Thursday, July 18, 2019
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2015 OTK Kosmic with new Vortex ROK GP TaG engine package

2015 Kosmic Mercury Kart 125cc VortexGP
-SOLD! Sorry this kart has found a new home! If you are looking for a pre-owned OTK Tony Kart, Kosmic, Exprit or FA, please contact us for current inventory.
Ages 16 years and older

Chassis Type: 2015 Kosmic Mercury OK chassis- 30mm
ENGINE: 125cc Vortex ROKGP -brand new engine!
 All of our used karts come with used seats to fit at no charge. The sizes we have available in this category are from 50lbs through 180lbs.  For larger people, we do have Tillet Racing seats fitting drivers up to 260lbs at additional cost.
Bodywork: OTK Factory M-6 Bodywork.
Data: This kart comes with a MyChron4!
Axle Size: OTK 50mm racing axle comes standard.
Brakes: OTK Factory brake system 
Wheels: Comes with OTK MXJ Magnesium Wheels 
Special Features: Save on brand new with this almost new track ready kart.
Price as shown: $4,995.00
Or if you prefer a brand new version of this kart  pricing starts at $7,995.00
Updated 07.28.18

2015 OTK Kosmic Mercury with new Vortex GP 125cc TaG engine package.

We are still finishing this kart build, but wanted to get it advertised in case anyone is looking for a new/used package like this one. I guess we could advertise this kart in both the new and pre-owned sections as its half of each!
This is a used 2015 Kosmic Chassis with approximately half a season of racing (figure approx 6 races) and a brand-new Vortex ROK GP Engine package. We had this Kosmic chassis sitting here in the shop and figured it needed a new home, so we are building it up as a Vortex ROK GP (the popular 125cc two stroke TaG engine package). The chassis is all factory OTK, just pre-owned. The engine package is a brand-new Vortex GP. So the engine, all wiring, radiator...all brand hours for the new owner. Thus, save some money but forgo the headaches of a used engine. 

These Vortex ROK's are great! They are 125cc, two-stroke, water cooled, clutch driven single gear, electric start engines that run in both ROK Cup Challenge Races and TaG races around the world. They are one of the fastest single speed electric start engines developing 36hp with a 15000 RPM rev limit! These are nice, reliable, fast race engines! We listed the engine specs below. The chassis is all factory OTK!

Single-cylinder 2 stroke direct-drive engine

Displacement 125 cc

Reed valve intake in the crank case

Liquid-cooled through integrated water pump

Balance shaft

Integrated electrical starter

Centrifugal dry-clutch


One-piece exhaust power valve

Cast iron made cylinder CNC worked

5/3 transfer ducts intake

Oval exhaust and 2 boosters

Radial bearing C4

Bore and stroke 54.07x54mm

36 HP at 12.500 Rpm

Max Torque 20.2 Nm at 11.500 Rpm

Max 15.000 Rpm (electronically limited)

PVL digital ignition

Dell’Orto VHSH Ø 30mm carburettor

Arrow intake silencer

Dell’Orto fuel pump

Rok GP moulded exhaust with integrated exhaust silencer

Here at Kartspeed we custom build all our karts to meet the customer's requirements. Are you a shifter driver, TaG, Clone, or just want something to drive but have no idea where to start? Give us a call!

At Kartspeed we fit a seat to match each customers size (even for are XXXL drivers!). We create a custom manual for each kart with all the important items, as well as a short video of the kart running here in our shop before we box it up for shipping or ready it for customer pick up.

*We ship karts both Nationally and Internationally. Call us for a shipping quote. Are shipping rates are some of the lowest available due to the high volume of new and used karts we deliver to all parts of the world. Checkout the shipping details by clicking on the button on the home page.
*2018 OTK Karts are in stock. Do check with us for specific colors as not all colors are available all the time due to the build cycles at the factory. All models from Mini-Kid Kart through KZ Shifters! Complete packages or rolling chassis.