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GY6 Engine, 150cc

To verify that this engine is compatible with your vehicle, select your model and come back to this listing. The listing will automatically give you compatibility information.


Special Order
Non-returnable
This product has an extended timeframe before shipping.

Ships approximately Mon July 1, 2019
Notice: We're currently experiencing difficulties with inventory tracking. If needed, please contact us for a manual check.
READ OUR SHIPPING POLICY
READ OUR RETURN POLICY


This engine fits most Chinese-built 150cc buggy and ATVs. This includes SUNL and ROKETA models as well.

Important! Read this listing fully


We don't accept returns on engines, so read this listing entirely! All frequently asked questions are answered here. If you have any additional questions please let us know before ordering.


Does your model have internal reverse?


This engine will work, but if you have an internal reverse engine, you will need a compatibility kit. Contact us for more information *before* ordering.


Note: It's a good idea to grab an extra exhaust gasket for the install.

We also offer performance GY6 engines!

If you're interested in more performance than a stock 150cc, take a look at this comparison:

Stock GY6 Hill Climb

BDX 184cc GY6 Hill Climb


  • 60 Day Parts Warranty
    Please read the Warranty details in the right-side column before purchasing.

  • No returns on engines.
    If you feel there is a problem with the engine, please contact us for warranty assistance. Do not return your engine, it will be refused and returned to you.

If you have the Crossfire 150R, this engine fits but is not Plug-n-Play. You will also need the engine conversion kit to make it a bolt-in installation.



Real 150cc (57.4mm Piston)Real 150cc (57.4mm Piston)Guaranteed to be a true 150cc
Recently many 125cc engines were pushed onto the market as "150" engines. Everything on those engines appears the same as the larger version, but the cylinder and piston inside are smaller. The engine you're looking at now has the 57.4mm bore, which is 149.75cc.

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



Large Valves for Higher Top-End PowerLarge Valves for Higher Top-End PowerArrives with Large Valves Installed
The large 27mm/24mm valves allow the engine to breathe better at high RPM, allowing for higher top speeds. This is a very noticeable improvement if your original engine came with the smaller 24/23 valves.



8-pole charging upgrade8-pole charging upgradeAlso includes STAGE 1 Electrical Upgrade
This engine comes from the factory with our S1 Electrical package, which generates more electrical power for lighting and charging the battery more rapidly.



Kick-Start Internals
Depending on which frame you have, you may be able to use the kickstart internals installed on this engine if there is enough frame clearance.

If you have a HOWHIT engine, you also need the correct exhaust mount adapter.

Other Differences
Our engines come with debris blocker on the inlet of the CVT, instead of the original boot shown in the picture. The original boot wasn't designed for dusty conditions and clogs quickly. This has (in our experience in speaking with many owners) lead to prematurely failed clutches and flat spotted rollers due to heat build up. Also, this engine does come with an intake inlet manifold, although none is shown in the picture.

Improved Debris Blocker installedImproved Debris Blocker installedIntake Manifold Inlet includedIntake Manifold Inlet included


IMPORTANT NOTES

No returns on engines.
Please do not return your engine. It will be refused and returned to you.

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.

If you have external reverse
This engine comes with the short transmission shaft common on Yerf Dog and Crossfire 150s. If you have reverse you'll need to install the correct reverse shaft into the transmission. You have a few options:

1. You can use the shaft from your original engine. (45 minute install, full instructions)
2. You can buy a new reverse shaft if yours is damaged. We carry the right shaft for your vehicle, ask us beforehand if you need help with this.
3. OR we'll install the shaft for you here before shipping the engine. You must buy this service to cover labor: Transmission Output Shaft Installation Charge

What's included:
Everything under the engine's covers and plastics is included and installed, this is a complete unit. Starter, stator, and intake manifold arrive bolted to engine. CVT transmission is fully assembled and cover installed. All transmission components are assembled and cover installed. All drain bolts and internal oil screen are installed. Valve cover installed.

Sold separately:
Carburetor, exhaust, ignition components and charging parts are all sold separately.

Remember to adjust valves after break-in period.

About Oil Coolers:
Our engines do NOT come with provisions for oil coolers, and never will. We've always advised strongly against the use of oil coolers on the GY6, and we refuse to offer them on our engines. 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. Coolers provide a false sense of longevity benefits, and the only proven result is the added risk of unexpected massive failure.

IMPORTANT INFO

  • Complete Engine & Transmission

  • High-flow 27/24 Valves

  • 57.4mm Bore

  • 8-Pole Stator

  • Internal reverse karts must use support kit

  • Item #377

SUPPORT VENDORS WHO
SUPPORT THE SPORT!

Your order helps fund future upgrades!

T@BD BUILT DIGITAL GY6 DYNO PROJECT
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REAL TESTING, TO SHARE REAL DATA

This project is funded 100% by your purchases.

Can you tell a good upgrade from snake oil? We'll test the parts and share the data, you decide!

HYDRAULIC BRAKE DYNO. NOT INERTIA! Allows us to find weak points and make precise engine improvements.
AFFORDABLE SINGLE CYLINDER FUEL INJECTION PROJECT
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KICK THE CARB!

Forget $400+ EFI Kits.

Developed right here in the USA by our owner! Finally, an EFI system that won't break the bank, with modern features way beyond the outdated and expensive kits from China.

- Wireless WiFi tuner BUILT IN! No cables or funky adapters from the 1980's.
- Tune with any device! Mobile, laptop, or desktop!
BUDGET-FRIENDLY BIG GY6 ENGINES
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GO FASTER, and SAVE MONEY


Quotes from some GY6 engine builders will make you crap your pants. Our R&D nails reliability without adding big costs.

· Affordable GY6 175cc big bore crate engines
· Custom GY6 hi-comp stroker pistons (up to 190cc)
RELIABLE STROKER BUILDS UP TO 190cc
R&D DONE RIGHT
189961e2-608e-47fc-ad6c-e811635f1b45.jpg
GOING STROKER? YOU NEED THIS PISTON

Made specifically for +2.2mm or +3mm stroker builds.

Our STR220 and STR300 GY6 stroker pistons RESOLVE the common causes of engine failure when using stroker crankshafts.

Machined right here in our shop. Use one to stroke your engine up to 190cc maximum without janky unreliable cylinder spacers!
HOMEGROWN AMERICAN WORK
AND INGENUITY
a04f840f-2f1b-4553-b547-31c5640f8baf.jpg
UPGRADES MADE IN USA - BUILT IN USA

Where do cheaper China parts outfits send your money?

We put your funds to work right here in the USA making these machines faster and stronger!
Thank you for your business!
JOIN OUR ADVICE FORUM!
8abd4b99-176f-40fe-9e72-3eda008842dd.jpg
GET ANSWERS YOU NEED

Don't spend more than you need to fix or upgrade your machine. Get accurate advice that will save you money and hassle. Read the rules, and join the conversation!
WARRANTY

Engine 60-day Limited Warranty

This engine comes with a 60 day warranty on parts. Any labor costs for installation or repair are not covered. This warranty covers parts only.

Conditions
The engine must be installed and repaired by someone of sound mechanical competence.

Exclusions
Expendable maintenance items are not covered, and include but are not limited to: drive belts, drive clutches, brake pads/shoes, vacuum or fuel lines, spark plug.

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