Stock Bore Power Package for CRF125F - CJR Performance

A range of options for those looking to do a simple, yet efficient stock bore kit for your Honda CRF125F. We created these packages in mind of getting the best bang for the buck per upgrade. 

CJR Stock Bore Stage 1 Power Package (CRF125 SBS1)
This budget friendly package is designed to remove the largest restrictions found in the stock ECU, maximize power while keeping the engine completely stock and quiet with the OEM exhaust system. As you can see in the dyno graph, while adding just the baffle does increase power, the paired custom CJR Performance ECU flash is what really brings this package to life.
Included in this package - 
- CJR CNC Baffle
- CJR Performance Mail-In ECU Flash
- Increase up to +22% more midrange with improved low end response over stock
 
CJR Stock Bore Stage 2 Power Package (CRF125 SBS2) 
This package is designed to remove the biggest limitation for power found on these engines which is the OEM camshaft. This kit feels like a small big bore upgrade and packs a PUNCH! While the stock cam provides good low end response, it severely lacks on throttle response and power through the midrange into the top end. Our SS cam profile retains great low-mid range power while allowing a good bump in mid-high RPM performance. Rev limit is limited to 9,200rpm due to the aggressive profile of this camshaft (add CJR High RPM Valve Springs to increase RPM Limit). Tunes available for stock, CJC CNC baffle, slip on and full system aftermarket exhaust.
Included in this package - 
- CJR Performance SS Camshaft 
- CJR Performance Custom Mail-In ECU Flash 
- Increase up to +36% @ 7,500rpm with the Stock Exhaust + CJR CNC Baffle.
- Increase of almost +40% @ 8,500rpm with an Aftermarket Full System exhaust. 

CJR Stock Bore Stage 3 Power Package (CRF125 SBS3) - (Coming Spring 2024!)
Compared to the Stock Bore Stage 2 power package. Add an extra 1,500rpm on top of the Stage 2 package with a big jump in performance throughout the high RPM range. Perfect for those that race on the limiter.
Included in this package - 
- CJR Performance RS Camshaft
- CJR Performance HD Valve Springs
- CJR Performance CNC Intake Manifold
- CJR Performance 24mm Throttle Body 
- CJR Performance Custom Mail-In ECU Flash
- Increase up to +15% more top end over Stage 2, which comes out to over +82% more power at redline vs stock!