Who makes Harley CV carbs?
Keihin
Unlike aftermarket carburetors using throttle controlled slides or butterfly valves, the Harley CV made by Keihin uses a vacuum actuated slide. The unique design constantly changes the size of the venturi (throat) based on manifold vacuum while simultaneously metering the air/fuel delivery.
What size is a Harley CV carb?
Harley Davidson Pilot Jets for CV Carburetors are normally sold in sizes 40, 42, 45, 48, 50, and higher. A Stage 1 Carb Kit will normally offer you a proper range of jets for your particular model.
What size is my Keihin carb?
Measure the inside of the engine side of the opening using a caliper. If you have a stock 2000 KDX200 carb, it will probably measure 35mm.
Are CV carbs good?
CV, or Constant Velocity carbs offer the best real-world performance for day to day riding where your throttle isn’t pinned all the time. the CV carb allows much more precise metering and thus, a less boggy engine under load conditions.
Why does my Harley backfire through the carb?
High performance long duration cams open the intake valves earlier than the stock one. This is the main reason why modified Harley engines tend to backfire through the carburetor more frequently than stock engines. Intake manifold air leak: An air leak can cause carburetor backfiring.
What do carb jet numbers mean?
For example, a jet may be stamped (on its head) with the number 30. This indicates that the jet’s size is 30 mm. Installing a smaller size jet will reduce fuel flow, which is ideal for high-altitude conditions where air is limited, where a larger jet size increases fuel flow for oxygen-rich, low altitudes.
What RPM should a Harley idle at?
approximately 950-1050 RPM
To ensure proper charging at idle, maintain an idle speed of approximately 950-1050 RPM. Insufficient idle speed may drain the battery in excessive idle situations, resulting in insufficient voltage to the ECM, ignition coil and fuel pump (which can result in a variety of operating problems).
How do you identify a PWK carburetor?
A copy of the PWK carburetor will have an unmarked light hose. The serial number will be darker than the genuine carburetor. The jets and needles tend to be unmarked in these type of carburetors.
