Z3 140


STOMP Z3 140 

17/14 wheels

£1199 Including Mainland UK Delivery

 STOMP Z3 140  Z-40 Race Report 

"STOMP Z3 140 2024 Featuring the Exclusive Z-40 race camshaft factory equipped engine, Beefed up Crank Cases and Needle Roller Gearbox Bearings. The Z-40 Race Camshaft is only fitted to Stomp and WPB engined bikes, no other UK Pitbike engine manufacturer fits this legendary camshaft to their engines and the 17Hp at rear wheel in Stock form is plenty to scare the Pants off the unsuspecting! "

The 2024 Z3-140 has been Upgraded to Now Include Polished Allow Hubs and

HSK Racing Brakes front and rear and Pro Footpegs. The New Detroit Plastics add something new

to the Race scene and are Unique to Stomp

The Z3-140 still boasts the ‘exclusive to Stomp’ SR140C/Z-40 cam engine. Stomp buy in the YX140 and then fettle the engine with stiffened valve springs & a high lift race cam (known as the z-40 cam). The result is 2 HP more than any other YX140 engine on the market. It might not be quite Zhongshen 155 territory, but its most of the way there and significantly cheaper to install than the Z155 which would see retail prices creeping over the £1200 mark. If you look after the Stomp 140 Z-40, it will prove a very reliable and cheap engine to run.

Stomp still retain the big wheel version (12/14) for those more into tight track who need that extra manoeuvrability.

Z-40 Race Camshaft

Factory Fitted and Race Tuned for Extra Brake Horse Power


17hp Dyno & Race Tested Latest Generation Engine

26mm Race Carb with 2 stage race foam filter

z40 Factory Fitted Race Camshaft giving Extra 2hp

N1234 all up gearbox

High Capacity Race CNC oil cooler

Race CDI

High Capacity Race Ignition coil


Titanium Alloy Minibike Pro Taper style Bars

Forged Alloy Levers

Soft Grey SuperGrip Bar grips

Foldback gear Shifter

Heavy Duty 16mm Kickstart Shaft

Pro Footpegs


Exclusive Race Engineered Race Geometry Frames

New HiTor SuperSwing TIG Swingarm System

Swingarms includes provision for 

High Torsional strength wheel spacers

SuperDry Sealed Wheel bearings

High Impact Lightweight Sumpguard

Race Engineered Rear Subframe 


Titanium Finished Anodise 735mm Forks

Drop Forged Titanium Anodised Triple Clamps

 Long Travel 290mm Rear Shock

Rear Swingarm 410mm

SuperSwing Frames Swingarms to take 17/14 wheel upgrades

Replaceable Steel SuperShock Shock pivot bearings


Titanium Alloy Minibike Pro Taper style Bars

Oversize Bar Pad with detachable cover

Optional Handguards available 


38mm Big Bore corrosion proofed pipe

 38mm Straight through Oval End Can

Spark Arrester

Alloy Exhaust bracket

Optional 2WINS twin exhaust upgrade


14/17 Inch Wheels

Innova Pattern Tyres for an allround

Grip and Performance

Allround Sealed Bearings

Matt Black Powder coated Rims


KMC 420 Chain

41T 16T


Hi Performance LockTab Rear Sprocket

Fully Sealed Hydraulic Disc Brakes Front and rear

High Performance Disc Pads


Steel Braided Hose Lines