Dynamic Engine Factory

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Dynamic Engine Factory Dynamic Engine Factory

Performance Motocross Engine Parts and Services

D.E.F was founded by Matt Taylor who was recently working in the race industry under a few well known factories including: GEICO Factory Connection Honda, Pro Circuit, and ROCKSTAR Suzuki. Working closely with the riders he has achieved the high performance skills needed to develop top level race engines. Just a few Supercross/Motocross Pros D.E.F owner Matt Taylor has worked closely with in the past:
Eli Tomac
Justin Barcia
Justin Bogle
Kevin Windham
Jason Lawrence
Blake Wharton
Timmy Weigand
And many more...

D.E.F has also worked with high performance Trophy Karts, Go Karts and ATV's

Thanks for being patient. 🙏 Orders will go out asap! 📦 🛳️
10/20/2026

Thanks for being patient. 🙏 Orders will go out asap! 📦 🛳️

Updated inventory with a discount going on right now! Get them on the website! Fast Shipping! 💨 📦
10/19/2026

Updated inventory with a discount going on right now! Get them on the website! Fast Shipping! 💨 📦

CRF250R pistons and head work dialed in for these bikes. Pair this with a Vortex or GET ECU mapped and sold by us to com...
07/26/2026

CRF250R pistons and head work dialed in for these bikes. Pair this with a Vortex or GET ECU mapped and sold by us to complete the package. With some proper parts and tunes... these bikes can really come alive. 🚀

Call or email to get your head work sorted out. Can purchase pistons and ecus online. Ships fast. 📦

DEF-Racing.com

Yamaha Dual Injector Kits - In Stock! 📦 250s and 450s! All airbox/airboot options available.Send in your Vortex ECU for ...
07/22/2026

Yamaha Dual Injector Kits - In Stock! 📦

250s and 450s! All airbox/airboot options available.

Send in your Vortex ECU for a remap and free return shipping!

WWW.DEF-RACING.COM
Same day shipping!
Free tech support!
Dealer pricing available!
Lifetime warranty!

🎆 2019-2026 Yamaha YZ250F - Drop in high comp pistons back in stock, just in time to service your bike for Loretta’s and...
07/16/2026

🎆 2019-2026 Yamaha YZ250F - Drop in high comp pistons back in stock, just in time to service your bike for Loretta’s and all the other races going on! Safe for pump gas. ⛽️ Same day shipping here! 📦 🛳️ Easiest way to place an order is on our site: DEF-Racing.com

Shop phone is down! Please email us to get orders filled or answer any questions.
07/16/2026

Shop phone is down! Please email us to get orders filled or answer any questions.

04/27/2026
04/27/2026

Slacking on social media lately, but we are getting back to showing you all the different things we're into here! From Pro sx/mx engines, 3d printing parts, Drag race engines, custom cranks, cams, pistons, cylinders, big bore kits, stroker kits, machine work, electronics and dyno tuning. We are truly DYNAMIC!

We are adding products and services weekly to our site! Buy and shop online for premium products and services! www.DEF-Racing.com

dragrace

Order yours today at DEF-Racing.com 🛒📈We do our best to keep all these custom race parts in stock and ready for fast shi...
04/23/2026

Order yours today at DEF-Racing.com 🛒📈

We do our best to keep all these custom race parts in stock and ready for fast shipping. 📦 🚐

Thanks for everyone’s recent and past orders! We appreciate you!

03/09/2026

Everyone has been waiting for these. Now with an updated design and gas ports! We spent a ton of time developing this latest iteration and it's an absolute killer! Super durable, long life and great performance. 🔥 Thanks for everyone's patience! Get them on DEF-RACING.COM before they are gone!

Address

12900 US Highway 601. Appt Only, Call Or Email
Midland, NC
28107

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