Stomp Z3-140 Big Wheel Pit Bike 2026
£1,199.00
or 3 payments of £399.66 with Klarna
Hurry, only 1 left in stock!
Off-road use only. Not road legal. Ride on private land with the landowner's permission. Read more
-
Description
2026 Stomp Z3-140 Big Wheel Pit Bike – Quick Overview
Best for: taller, confident riders wanting a larger 140cc manual pit bike.
Engine: oil-cooled YX140 four-stroke with Z40 race cam.
Power: 8.2kW at 8,000 RPM.
Gearbox: 4-speed manual, N-1-2-3-4.
Wheels: 17-inch front / 14-inch rear with SDG hubs.
Seat height: 865mm.
Ground clearance: 320mm.
Why riders choose it: larger wheels, taller riding position, strong 140cc performance and hydraulic disc brakes.
Our view: an excellent option for confident riders who want the performance of the standard Z3-140 but need a taller, larger-wheeled pit bike.
The 2026 Stomp Z3-140 Big Wheel is a 140cc manual petrol pit bike designed for riders who want strong four-stroke performance combined with a taller riding position and larger 17/14-inch wheels.
Powered by an oil-cooled YX140 engine with a Z40 race cam, the Z3-140 Big Wheel delivers 8.2kW at 8,000 RPM and 10.2Nm of torque at 7,500 RPM.
It shares much of its mechanical specification with the standard Z3-140, including the four-speed manual gearbox, lightweight steel spine frame, hydraulic disc brakes and 290mm piggyback rear shock.
The key difference is its larger wheel combination. With a 17-inch front wheel, 14-inch rear wheel, 865mm seat height and 320mm ground clearance, the Big Wheel offers a taller stance and increased clearance over uneven terrain.
For riders who find the standard 14/12-inch Z3-140 a little compact, the Big Wheel is a natural alternative without changing to a completely different engine or transmission.
My Take as a British MX Rider
The biggest reason I'd recommend the Z3-140 Big Wheel over the standard model is rider fit.
Both bikes have the same 140cc engine performance, but the larger 17/14-inch wheels make the Big Wheel feel more substantial, particularly for taller riders who might find a 14/12-inch pit bike cramped.
The 865mm seat height gives a taller riding position, while the extra ground clearance is useful when riding uneven off-road terrain.
I also like that Stomp has retained the YX140 engine, manual gearbox and hydraulic brakes. You're not sacrificing the familiar Z3 setup to gain the larger wheels.
If the rider is confident with a manual gearbox and physically suits the taller bike, I'd lean towards the Big Wheel over the standard Z3-140.
Helpful Pit Bike Buying Guides
Best Pit Bike for Beginners
Find the right first petrol pit bike. Pit Bikes for 8–10 Year Olds
Compare smaller progression bikes. Pit Bikes for 10–12 Year Olds
Explore options for developing riders. Stomp Pit Bikes
Browse the Stomp range. Manual Pit Bikes
Bikes for riders developing clutch control. All Pit Bikes
Shop the full Garland range.
Why Choose the Stomp Z3-140 Big Wheel?
The Big Wheel version takes the proven Z3-140 engine and chassis package and adds a larger 17/14-inch wheel setup, creating a taller bike for riders who need more room and ground clearance.
17/14-Inch Big Wheels
Larger wheels provide a taller stance and can help the bike roll over uneven off-road surfaces more smoothly.
865mm Seat Height
A taller riding position for riders who find smaller pit bike wheel combinations too compact.
YX140 Oil-Cooled Engine
140cc four-stroke engine with Z40 race cam, producing 8.2kW at 8,000 RPM.
4-Speed Manual Gearbox
Full manual clutch and gear selection for confident riders wanting direct control.
320mm Ground Clearance
An additional 40mm of clearance compared with the standard Z3-140.
Hydraulic Disc Brakes
210mm front and 180mm rear wavy discs provide responsive braking performance.
Stomp Z3-140 Standard vs Big Wheel: What's the Difference?
Both versions share the same YX140 engine and four-speed manual gearbox. The main differences are wheel size, seat height, ground clearance and weight.
Specification Z3-140 Standard Z3-140 Big Wheel Engine YX140, oil cooled YX140, oil cooled Power 8.2kW 8.2kW Gearbox 4-speed manual 4-speed manual Wheel Size 14/12-inch 17/14-inch Seat Height 820mm 865mm Ground Clearance 280mm 320mm Dry Weight 71kg 72kg Best For Riders who prefer a more compact pit bike Taller riders wanting larger wheels and increased clearance Choose the standard Z3-140 if the rider prefers a lower 820mm seat height and compact 14/12-inch wheel setup.
