Honda CRF110 Race Head - CJR Performance

Pre-Order is now available for stock valve and big valve race heads. These will ship in the order they are received. Please allow a 30-60 day lead time from placing an order to receiving.

Unleash your build with a CJR Performance CRF110F Race Head for your stock bore or big bore 110! One of the biggest restrictions we find with the 19+ CRF110F is the intake and exhaust port along with the OEM valve springs. With the new race heads you can bring up to +20% to +30% more power (varies for different build specs) through the entire rpm range and an increased RPM limit with top end power that keeps pulling strong. 
We now have two options available, our stock valve race head and 28/24 big valve race head. 

CJR Performance Stock Valve Race Head -
Recommended for stock bore up to 147cc big bore kits. Depending on the camshaft, expect to retain good low RPM performance with a strong increase in mid-high rpm power and more available overrev.
- Improved Polished Combustion Chamber Design
- Eliminate Valve shroud for increased flow
- Ported/Polished intake and exhaust port with removed guides for increased flow
- 22mm Intake Port to allow use of 24mm and 26mm Throttle Body Kits
- 22mm Exhaust Port to pair with smaller and larger exhaust systems 
- Upgraded HD Valve Springs safe to 12,000rpm (11,000rpm recommended for most exhaust, 12k+ only with a larger 30-34mm throttle body, high lift cam, and large exhaust (yoshimura/rocket big bore)
- Machined Spring Seat to allow the largest camshaft profiles available
- Stock valve size to improve low end response and increase long term reliability, OEM replacement valves available at any Honda dealer
This cylinder head comes updated with new features and fully assembled (Excludes rocker arms/tappets) -
NOTE - ECU Flashes are available for specific configurations, see here- https://cameronjonesracing.com/pages/honda-crf110f-available-tunes

CJR Performance 28/24 Big Valve Race Head - 
This cylinder head comes fully assembled (Excludes rocker arms/tappets). Recommended for larger builds 132cc-173cc. Depending on the camshaft, expect a slight loss in low RPM performance with a drastic increase in mid-high rpm power and more available overrev.
- Improved Polished Combustion Chamber Design
- 28/24 Big Valve with revised valve angle
- Eliminate Valve shroud for increased flow
- Ported/Polished intake and exhaust port with removed guides for increased flow
- 25mm Intake Port 
- 25mm Exhaust Port 
- Upgraded HD Valve Springs tested safely to 11,000rpm
- Machined Spring Seat to allow the largest camshaft profiles available
NOTE for 28/24 Head-
- Recommended to be used with 30-25mm or 34mm-25mm throttle body kit.
- Recommended to be used with a larger diameter exhaust,, Yoshimura, Rocket Big Bore, Bills Big Bore
- Recommended to be used with high lift camshaft (CJR S2, Decha 5.5, DCR)
- Currently Requires aRacer Standalone ECU, CJR ECU Flashes are currently in testing

DUE TO THIS PRODUCT USED AS A RACE ITEM, THIS PRODUCT DOES NOT OFFER A WARRANTY - FOR RACE COMPETITION USE ONLY
NO RETURN OPTION AVAILABLE
REQUIRES ARACER ECU or CUSTOM DYNO TUNE, ECU FLASHES AVAILABLE FOR CERTAIN CONFIGURATIONS

*Updated cylinder heads as of 8-10-22, these heads are not decked and will clear all current camshafts opposed to the previous heads that required a second base gasket for larger camshafts.

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES
This product is legal for closed-course competition use only; for racing vehicles (a competition vehicle not used on public highways). Intended for off-road use or race purposes; does not meet regulations of pollution controlled roads or highways. This system is NOT compliant with the California Environmental Protection Agency (E.P.A.) or California Air Resources Board (C.A.R.) for use on public roads or lands.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -- Learn More