What is the stock size for the stock predator 212cc main jet and low jet. MO Predator Racer Member Dec 26, 2021 #2 stock main jet should be.028 Low speed jet should be.016
Full Answer
What size is my carburetor jet?
0:533:13What is the Size of my Jet? - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd it'll measure the hole for you. But you know they're very expensive.MoreAnd it'll measure the hole for you. But you know they're very expensive.
How do I know what size jet I need?
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.
Are all carburetor jets the same?
Different carbs take different style and sized jets. Theres not 1 style jet for every keihn carb. You need to know what you have.
How do I know what jets to put in my carb?
0:584:14Inside A Motorcycle Carburetor - Main Jet Tuning | MC Garage - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen you're wide open you're on the main jet. The main jet is located at the bottom of theMoreWhen you're wide open you're on the main jet. The main jet is located at the bottom of the carburetor. Inside the flow pole. It's the larger of the two Jets. And it's installed.
What happens if carb jets are too big?
(A too-large main jet also mimics this symptom.) - The engine runs hot, knocks, pings and overheats. - The engine surges or hunts when cruising at part-throttle. - Popping or spitting through the carb occurs when the throttle is opened.
What does putting bigger jets in a carburetor do?
A larger jet number means a bigger hole and more fuel. A smaller jet number has smaller holes and should be used if your engine needs to run leaner. Whether your machine is running too lean or too rich is a good starting point for choosing your jets, but using a jet calculator minimizes trial and error later.
What are the different jets in a carburetor?
On the bottom for the carburetor you typically have two jets. The pilot, the smaller of the two, and the main jet.
Does main jet affect needle?
Fuel comes through the main jet and into the needle jet. So the main jet does affect the needle, especially as the throttle opening increases. The needle is attached to the slide and slides up and down within the needle jet. The needle is tapered, like a needle, and has a smaller diameter at the bottom than at the top.
How are Mikuni carburetor jets measured?
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.
Does main jet effect idle?
Even though most people relate the main jet to their carburetor in general. The main jet is only responsible for the last ¼ of the jetting. The main jet does not effect the jetting for starting and idling. It plays no part on low RPM or mid RPM jetting either.
Can you drill out carb jets?
By drilling out your stock main jet to larger sizes you will be able to narrow down what jet size your carburetor needs. You will need a numbered drill bit set. We purchased this set from Harbor Freight. The brass main jets are easy to drill so you can get by with one of these inexpensive drill bit sets.
How do I calculate carburetor size?
The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%.