Choose the Z3-140 Big Wheel if the rider benefits from a taller 865mm seat height, larger 17/14-inch wheels and additional ground clearance.
Where Does the Z3-140 Big Wheel Fit in the Stomp Range?
Stomp Z3-140 Standard
140cc performance with compact 14/12-inch wheels.Stomp Z3-140 Big WheelStomp Z3R-140 Race
The same 140cc performance with taller 17/14-inch wheels.
A more race-focused chassis and suspension package.
Is the Stomp Z3-140 Big Wheel Right for Your Rider?
Choose the Big Wheel If...
- The rider is confident with manual petrol bikes
- The standard Z3-140 feels too compact
- You want 17/14-inch wheels
- The rider suits an 865mm seat height
- Additional ground clearance is useful
- You want strong 140cc performance for off-road riding
Consider a Smaller Bike If...
- The rider is new to petrol pit bikes
- They are still learning clutch control
- The 865mm seat height is too tall
- They struggle to manage a 72kg bike
- A smaller, lighter bike would provide a better fit
Stomp Z3-140 Big Wheel Rider Sizing Guide
Important: pit bikes should be selected by rider height, strength and experience rather than age alone.
The Z3-140 Big Wheel has an 865mm seat height and 72kg dry weight, making it best suited to confident riders who can safely manage its taller dimensions and 140cc manual engine.
Best For Taller, confident riders wanting a 140cc manual pit bike Experience Level Intermediate / experienced Seat Height 865mm / 86.5cm Dry Weight 72kg Wheel Size 17-inch front / 14-inch rear Ground Clearance 320mm For help choosing a suitable model, see our Best Pit Bike for Beginners UK guide or contact Garland Powersports for sizing advice.
YX140 Engine, Gearbox & Riding Performance
The Stomp Z3-140 Big Wheel uses a 140cc oil-cooled YX four-stroke engine with a Z40 race cam.
The engine produces 8.2kW at 8,000 RPM and 10.2Nm of torque at 7,500 RPM, matching the standard Z3-140's specified engine performance.
A 26mm carburettor, CDI ignition and kick-start system provide a straightforward mechanical setup.
The four-speed manual gearbox uses an N-1-2-3-4 shift pattern, allowing riders to control power delivery through the clutch and gear selection.
The larger wheels give the Big Wheel a different riding feel from the standard model, particularly over uneven surfaces, while retaining the same core engine and transmission specification.
What's in the Box?
- 2026 Stomp Z3-140 Big Wheel pit bike
- Components required for final assembly, as supplied by the manufacturer
When ordered boxed, the bike requires final assembly, mechanical setup and safety checks before riding.
Assembly should be carried out by a mechanically competent person. Always check engine oil, brakes, chain tension, controls, wheel fixings and other safety-critical components before use.
2026 Stomp Z3-140 Big Wheel Technical Specifications
Below are the supplied manufacturer specifications for the 2026 Stomp Z3-140 Big Wheel.
Engine & Transmission Manufacturer Stomp Model Z3-140 Big Wheel Engine YX140 with Z40 race cam, 4-stroke, oil cooled Valves SOHC, 2 valve Displacement 140.0cc Bore x Stroke 56 x 57mm Compression Ratio 9.8:1 Fuel System 26mm carburettor Maximum Power 8.2kW @ 8,000 RPM Maximum Torque 10.2Nm @ 7,500 RPM Clutch Wet, 5 disc Ignition CDI Starting Kick start Transmission 4-speed manual, N-1-2-3-4 Final Drive 420 chain Frame & Components Frame Lightweight steel spine frame Rear Subframe CRF70 subframe Swingarm 430mm steel Footpegs Upgraded PRO footpegs Handlebars New alloy fat bar Exhaust 32mm big bore Muffler Power bomb Suspension, Wheels & Brakes Front Suspension 735mm USD forks, non-adjustable Rear Suspension 290mm piggyback shock, adjustable preload Front Rim 17-inch steel rim with SDG hub Rear Rim 14-inch steel rim with SDG hub Rim Lock Rear Front Tyre 70/100-17 Rear Tyre 90/100-14 Front Brake Hydraulic, 210mm wavy disc Rear Brake Hydraulic, 180mm wavy disc Dimensions & Capacity Wheelbase 1240mm Ground Clearance 320mm Seat Height 865mm Dry Weight 72kg Fuel Capacity 5.5 litres Wheel Size 17/14 Packing Size 1560 x 380 x 735mm Warranty 6 months parts only
Warehouse Stock & Fast UK Delivery
Online-Only Specialist Pit Bike Retailer
Garland Powersports is an online-only UK retailer specialising in electric bikes, petrol pit bikes and youth off-road machines.
