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Professional Motorcycle & ATV Service

We Don't Just Build Race Bikes. We Build Results.

Engine rebuilding, cylinder-head service, ECU reprogramming, Keihin FCR-MX carburetor modification and complete motorcycle and ATV race preparation. Bring your next project to Tokyomods.

Explore Our Services Discuss Your Build

From the Shop to the Starting Line

Experience Behind Every Build

Founded by former factory mechanic Ron Wood, Tokyomods combines decades of factory racing, engine building and race-bike preparation experience with performance solutions for motocross, supercross, desert, off-road, supermoto and sport ATV applications.

Whether you need dependable stock performance, better throttle response, improved rideability or a complete competition build, our goal is the same: deliver the right combination of power, reliability and performance for your motorcycle, riding application and budget.

Need Engine Work?

Explore two-stroke and four-stroke rebuilding, top-end service, crankshaft work, cylinder-head service and custom performance packages.

View Engine Services

The Work Behind the Performance

Tokyomods Services

Choose a service below to learn more and open the appropriate service form.

Disassembled carburetor and components arranged for Tokyomods carburetor service

Carburetor Service

Tokyomods Carb Mod

$299.95 Carburetor modification service

Tokyomods created the Carburetor Modification to improve performance on your motocross or off-road machine. Your carburetor is disassembled, cleaned and inspected, with new gaskets, replacement of worn parts and our signature jetting.

If your bike has running issues or you're looking for better performance, start with the Carb Form. Optional accessory kits and vent hoses are available to complete the setup.

Additional parts may be required; see the form for pricing and options.

Open Carb Form
Tokyomods ECU with fuel and ignition mapping software in the background

Fuel & Ignition

ECU Reprogramming

$199.95 Stock or Vortex ECU reprogramming

Exhaust purchase offer: Purchase an FMF or Yoshimura exhaust from Tokyomods and get ECU reprogramming for $100.

Tokyomods provides fuel and ignition mapping for motocross, supercross, ATV and supermoto applications. Use the ECU Form to specify your bike, exhaust, fuel, modifications and the type of power delivery you're looking for.

Fill out the form and send your ECU to us. We reprogram it and ship it back out to you the next day.

Open ECU Form
Motorcycle cylinder head with valves, springs and valve-train components

Precision Cylinder-Head Work

Cylinder Head Service

From stock rebuilding to complete race-head packages, our services include:

  • Complete race-head packages
  • Cylinder-head surfacing and porting
  • Head rebuilding with OEM, stainless-steel or titanium valves
  • Valve-guide replacement
  • Valve-seat cutting for standard or oversize valves
  • Valve-seat replacement with MoldStar 90 seat material

Cylinder heads are disassembled, cleaned and inspected before the required machine work and replacement components are determined. We use Serdi valve equipment for precision valve-seat work.

Use the Valve Shim Calculator

Open Head Service Form
Engine cases, clutch and transmission components during engine service

Stock Rebuilds to Race Engines

Engine Builds & Rebuilding

Our engine packages are built around your motorcycle, intended use and budget. From a stock rebuild to a complete competition engine, we'll help you choose a package that fits your goals.

  • AMA Pro MX/SX-level race-engine packages
  • Big-bore and stroker engine packages
  • Top-end and complete race-engine packages
  • Stock engine rebuilding
  • Two-stroke and four-stroke engine service

Engines are inspected after arrival. We'll contact you with a detailed estimate and expected completion time before proceeding.

Explore Engine Services Open Service Form

Complete Service Capabilities

From Engine Work to Race Prep

Explore the service lists below, or contact us to discuss the work your motorcycle or ATV needs.

Four-Stroke Engine Services
  • Complete race-engine packages
  • Cylinder-head porting and rebuilding
  • Cylinder-head surfacing
  • Valve-guide installation
  • MoldStar 90 valve-seat installation
  • Valve-seat cutting
  • Cylinder surfacing and honing
  • Race and stock crankshaft rebuilding
  • Top-end rebuilding
  • Case splitting, cleaning, inspection and reassembly
  • Throttle-body modification
  • Throttle-body and fuel-injector cleaning
  • Carburetor modification and rebuilding

See the complete Tokyomods engine program

Two-Stroke Engine Services
  • Top-end rebuilding
  • Engine pressure testing
  • Case splitting, cleaning and reassembly
  • Cylinder honing
  • Crankshaft rebuilding
  • REM transmission-parts finishing
  • Carburetor rebuilding
Race Prep & Bike Services
  • Complete bike prep for motocross, supercross and supermoto
  • Race prep, lubrication and service of the swingarm pivot, shock linkage, steering stem, front and rear axles, and controls
  • Oil changes, spoke checks and adjustments, nut-and-bolt checks, grip safety wiring and air-filter service
  • Valve-clearance checks and adjustments
  • Engine leak-down and compression testing
  • Basic service: engine oil and filter, air-filter cleaning and oiling, chain cleaning, lubrication and adjustment, and spoke checks
  • Mini-bike carburetor rebuilding
  • Brake bleeding and brake-fluid flushing
  • Tire changes
  • Front-to-back diagnosis and repair estimates
  • Radiator cleaning, servicing and repair
  • Bike washing and detailing
Discuss Bike Service

Get Your Project Started

Choose Your Service Form

Have your bike's year, make and model ready, along with its current modifications and the work you'd like performed.

Carburetor

Carb modification, rebuilding and available accessories.

Open Carb Form

ECU Reprogramming

Fuel, ignition, exhaust and power-delivery details for your ECU.

Open ECU Form

Engine & Component Service

Engine, cylinder-head and other component service requests.

Open Service Form

Before sending components: Include the appropriate service form when shipping an engine, cylinder head, carburetor or ECU. Contact us before shipping an engine or cylinder head to confirm what to send.

Engines and cylinder heads are inspected after arrival. We will contact you with a detailed estimate and expected completion time before proceeding.

Let's Talk About Your Bike

Your Next Step Starts Here.

Don't see the service you need? Tell us what you ride, what it needs and what you'd like to accomplish. We'll help you plan the next step.

Contact Tokyomods Call 888-457-9403

Service shop: Monday–Thursday, 7:00 a.m.–5:30 p.m. Pacific
33155 Camino Capistrano, Unit A, San Juan Capistrano, CA 92675