Carburetor -KEIHIN PWK 28 manual choke - ØI=28mm, AW=34mm - adjusting screws right

KEIHIN PWK 28 mm carburetor with manual choke and adjusting screws right

KEIHIN PWK 28 carburetor. Carburetor equipment: secondary jet 50, main jet 135, needle JJH, slide 3.5.
The connection width is 34 mm. The air filter connection is 49 mm. Very powerful alternative to Dellorto and Mikuni carburetors. Extremely high quality.

KEIHIN PWK carburetors are the most copied carburetors in the world. And not without good reason. KEIHIN PWKs are considered the reference class in the 2-stroke carburetor sector. KEIHIN racing carburetors are not only the first choice in all areas of motorsport! Decades of experience have been incorporated into the development of the carburetors, so that this really powerful carburetor reacts very well to changes in the setting. The fine tunability results in very responsive engines that produce plenty of power across the entire rev range.

Please note: PWK carburetors react very sensitively to the setting of the mixture screw. If the engine stalls at too high an engine speed after full throttle, the secondary jet is usually too rich. In order to achieve an acceptable idle speed with the rich secondary jet, the idling speed is usually increased and the mixture screw is turned out too far (= leaner). This compensation for the rich secondary jet via the settings on the carburetor causes the engine to stall at a very high engine speed, even though the throttle has already been turned back to zero. With a smaller secondary jet, the idling speed can be set to a normal level again and the idling mixture can also be set to a richer level again via the mixture screw (turn in).

The float level should also be taken into account. This is often accidentally adjusted when removing the float chamber. To do this, always remove the float chamber with the carburetor upside down. Otherwise the float can get caught in the sloping overflow pipe.

Recommended float position PWK28: 19 mm (turn the carburettor upside down here too: Measured from the sealing edge of the float chamber to the upper edge of the float).

Kyajet - PWK tuning tool (click)