Are all Keihin carb jets the same?
Yes, the jets are interchangable, IF it is the same series of carb .
How do I know what size carb jet I have?
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.
How are Keihin Jets measured?
Keihin jets are measured by the orfice size. A 180 jet is 1.80mm in diameter. The Dynojet main jet hole size is measured in millimeters. For example, a DJ142 has a 1.42mm hole.
What does putting bigger jets in a carburetor do?
Bigger carburetor jets allow more fuel to enter the carburetor from the fuel tank. Usually, installing bigger jets alone is enough. Installing a bigger carburetor altogether is only done for major modifications, where you have significantly improved your bike’s air intake and fuel injection.
Will Mikuni jets fit in a Keihin carburetor?
You can use Mikuni jets, but you will have to cross-reference to a Keihin chart. They thread right up and are nearly the same size.
How do I choose a jet size?
The suggested change in jet size is to go down one jet size for every 1,500 feet in density altitude you go up. Conversely, for every 1,500 feet you go down in density altitude, go up one jet size.
How do I identify my Keihin carburetor?
Look at the carburetor itself. You will find a number that is usually preceded by two to three letters. This is your model number. This number is needed for all parts orders or repair assistance.
What size is a 38 jet?
A # 38 Jet is 0.38 mm in diameter.
Does jet size affect idle?
As far as jetting goes, the jet size will not affect idle, as the jets don’t come into play until the carb transitions to the primary circuit, unless the throttle blades are open far enough to expose the transfer slot.
Are Mikuni and Keihin Jets the same?
numericly they are the same size. the only thing yoou have to consider is whether to use the mikuni large round or small round …
Are Keihin and Mikuni jet comparison?
On the Mikuni take the number of the jet and divide by two, that is the size in mm. i.e. a 320 main has a bore of 1.60mm . On Keihin the size is the bore in mm i.e. a 150 main jet has a bore of 1.50mm. Hope this helps Dave.
Where to get replacement parts for Keihin cvk40?
While most of the following information applies to all CV carbs, and to some extent all carb types, this article is specific to the Keihin CVK40 found on many Kawasaki motorcycles (KLR’s and Vulcans) along with some Harleys. If you need replacement parts you’d be well advised to get them from your local Harley Davidson outlet.
What kind of jet does a Kawasaki carburetor use?
On the CVK40 it consists of a collar and what Kawasaki calls a holder. Most 4-strokes have pin holes along the length of this brass jet. These pin holes allow air from the air jet to premix with fuel from the fuel jet to start the mixture emulsification process before it enters the venturi. Primary type carbs use a solid jet, (no pin holes).
What is the diameter of a cvk40 carb?
The CVK40 is technically a bleed type carb, with a variable venturi that’s controlled by constant velocity (CV). It’s also known as Constant Depression or Constant Vacuum. The 40 in the name represents a 40 mm venturi exit diameter.
How does the fuel jet work in a carburetor?
Most carbs have a one piece needle jet. On the CVK40 it consists of a collar and what Kawasaki calls a holder. Most 4-strokes have pin holes along the length of this brass jet. These pin holes allow air from the air jet to premix with fuel from the fuel jet to start the mixture emulsification process before it enters the venturi.