---------------------------------------------------------------------- YOU HAVE FIVE ENGINE OPTIONSTHE FIRST IS A 150CC ENGINE CUSTOMIZED FOR YOUR BUGGYGuaranteed Direct Bolt on FitCertified 150cc and not 125cc like some eBay engines12 month warranty $50 valueReverse Gear Box Shaft already install $65 value.  (if you don't have reverse this shaft allows you to install reverse later and will also work without a reverse gear box.--just use spacer)Customized just for your buggy. Rear mount bushing includedREAD WARNING BELOW ON CHEAP EBAY AND AMAZON ENGINES.  SOME OF THESE ENGINES ARE 125CC BEING SOLD AS 150CCADD A UNI-FILTER TO YOUR ORDER AND GET A ONE YEAR WARRANTY. YOU HAVE SIX ENGINE OPTIONS Engine 1: New certified true 150cc engine with Engine 2: Rebuild your current engine into a 175cc. Click here.  Send us your engine with our shipping plan. Engine 3: New 175cc GY6 Big Bore Engine.  This engine comes with the 62mm big bore cylinder and piston kit pictured below installed in a bored out case.  Performance transmission recommended--Click here. Regular price $249 - Now $99 if purchased with an engine.Engine 4: New 184cc GY6 PowerStroke Engine with stock transmission.   Comes with the 62mm big bore cylinder and piston kit installed in a bored out case and a 3.0mm high performance stroker crank.  Engine 5:  New Internal Reverse Engine for your buggy from 150cc to 175cc.  Bolt-on--no welding or fabricating.  All hardware to bolt on.  Click hereEngine 6: New 232cc GY6. This is an internal reverse engine and requires a compatibility kit in addition to either modification of your axle or a new axle.  See Engine.YOU HAVE SIX POWER PERFORMANCE OPTIONSOption 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.  See DetailsOption 2:  BDX High Performance Transmission:   If you add this option the parts will installed into your new engine.  See details.  Regular price $249, $99 with purchaseOption 3: A12 Cam Shaft. If you purchase the A12 Cam Shaft it will be installed and tested in your new 175cc 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 in your engine--Click Here.  The engine comes stock with an 8 pole stator.  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!  See details.  See our video: click here.Option 6: PowerPak:  The PowerPak includes all of the other options above, with the exception of the 11 pole stator.  Components will be installed into your engine (except A12 CS in stock engines).  It also includes additional roller weights and a 2000 RPM spring, performance CDI and coil.  Click here to see. ADDITIONAL IMPORTANT OPTIONS:Shipping Insurance:  We strongly recommend getting shipping insurance.    Also see extra packing below..  Click here for shipping insurance.Double Boxing and Double Padding Your Engine:  With this option we double box your engine in a second sturdy box and add extra 1 to 2 inches of styrofoam for extra protection.  Click here for double boxing.Read article on how displacement relates to more power.How big bore kits & strokers workTAKE A LOOK AT THIS COMPARISONStock GY6 Engine BDX Performance Engine We build and test our 175cc big bore 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 Piston62mm 175cc Big Bore KitBe sure to read the article on how displacement affects your power.Click here to see additional important information regarding this engine.Before purchasing an ebay engine, that could be a 125cc, let us rebuild your engine for $199 with a one year warranty!