Products - Instructions
Spring Rates - Oil Levels
2010 Yamaha WR250R

Riding Type
Age
Skill Level
Stiffness Preference
Gas Tank
Lowering
Rider Weight (without gear):





  • Rider Weight (without gear):  
  • LOWERING

    Leave blank unless you are lowering the vehicle
    Flat Track is already lowered (leave blank)
  • Fork Lowered Distance*:  
  • Shock Lowered Distance*:  

Calculate Spring Rate


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  • FRONT INSTRUCTIONS and BASIC SETUP

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    • INSTRUCTIONS - Special Valving for this Kit 
       
       
    • INSTRUCTIONS - Gold Valve Compression or Emulator Valving 
       
       
    • INSTRUCTIONS - Rebound Valving 
       
       
    • INSTRUCTIONS - Oil Level 
       
       
    • Fork Oil (USF05=5w, OSFO 10=10w, etc.) 
      USF05    2 qt/liter required
      $29.99 
       
    • Oil Level - Standard MX (Click Here for other types of riding
      110 mm
       
       
    • INSTRUCTIONS - Fork Spring Installation 
       
       
    • Front Spring Preload - Recommended
      (stock height/not lowered) 
      5 mm
       
       


  • REAR INSTRUCTIONS and BASIC SETUP

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    • Nitrogen Pressure 
      165 psi
       
       
    • Shock Oil (less than one quart/liter required) 
      US1  
      $29.99 
       
    • Rear Spring Preload - Recommended
      (stock height/not lowered) 
      6 mm
       
       
    • Rear Sag (mm) 
      85  
       
       


  • FRONT FORK PRODUCTS

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    • Fork Brand, Diameter (mm), Type (U-upside down, C-conventional) 
      KYB 46U Open Cartridge Internal Top-Out
       
       
    • Fork Comments 
      FRSP 4144 springs can be modified to higher rates up to .55kg w/274mm travel. 


  • Fork Springs
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  • Fork Valving Kits
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    • Fork Gold Valve Kit
      (Kits ending in "C" include Compression AND Rebound/Mid-Valve Gold Valves)
      (Kits NOT ending in "C" are Compression Only) 
      FMGV 2020C  
      $339.99 
       


  • WP Kit Forks/Cartridge Kit
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  • Performance/Valving Parts - Other
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  • Front Lowering
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  • Flat Track Fork Performance
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  • Holeshot Device
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  • Fork Labor (at Race Tech)
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    • Rebuild Front Suspension (labor only) 
      LDFORB2  
      $200.00 
       
    • Install Gold Valves and Rebuild Front Suspension (labor only) 
      LDFORV2  
      $200.00 
       


  • Fork Maintenance and Repair
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  • Replacement Fork Tubes by TNK
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  • Fork Tools
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  • REAR SHOCK PRODUCTS

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    • Shock Brand / Body Diameter 
      Yamaha/Soqi   46 mm
       
       
    • Shock Comments 
      Spring adapter collar(s) required. 2 piece seal is stock, use Seal Assy.Adjust ride height adjuster to shaft flush with bottom of inside of clevis. Lowering 9mm at the shock helps geometry. 


  • Rear Shock Springs
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  • Rear Shock Valving Kits
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  • WP Kit Shock
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  • Rear Lowering
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  • Flat Track Shock Performance
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  • Rear Shock Labor (at Race Tech)
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    • Rebuild Rear Suspension (labor only) 
      LDSHRB1  
      $200.00 
       
    • Install Gold Valve and Rebuild Rear Suspension (labor only) 
      LDSHRV1  
      $200.00 
       


  • Rear G3-S Custom Shocks - Complete
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  • Pivot Works Bearing Kits
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  • Rear Shock Maintenance and Repair
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  • Rear Shock Tools
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  • ENGINES

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  • Select a Porting Level

    For all Porting Levels:
    We Recommend 5-Angle Radius Valve Job for Best Performance
    Price is for Bare Head (valves removed) - does not include Rebuild
    Includes Soda Blasting and Ultrasonic Cleaning

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  • Select a Valve Job Type

    For all Valve Jobs:
    Price is for Bare Head (valves removed) - does not include Rebuild
    Includes Soda Blasting and Ultrasonic Cleaning

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  • More Engine Labor
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    • Rebuild Head - Labor
          For a Complete Head with Valves and Cams
          Includes Setting Valve Lash 
      L4DCHRB015  
      $110.00 
       
    • Deck Cylinder
          for increased compression - some builds 
      L4DCYDEC10  
      $72.50 
       
    • Backcut Intake Valve (each - input 2 for 4 valve head)
          for improved flow 
      L4DCHVBC11  
      $27.50 
       
    • Install New Valve Seat (each - input 4 for 4 valve head)
          Seat installation Requires a Valve Job 
      L4DCHIS011  
      $55.00 
       
    • Install New Valve Guide (each - input 4 for 4 valve head)
          Guide installation Requires a Valve Job 
      L4DCHIG011  
      $38.50 
       
    • Cylinder Hone - Rigid (Precision Hone - not Ball Hone)
          critical if engine has been run or cylinder out-of-round 
      L4DCYHON10  
      $45.00 
       
    • L4DCRRBT10  
      $137.50 
       


  • Engine - Parts
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  • Engines - Tools
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2/20/2024