Option 1: American made high performance Uni-Filter air filter ensures clean air to your engine and long life.  See why a NEW Uni-Filter is MANDATORY for ALL new engines and purchase at this link.   Your one year new engine warranty applies only if a new uni-filter is purchased with this engine.  If you don't get a Uni-Filter you are guaranteed to be putting dirt into your clean NEW engine.  Stock air filters do not effectively filter air and are the number one engine killer for GY6 engines.  Don't get an engine without one.  See Details

Option 2:  BDX High Performance Racing Transmission and Gates Powerlink Belt:  Click here to see detail or add to your order..  If you add this option the parts will installed into your new engine. A Performance Transmission is the difference between a sluggish, slow and inefficient go-kart and a peppy, speedy and powerful go-kart that utilizes the full power of the engine.  See details

Option 3: The BDX A12 Cam Shaft changes the power profile of your GY6 engine  to provide the optimal balance for both low end grunt and top end speed.  If you purchase the A12 Cam Shaft it will be installed and tested in your new engine.

Option 4: 11 Pole Stator, rectifier and harness adapter.  With this option you get more power to run your lights and other accessories.  If you get this option it will be installed and tested in your engine--Click Here.  The engine comes stock with an 8 pole stator.  A few small number of vehicles require an 11 pole stator.  Call before ordering if you.

Option 5: Performance Exhaust:  You can get the BDX performance exhaust for any of the engines above for an estimated 10% to 15% increase in raw power--see video!.  Your stock exhaust is restricting your power because the exhaust gases are being squeezed out through a tiny hole.  The BDX Performance Exhaust fixes that.  If you get a performance engine without the performance exhaust you will be restricting some of that NEW power. To see details or add the exhaust to your order click here.  Or see our video to see what this increased horsepower looks like in a race click here.

THE BDX PERFORMANCE TEAM MEMBERS ARE THE GY6 ENGINE EXPERTS IN THE USA.  BUILDING AND SHIPPING HUNDREDS OF GY6 PERFORMANCE RACING ENGINES FOR OVER 10 YEARS.  WE HAVE A FULL MACHINE SHOP IN VIRGINIA WITH AN ENGINE TECHNICIAN AND ENGINEER. SEE VIDEO 

Read article on how displacement relates to more power.
How big bore kits & strokers work

TAKE A LOOK AT THIS COMPARISON

Stock GY6 Engine

 

BDX Performance Racing Engine

 

We build and test our 175cc racing engine in our facility in Virginia.  

We disassemble your 150cc engine, bore the case to make it larger so that we can install a 62mm big bore piston and cylinder.  Then we re-assemble and test your engine.

Boring the Case for the 62mm Cylinder and Piston

62mm 175cc Big Bore Kit

Be sure to read the article on how displacement affects your power.

IMPORTANT NOTES

12 Month Warranty with Purchase of Uni-Filter
Please read the Warranty details in warranty section

Engine is shipped DRY with no oil.
Be sure to add 750ml of 10w40 to the crankcase and fill gearcase to the fill hole with 80w90 to the before starting.  There should already be gear oil in the gearcase but it is always safe to check.

Important

• Adjust valves after break-in period.

• Change oil after break-in period.

• Engine is shipped DRY with no oil. Be sure to add 750ml of 10w40 to the crankcase and 120ml of 80w90 to the gearcase before starting.

• Do not use synthetic oil in GY6 engines until after the break-in period.

• Install a uni-filter with new engine for longer life and better performance.  If you don't you are guaranteed to be putting dirt into your clean NEW engine.  Stock Chinese air filters do not effective filter air and are the number one engine killer for GY6 engines.

Guaranteed Fit - No returns on engines.
Before ordering please call and speak to our technician if you have any questions regarding fitment.  Please do not return your engine--call us if you ordered the wrong engine without consulting our technician. In the very rare event that there is a warranty issue please see warranty section.

About Oil Coolers:
Our engines Do NOT come with provisions for oil coolers. We've always advised strongly against the use of oil coolers on the GY6. We've seen too many instances where a cooler line bolt vibrated loose, dumping all of the engine oil and causing a massive failure.  The perceived benefit isn't worth the risk. Oil coolers on the GY6 solve a problem that doesn't exist. Follow regular maintenance intervals, invest in a UNI Air filter (and keep it oiled), and your new engine will last many years even decades--we've seen it many times. Coolers provide a false sense of longevity benefits, and the only proven result is the added risk of unexpected massive failure.

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