CJR/TB Parts 138cc Big Bore Power Package for CRF125F - CJR Performance

A range of options for those looking to do a simple, yet efficient big bore kit for your Honda CRF125F. We created these packages in mind of getting the best bang for the buck per upgrade. This package does include an ECU flash so it will require you to mail your stock ECU to be flashed and updated for the new modifications.
These kits are recommended to be used with aftermarket exhaust systems however we do have individual tunes for the the stock exhaust and CNC baffle as well. 

CJR/TB Big Bore Stage 1 Power Package (CRF125 BBS1) Retail $369.99 / Package Price - $329.99
This package adds an increase in power throughout the low-mid range. Tunes available for stock, CJC CNC baffle, slip on and full system aftermarket exhaust.
- 25% increase at 4,000rpm
- 50% increase at 7,000rpm
- 37% increase at 9,000rpm
- 37% increase at factory redline
Included in this package - 
- TB Parts 55mm Big Bore Kit
- 120cc Injector
- CR9E Spark Plug
- CJR Performance Custom Mail-In ECU Flash
- Optional CJR CNC Exhaust Tip
 
CJR/TB Big Bore Stage 2 Power Package (CRF125 BBS2) Retail $451.99 / Package Price - $399.99
This package is designed to remove the biggest limitation for power found on these engines for a big bore upgrade, which is the OEM camshaft. Tunes available for stock, CJC CNC baffle, slip on and full system aftermarket exhaust.
- 13% increase at 4,000rpm
- 45% increase at 6,000rpm
- 91% increase at 8,500rpm
- 90% increase at factory redline
Included in this package - 
- TB Parts 55mm Big Bore Kit
- CJR Performance TB Camshaft
- 120cc Injector
- CR9E Spark Plug
- CJR Performance Custom Mail-In ECU Flash 
- Optional CJR CNC Exhaust Tip

CJR/TB Big Bore Stage 3 Power Package (CRF125 BBS3) Retail $651.99 / Package Price - $589.99
Compared to the Big Bore Stage 2 power package. Add some extra sauce on top of the Stage 2 package with a performance bump throughout the RPM range, most noticeable mid-top. Perfect for those that race on the limiter.Tunes available for stock, CJC CNC baffle, slip on and full system aftermarket exhaust.
- 13% increase at 4,000rpm
- 58% increase at 6,300rpm
- 101% increase at 8,000rpm
- 108% increase at factory redline
Included in this package - 
- TB Parts 55mm Big Bore Kit
- 120cc Injector
- CR9E Spark Plug
- CJR Performance TB Camshaft
- CJR Performance CNC Intake Manifold
- CJR Performance Custom Mail-In ECU Flash
- Optional CJR CNC Exhaust Tip

These package require to mail in your ECU for a flash. After purchase, please ship your ECU to the address below and include a note in the package with your name and order number. Once we receive your ECU, we will ship it back with the supplied hard parts. 
CJR Performance
5825 E Hwy 163
Columbia MO 65201