Please visit our new WPB site Here

 WPB Detroit Twin Exhaust
 A 170 Engine with 2WIN Exhausts
Its enough to drive a poor man insane with Desire!

What more could you possibly ask for?
WPB are setting the NEW Race Standards 
Click Images to Enlarge

Exclusive Features...
Stomp Detroit 170 Engine
17/14 Big Wheels
2WIN Twin Exhaust 
Say No More!

Are you Man Enough to Tame this?

Detroit 170 Engine
Decompression Cam
Dyno & Race Tested Latest Generation Engine
 MIKUNI Race Carb with 2 stage race foam filter
2WIN Systems Race Exhaust to Maximise Gas Flow
N1234 all up gearbox
Integrated External oil filter
High Capacity Race "rad" style oil cooler
4 Stroke kickstart 
Race CDI
High Capacity Race Ignition coil
Oversize Cam Sprocket and Chain
Exclusive Race Engineered Race Geometry 
New Stomp Detroit Plastic Body Kit
New HiTor SuperSwing Swingarm System
Swingarms includes provision for 
High Torsional strength wheel spacers
and SuperDry Sealed Wheel bearings
High Impact Lightweight Sumpguard
295mm 1000lbs piggyback nitrogen filled rear shock
735mm forks
SuperSwing Frames/Swingarms with 17/14 wheel upgrades
Replaceable Steel SuperShock Shock pivot bearings
 Wheels and Tyres 

14"Rear 17"Front MX Innova Pattern Tyres
SuperStrong and Light Steel Rims
SDG pattern SuperStrong Hubs
Recessed & Sealed SuperDry Long Life Wheel Bearings
SuperStop Wavey Discs 210mm front and 190mm rear
Single pot front and Rear wheel cylinder
Steel Braided Hose Lines
EBC pattern pads front and rear
KMC 420 pitch Chain
41 tooth rear sprocket
15t front sprocket
Wrap around SuperSlide Swingarm Chain Sliders
 Bars & Controls 
Titanium Alloy Minibike Pro Taper style Bars
Drop Forged Levers
Soft Grey SuperGrip Bar Grips
Foldback Gear Shifter
4 Stroke Kickstart

The New Exclusive Stomp Detroit 170

The Detroit is a BEAST Only those with ability to Tame this ANIMAL should purchase. We are not Joking!
You may find a modest detune is required during the PDI setup to "Run In" your New Detroit Engine. But no worries.

An engine developed to propel WPB Stomp and Demon Pitbikes into another Race Class. Things will never be the same again. The Detroit 170 will
push the boundaries and will tear up the Rule Books. As with any Revolution the Detroit 170cc will rattle the cage of the old Pitbike dinosaurs and no doubt some of them will not like moving beyond their comfort Zone.

But we dont Care, the Stomp Detroit 170 is here, its here to stay, and it will make its presence felt on the Race Tracks ... it will be the New Race Class Engine.

So Whats New?

Traditional Rocker

Answer No 1 - Roller Rockers

You may ask why hasn't anybody just increased the capacity of 
a pitbike engine more than 160cc ? The answer is technical but with the help of
our WPB Race engineers we 
will try to explain.
The Extra 10-15cc over a standard stock engine requires a major
engine head rethink, the valve springs have to be uprated a considerable
amount, this puts extra pressure on the cam and increases the drag on the engine
the effect is a diminishing return of power for the extra CC's added.
The Detroit 170 Cam followers have rollers fitted instead of metal pads, this greatly reduces friction and frees up huge chunks of Power.
Also the Detroit has an Aggressive cam profile, rapid valve opening requires steep cam profiles and that profile has to be followed exactly,without error.
The Roller Rockers of the Detroit together with the heavy weight valve springs
means that we are exclusively able to provide Pitbikes to customers with a factory
fitted 170 engine.

When you consider the aftermarket retrofit of converting
a 150cc or 160cc to a 170cc the costs are huge.
New Barrel, New Head, Gaskets Time and Labour 

Detroit 170 Customers will now be able to ride the biggest Engined Pitbikes 
in stock form.
No more expensive Retro Fit Head Conversions are Required.

 The Detroit 170 cc is Here and its putting that power down in the dirt,  
exactly where you want it, MORE POWER to get you those Race Wins. 

Answer No 2 - Uprated Valve Springs

As we mentioned earlier The Detroit 170  has an Aggressive cam
this cam profile needs to be followed accurately.
To do this the Valves springs have to be uprated considerably.

Answer No 2 - Uprated Aggressive Camshaft

The Detroit 170  has an Aggressive Cam, everything we mentioned
comes together around this camshaft. The Roller Rockers, The Uprated
Valve Springs and the Aggressive Cam Profile.
Detroit 170 provides Exclusive Factory fitted Stock POWER
No more Expensive After Market Tuning Required.