Any Other Yx140 Engine On The Market
Warranty Term	2 Years Limited Warranty

5.0

Based on 1 verified rider reviews

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Customer Reviews

Sarah

Verified Owner

Oct 05, 2026

Rugged and reliable

Took it out on rocky singletracks this weekend and it took all the abuse with ease. High-quality craftsmanship throughout.

Surron Freight & Warranty Guarantee

Shipping Policies

E-bikes ship with specialized heavy freight ground carriers in custom reinforced double-walled protective cartons. Delivery typically completes in 3–5 business days. Free shipping applies automatically to all orders over $500.

2-Year Limited Warranty

Surron electric bikes carry an extensive 2-year warranty covering frame integrity, motor internals, and electronic controllers against manufacturing defects. Battery packs are guaranteed to retain at least 70% capacity through 500 charge cycles.

Component Synergies