A wide range of options for those looking to do a simple, yet efficient stock bore kit on a mostly stock bike, up to a full tilt 110cc race build. This kits have been tested with various exhaust combinations and spec tunes built for each configuration.

CJR Stock Bore Stage 1 Power Package (SBS1) - $314.96 - Package Discount = $279.99
This package is designed to remove the largest restrictions found in the stock intake hose, throttle body, and intake manifold to get the most out of your CRF110 build while retaining all OEM internals. Expect to feel similar low end performance as stock, with power that continues climbing strong to a raised rev limit of 10,200rpm.
- Decha Intake
- 24mm Throttle Body
- CJR CNC Manifold
- CJR Oiled Air Filter (During Installation, remove OEM mesh backfire screen
Optional CJR Performance ECU Flash

CJR Stock Bore Stage 1+ Power Package (SBS1+) - $439.96 - Package Discount = $389.99
Add some extra punch to your Stage 1 build with the Stage 1+ kit which adds the DHM High Compression Stock Bore Piston kit! With the addition of the HC Piston, we generally find a bump in 10-15% more power across the ENTIRE rpm range. This package is designed to remove the largest restrictions found in the stock intake hose, throttle body, and intake manifold to get the most out of your CRF110 build while retaining all OEM internals. Expect to feel a bump in low end performance compared to stock, with even more additional gains that continues climbing strong to a raised rev limit of 10,200rpm.
- Decha Intake
- 24mm Throttle Body
- CJR CNC Manifold
- DHM High Compression Big Bore Kit
- CR9E Spark Plug
- CJR Oiled Air Filter (During Installation, remove OEM mesh backfire screen)
Optional CJR Performance ECU Flash

CJR Stock Bore Stage 2 Power Package (SBS2) - $439.95 - Package Discount = $389.99
Compared to the Stock Bore Stage 1 power package, this kit gives your stock piston setup an improvement of +10% through the top end, all while retaining that low RPM punch the OEM camshaft provides.
- Decha Intake Hose
- CJR CNC 26-22mm Intake Manifold
- CJR 24mm Throttle Body
- CJR Stage 1 Camshaft (During installation, remove snorkel from top of airbox)
- CJR Oiled Air Filter (During Installation, remove OEM mesh backfire screen)
Optional CJR Performance ECU Flash
This kit is optional for the S1 cam included in the kit or for $50 more the SS camshaft found in our 110R package. SS Cam highly recommends a valve springs upgrade to take full advantage. Send us an email for a custom upgrade to your package.

CJR Stock Bore Stage 3 Power Package (SBS3) - $653.91 - Package Discount = $599.99
This package gives your build an extra 10-15% bump over Stage 2 with a bump in power across the entire RPM range. More response off the low end, stronger mid range pull with improved top end overrev. This kit is highly recommended to be paired with higher octane fuel or custom tuned for VP C85 or traditional pump e85.
- Decha Intake Kit (During installation, remove snorkel from top of airbox)
- CJR CNC 26-22mm Intake Manifold
- CJR 24mm Throttle Body
- CJR S1 Camshaft
- DHM High Compression Piston Kit
- CR9E Spark Plug
- Cometic Thin Base Gasket
- OEM Head Gasket
- Keihin 120cc/Minute Larger Injector
- CJR Oiled Air Filter (During Installation, remove OEM mesh backfire screen)
Optional CJR Performance ECU Flash
This kit is optional for the S1 cam included in the kit or for $50 more the SS camshaft found in our 110R package. SS Cam highly recommends a valve springs upgrade to take full advantage. Send us an email for a custom upgrade to your package.

CJR Stock Bore 110R Race Kit (CJR110R) - $1,193.89 - Package Discount $999.99
Bring your stock bore build full tilt with our stock bore CJR110R package. Compared to the stage 3 kit, expect an additonal bump across the RPM range that really comes on from 6,000rpm and up. Paired with an extra 1,000rpm of additional overrev and a new rev limit of 11,000rpm, all with no loss to the low end. (This kit is highly recommended to be paired with a larger exhaust like the Yoshimura, Rocket Big Bore, or Bills Big Bore System)
- Decha Intake Hose
- 26mm Throttle Body
- CJR CNC Intake Manifold
- CJR Stage SS Camshaft
- DHM High Compression Piston Kit
- CR9E Spark Plug
- Cometic Thin Base Gasket
- OEM Head Gasket
- CJR Stock Valve Race Head
- 120cc/Minute Larger Injector
- CJR Fuel Line
- CJR Oiled Air Filter (During Installation, remove OEM mesh backfire screen)
Optional CJR Performance ECU Flash

*Note - When using the OEM exhaust, we recommend adding the CJR CNC Exhaust baffle for an increase in low-mid range response and top end gains.

CJR Power Packages