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Products - Instructions
Spring Rates - Oil Levels 2010 Yamaha WR250R

Riding Type
Age
Skill Level
Stiffness Preference
Height
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


Calculate Spring Rates and Display Available Springs
  • FRONT INSTRUCTIONS and BASIC SETUP
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    • INSTRUCTIONS - Special Valving for this Kit 
      Click Here
       
       
    • INSTRUCTIONS - Gold Valve Compression or Emulator Valving 
      Click Here
       
       
    • INSTRUCTIONS - Rebound Valving 
      Click Here
       
       
    • INSTRUCTIONS - Oil Level 
      Click Here
       
       
    • 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 
      Click Here
       
       
    • Top-Out Spring Type - External or Internal 
      IN
       
       
    • 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) 
      95  
       
       


  • >> 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 Spring Conversion - Air to Coil
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  • Fork Valving Combo Kits

    (includes both Compression and Rebound Valves)

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  • Fork Compression Only Valving Kits

    (Combo Kit preferred if available-see above-Rebound Valves not included)

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  • Fork Rebound Only Valving Kits

    (Combo Kit preferred if available-see above-Compression Valves not included)

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  • WP Kit Forks
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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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  • Steering Damper Kits
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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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  • Twin-Chamber Replacement Parts
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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. Lowering 4-5mm 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 - LABOR ONLY <<
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    • Full Porting - Requires Valve Job
          Better power than Pocket Porting
          Recommend 5-Angle Radius Valve Job for Best Performance
          Bare Head (no valves) - does not include Rebuild
          Includes Soda Blasting and Ultrasonic Cleaning 
      L4DCH FP015  
      $447.50 
       
    • Pocket Porting - Requires Valve Job
          Great Value
          Recommend 5-Angle Radius Valve Job for Best Performance
          Bare Head (no valves) - does not include Rebuild
          Includes Soda Blasting and Ultrasonic Cleaning 
      L4DCH PP015  
      $142.50 
       
    • Valve Job - 5-Angle Radius
          5-Angle Radius for Hi-Performance (same reliability as 3-Angle)
          Bare Head (no valves) - does not include Rebuild
          Includes Soda Blasting and Ultrasonic Cleaning 
      L4DCHVJ515  
      $242.50 
       
    • Valve Job - 3-Angle
          Bare Head (no valves) - does not include Rebuild
          Includes Soda Blasting and Ultrasonic Cleaning 
      L4DCHVJ315  
      $220.00 
       
    • Rebuild Head - Labor
          For a Complete Head with Valves and Cams
          Includes Setting Valve Lash 
      L4DCHRB015  
      $110.00 
       
    • Install New Seat (each)
          Seat installation Requires a Valve Job 
      L4DCHIS011  
      $55.00 
       
    • Install New Guide (each)
          Guide installation Requires a Valve Job 
      L4DCHIG011  
      $38.50 
       
    • Crank Rebuild  
      L4DCRRBT10  
      $137.50 
       
    • Cylinder Hone (Precision Rigid Hone) 
      L4DCYHON10  
      $45.00 
       
    • Deck Cylinder  
      L4DCYDEC10  
      $72.50 
       


  • Engines - Parts
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  • Engines - Tools
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6/28/2022