What is a RC valve on a CR250?
It’s the power valve. The 02 and up CR’s are electronically controlled and work off cables.
How does the RC valve work?
The power valve is a movable flap located on the cylinder exhaust port of a two-stroke engine – where burnt gasses are flushed out of the cylinder. This helps the engine generate torque at low speeds. As revs build, the flap gradually opens, expanding the size of the exhaust outlet for greater top-end power.
What does RC valve stand for?
Remote Control. Your power-valve is opened remotely through those cables by a servo controlled by the ignition computer.
How is the power valve on a Honda CR250 connected?
Since the servo motor is connected to the power valve via cables, and the cables tend to degrade over time, the performance of the CR250’s electronic power valve depends on cable tension. The CR’s power valve servo has no way to take up slack in the cables.
How to check and adjust your valves on a Honda CRF?
We all know how important valve maintenance is on the water-cooled Honda CRF’s. Proper valve maintenance includes checking clearance and adjusting the valves as necessary. As frequently as this needs to be done, paying a mechanic to do this for you can get expensive fast.
How do you adjust the clutch on a Honda CR250?
Luckily, adjusting the CR250’s servo cables is not much more complicated than adjusting a clutch cable. Here are the five steps to getting your flapper valve to open all the way. Step one: Pull off the RC valve cover and turn the actuator counter-clockwise until it stops. Step two: Push the left-side cable to the left.
When do you close the power valve on a Honda?
Check your Shop Manual. In general, the big thing to remember on power valves is that they are closed when the engine is off. That is when you adjust them. In the closed position. On Hondas and Yamahas there usually is a small hole in the cylinder and a hole or goove in the linkage arm.