How do I know if my main jet is too lean?
If the bike surges or hunts, the pilot jet is probably too small (lean). Other indications that the pilot circuit is lean are popping or spitting through the carburetor when the throttle is opened and popping or backfiring through the exhaust when the throttle is shut.
What do you need to know about jetting?
Jetting in itself refers to the process (mostly trial & error) of adjusting your carbs to get as close as possible to the perfect air/fuel ratio. Typically this consists of changing the main jet to a larger (or smaller) size, changing the pilot jet size, adjusting the airscrews, and adjusting the needle clip position.
How do you re jet a Yamaha Road Star?
Place the white plastic spacer under the clip from the stock needle. Do not use the washer under the spacer as was on the stock needle. Put a washer on the top of the clip. Now insert it back into the slide and press the plastic tab with the small spring back in. Make sure the rubber diaphragm is seated properly with the O ring towards the rear.
What should the jet temperature be on a motorcycle?
NOTE – Advanced Options – You can just go with the default settings here as all motorcycles are factory set to run at sea level and at 20′ Celsius (68′ Fahrenheit). However by adjusting these settings will help you achieve a more accurate calculation.
How to adjust the throttle on a Yamaha yz450fr?
Turn both the air screw and throttle screw inward until they LIGHTLY seat. Now back each one outward one and one half turns. This is the factory setting. I am going to give you a web site where you can download a free PDF factory service manual for a YZ450FR.
What do you need to know about ATV jetting?
#1 – The first thing you need to remember is that ATV jetting refers to throttle position, not engine rpm. Each jet is effective for a specific throttle position range. The pilot jet, or pilot screw as it is sometimes referred to, controls the flow of fuel between Idle speed and about one eight of wide open throttle (WOT).
What should the jetting temperature be on a four stroke bike?
For four-stroke bikes, our jetting specs are for premium pump gas at 0-1500 ft altitude at 70-85 degrees temperature. Please Note: The stock OEM jetting for your specific model is listed first, followed by our recommended jetting underneath that model.
Place the white plastic spacer under the clip from the stock needle. Do not use the washer under the spacer as was on the stock needle. Put a washer on the top of the clip. Now insert it back into the slide and press the plastic tab with the small spring back in. Make sure the rubber diaphragm is seated properly with the O ring towards the rear.
How to jetting the carburetors on a Yamaha V-Star 1100?
Jetting the Carburetors on a Yamaha V-Star 1100. 1 Jetting the Carburetors on a Yamaha V-Star 1100. –By Steve Schneider CycleForay Copyright 2004 All content, images, etc. is the intellectual property of Steve Schneider and protected by United States and International Copyright laws.