We offer UK-wide delivery on the Stomp pit bike range, with current availability shown on the product page.
Boxed delivery: the best-value option for customers who are comfortable arranging final assembly and mechanical checks.
Built and PDI checked: where offered at checkout, we can arrange for your pit bike to be assembled, checked and prepared before delivery.
Please check the available delivery options and estimated timescales at checkout.
Frequently Asked Questions
What is the difference between the Stomp Z3-140 and Z3-140 Big Wheel?
The standard Z3-140 uses 14/12-inch wheels with an 820mm seat height. The Big Wheel uses larger 17/14-inch wheels, increasing the seat height to 865mm and ground clearance to 320mm. Both share the same specified 140cc engine performance.
Is the Stomp Z3-140 Big Wheel suitable for beginners?
It is better suited to confident riders with previous petrol pit bike experience. Its 140cc manual engine, taller seat height and 72kg dry weight make it less suitable as a first bike for an inexperienced rider.
What engine does the 2026 Z3-140 Big Wheel use?
It uses an oil-cooled YX140 four-stroke engine with a Z40 race cam.
How much power does the Z3-140 Big Wheel produce?
The manufacturer specifies 8.2kW at 8,000 RPM and 10.2Nm of torque at 7,500 RPM.
Is the Stomp Z3-140 Big Wheel manual?
Yes. It uses a four-speed manual gearbox with a wet five-disc clutch and an N-1-2-3-4 shift pattern.
What size wheels does the Big Wheel have?
It has a 17-inch front wheel and 14-inch rear wheel with steel rims and SDG hubs.
What is the seat height?
The Stomp Z3-140 Big Wheel has an 865mm (86.5cm) seat height.
How much does the Z3-140 Big Wheel weigh?
The manufacturer's specified dry weight is 72kg.
What is the ground clearance?
The Big Wheel has 320mm of ground clearance, which is 40mm more than the standard Z3-140.
Does the Z3-140 Big Wheel have adjustable suspension?
The 290mm piggyback rear shock has adjustable preload. The 735mm upside-down front forks are non-adjustable.
Is the Stomp Z3-140 Big Wheel road legal?
No. It is an off-road pit bike and is not road registered. It should only be ridden where lawful permission and appropriate facilities are available.
Does the bike need assembly?
If ordered boxed, yes. Final assembly, setup and mechanical safety checks are required before riding. Built and PDI-checked options may be available at checkout.
What warranty does the Stomp Z3-140 Big Wheel have?
The manufacturer specifies a six-month parts-only warranty, subject to the applicable warranty terms.
Our Verdict
Choose the Stomp Z3-140 Big Wheel if the rider needs a taller 140cc manual pit bike with larger 17/14-inch wheels and increased ground clearance.
Choose the standard Z3-140 if a lower 820mm seat height and more compact 14/12-inch wheel setup would be a better fit.
Choose the Z3R-140 Race if you want a more race-focused chassis and suspension specification.
For taller, confident riders who want a proper 140cc manual pit bike, the 2026 Stomp Z3-140 Big Wheel offers a strong combination of engine performance, rider fit and off-road capability.
Related Pit Bike Guides
Best Pit Bike for Beginners
Compare suitable first petrol pit bikes. Pit Bikes for 8–10 Year Olds
Explore smaller progression options. Pit Bikes for 10–12 Year Olds
Find suitable step-up bikes. Stomp Pit Bikes
Browse the full Stomp range. Manual Pit Bikes
Compare clutch-operated petrol bikes. All Pit Bikes
Shop Garland's complete pit bike range.Ready to Choose the 2026 Stomp Z3-140 Big Wheel?
The Stomp Z3-140 Big Wheel combines a 140cc oil-cooled engine, four-speed manual gearbox, 17/14-inch wheels and an 865mm seat height in a capable off-road package.
Order online from Garland Powersports with UK-wide delivery available.
-
Delivery & Returns
FAQs
Questions, answered
Reviews