512-481-2355
harrisperformance@gmail.com
HP Race Development
  • Home
  • HP Store
  • News
  • Engines
    • Two Strokes >
      • Honda
      • KTM
      • Yamaha
      • GasGas
      • Husqvarna
    • Four Strokes >
      • Honda
      • Yamaha
      • Kawasaki
      • Husqvarna
      • KTM
    • Dyno Testing
    • Dyno Results
  • ECU
    • GET ECU
  • STIC Metering Block
  • Suspension
  • Contact
  • Company
    • Jobs and Careers
    • Rider Support
  • Category
  • GET Brand

Click each bike link for detailed information and dyno info
**All national level builds, or dyno tuned rebuilds include 30 day warranty**

YAMAHA

Picture

YZ85 Race Engine and Supermini Packages

*If full engine rebuild required, add 350 labor plus wear parts, and 100-150 for crank rebuild labor if rebuilding.

YZ85 Mod Stage 1 | $500 labor*
Killer entry level mod - outperforms most shops national packages.
-Cylinder porting and machining
-Head modifications and machining
-Set up notes for jetting, timing and pipe silencer and reed combinations.

YZ85 Mod Stage 2 | $1000 labor*
Big hp, small price.
-Cylinder porting and machining stage 2 for custom HP piston
-Custom HP piston
-Head modifications
-HP carb modifications
-Detailed set up notes for jetting, timing, pipe and silencer and reed combinations

YZ85 Mod Stage 3 National Package | $2200 plus wear parts and accessory race parts as needed
-Cylinder porting and machining stage 3
-Custom piston
-Case splitting, transmission super finishing, case stuffing, blueprint assembly
-HP carb mod
-HP custom programmable ignition 
-Full dyno tuning and break in
​
YZ85 National Supermini 103cc | $1200 plus wear parts

YZ85 National Supermini 108cc | $2200 plus wear parts

YZ85 National Supermini Athena 105 | $1200 plus wear parts

YZ85 National Supermini Athena 112 | $2200 plus wear parts
Picture

YZ125 Modifications Packages
HP is a world leader in yz125 race engines
Ask about our powerjet carb conversion!

YZ125 Mod Stage 1 | $500
Our starter package for the yz125 makes around 37 hp, is extremely reliable, and will do it with a stock pipe, stock reeds
-Cylinder porting stage 1
-Head Mods
-Set up notes on timing and jetting

YZ125 Mod Stage 2 | $1350
This combo is truly incredible for a 125cc engine at an even better price, pushes the yz to the 39hp mark with great mid range.
-Cylinder porting stage 2
-Head mods
-Reed cage
-Pipe and silencer combo
-Set up notes on timing and jetting

YZ125 Mod Stage 3 National Package | $3500
The fastest schoolboy 1 legal yz125 available, period.  Our 125's have won national titles, holeshot mammoth, glen helen, and regionals.
-Porting stage 3
-Custom billet HP head
-Reed cage
-Custom HP piston
-Crankcase coatings
-Case blueprinting and assembly
-Crank super true, welded crank pin
-Superfinished transmission
-Custom programmable ignition and special powerjet carb conversion, carb mods
-Dyno tune and break in

YZ125 134 Cylinder Conversion | $1200
Our 134 combo drops on stock cases and makes stupid power. If you are racing thr 125 in schoolby 2, local racing, or just want a killer big bore without case mods, this combo is insane.
-Cylinder boring
-Stage 3 134 porting, tailored to each customer
-Powervalve machining

-134 head machining specific to fuel and customer
-Replating
-Piston and gasket kit


YZ125 144 Cylinder Conversion | $1250
Our yz144 has pushed the amount of power thought possible out of a yz125. We have hit 45 hp on some builds! Requires case clearance.
-Cylinder boring
-Stage 3 144 porting, tailored to each customer
-Powervalve machining

-144 head machining specific to fuel and customer
-Replating
-Piston and gasket kit

YZ125 150 Cylinder Conversion and Stroker Crank race engine  Build | $1900 starting for components 3200 for full build
Our yz150 is the fastest 150cc yz package available.  
-Cylinder boring
-Stage 3 Porting for +4 bore +2 stroke
-Powervalve machining

-150 head machining specific to fuel and customer
-Replating
-Piston and gasket kit
-Crank Stroke and balance


hpyz125natlmod2.pdf
File Size: 92 kb
File Type: pdf
Download File

yz125_stage2_mod_dyno.pdf
File Size: 34 kb
File Type: pdf
Download File

hp_YZ144.pdf
File Size: 248 kb
File Type: pdf
Download File

hp_yz150.pdf
File Size: 247 kb
File Type: pdf
Download File

Picture

YZ250 Modifications Packages

 Yz250 Mod Stage 1  |  $500
More fun than you can imagine, this combo outruns those pesky KTM's when on the pipe, and outruns the competitions yz 300's.
-Porting Stage 1
-Head Mods
-Set up notes for timing and jetting

YZ250 Stage 2 |  $1100
Would have put the factory bikes to shame
-Porting and Epoxy Work Stage 2
-Head mods
-Carb Mod, jetting
​-Custom Piston kit included
-Set up notes on timing
**we offer a custom HPI ignition box that is 3d mapped for the TPS and race package, 550
stage1yz250.pdf
File Size: 34 kb
File Type: pdf
Download File

Services

Two Stroke Engine Mods
Four Stroke Engine Mods
Suspension Mods
Engine Repair and Service
Dyno Testing and Tuning
EFI tuning and Mapping
Carb Tuning
Parts and Accessories
Race Gear and Apparral
Race Fuel
Flow Bench Testing

Company

About
Jobs and Careers
Rider Support
​

Support

Contact
FAQ
Terms of Use
© COPYRIGHT 2015. ALL RIGHTS RESERVED.