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Motor Work and Bike Prep

ECU/EFI mapping

With over a year of testing, we have come up with significant improvements to the stock mapping on the 2009-2012 KX450Fs.  From motocross to offroad to trail riding, we have settings cutom designed for each application.  Our goal was to increase tractability and to pull longer in each gear.  Reducing wheel spin and arm-jerking power helps the bike accelerate quicker and reduces rider fatigue.  Side benefits are better handling  and increased fuel mileage.

Send or bring in your ECU unit from behind the front number plate.  This is a guaranteed service, a one time remapping charge includes resetting the unit for any change of riding venues for as long as you own your bike.                     $69.00
Also available for KX 250Fs and Honda CRF 450Rs

Head porting

One of our best kept secrets is now out in the open, our in house porting was used in the Factory Honda Off-Road bikes for over a decade.   We have tested on every brand and this service is now available to all.   This service is also customized for each application, motocross or off=road.  We feel that this is one of the single best performance modifications that can be done to your motor.  You can drop your bike by and we will remove the head for you, or send or drop the head off, no appointment is necessary.                                                                            (head only)  $450.00

Besides suspension, we are also experts at engine rebuilding and modifications as well as complete race bike building. Phil Valdez heads up our service area with years of experience on both race team and customer bikes. The same person that builds our race team motors and bikes also does yours, meaning you get the same level of work and commitment that the pros get. We do everything from general repair work to full race modifications. Call or come in and talk to Phil to see what we can help you with. We also schedule track test days where you can ride one of our bikes or try some of our mods.Port and polish  Be sure to get on our email list for days and locations.

Vehicle and Engine Services  Available
Engine Performance Modifications:

  • Head porting
  • Cams
  • Ignition system modifications
  • General bike maintaince
  • Complete engine or top end rebuilds
  • Complete Race Bike Preparation
  • Custom carburetor jetting, cleaning and maintenance
  • Air box modifications
  • Exhausts systems
  • Wheel lacing, truing, and balancing 
  • Clutch modifications and adjustment
  • Valve adjustments
  • Block off kits
  • Tire mounting
  • Bearings pressed

Click here for our Suspension Service


Why Precision Concepts ?

Factory Honda Offroad has had 1000s of miles of reasons:
11 straight Baja 1000 Championships for Factory Honda Offroad
First overall Bike in every SCORE race from 2000-2008

4 Open Pro Championships--Best in the Desert
3 Vegas to Reno overall winners

The Ride the Pros trust: 

               Wayne Matlock- 2009 SCORE ATV Open Pro Champion

            Steve Hengeveld–6 Straight Baja 1000 wins, 3 AMA D-37 Open Expert Championships

            Robby Bell – WORCS Series, 3 Time Score Baja Open Pro Champion

            Kyle Loza-X Games Best Trick Gold medalist

            Marty Smith - 3 Time MX National Champion

            Larry Roeseler - Score, ISDE, Winner 

Ongoing Testing, Development and Modification for Motocross, Off Road, Desert, Freestyle, Supermoto


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