Proper Carburetor and Reed Selection
The proper racing Reed cage should provide as much airflow as possible, and the following Reed cage characteristics:
- Long narrow easy-opening petals and high air speed
- NO inserts, boosters, or stuffers as they cut the air speed killing the total airflow.
- NO wings, bars, or airfoils inside the cage. This causes longer airflow distance, which slows the speed and restricts movement of air.
- Provide the Reed cage with the largest amount of air at the highest speed. More flow truly means more go!
Recommended Carburetor Sizes
| Engine | Carburetors |
|---|---|
| 80cc | 26/28mm |
| 125cc | 34/35mm |
| 250cc | 35/36mm |
| 500cc | 36/38mm |
Jetting Info and Process
When installing our Reed cages, the engine will generally run "RICH" on the low end, due to the increased air/fuel flow from our more efficient design. The following jetting guide will start you off in the right direction.
- Lower the pilot jet size by 1 or 2 sizes smaller.
- Raise the main jet by 1 or 2 sizes larger. (Note: these steps are very important in that, if you lean the pilot, you must richen the main jet. This keeps the same amount of fuel going to the engine.)
- The pilot jet is the correct size when the engine pulls hard in the lower ranges, and runs crisp and clean.
- The main jet is correct when the engine runs smooth, lean, and clean in the upper RPM ranges. A two-stroke runs better with a richer jet setting. (Note: the sparkplug should have a DARK BROWN color on the insulator.)