When to replace the main jet on a Harley Davidson?
The Main Jet is only used at 3/4 to full throttle and has no effect on the idle or midrange mixture. Main jet replacement should be reserved until after the slow idle jet is replaced and mixture is tuned unless a lean condition is apparent during full throttle.
How does carburetor jetting work on a Harley?
Install the carburetor back onto the bike and perform the tuning procedure as described under Carburetor Tuning. As you can see, Harley carburetor jetting is a fairly simple procedure that under most conditions will yield greater performance when requiring a richer fuel mixture.
How big should the jetting be on a Harley?
If your stock jet was a #42 the next size larger will be #44 or #45. Only increase the jet sizing one size at a time to avoid an overly rich idle. An EZ-Just mixture screw will also assist in fine tuning once you have the correct jetting.
What happens when a throttle body goes bad?
As with any electrical connection, connectivity issues can cause a wide variety of unpredictable signals to be transmitted. In the case of the throttle body (and related sensor), when this happens it causes false information to be relayed to the car’s computer, resulting in faulty corrections to the air-fuel mixture.
The Main Jet is only used at 3/4 to full throttle and has no effect on the idle or midrange mixture. Main jet replacement should be reserved until after the slow idle jet is replaced and mixture is tuned unless a lean condition is apparent during full throttle.
What kind of engine dies when throttle is applied?
Idles good… dies when throttle is applied??? Got an 86’ Bayou 300. Starts good, idles fine, but when I attempt to apply any throttle, it dies. Any ideas? Thanks. plugged jet in carb, remove bowl and remove jets and use fine wire or small drill bit to clean out port in jet Click to expand…
Install the carburetor back onto the bike and perform the tuning procedure as described under Carburetor Tuning. As you can see, Harley carburetor jetting is a fairly simple procedure that under most conditions will yield greater performance when requiring a richer fuel mixture.
If your stock jet was a #42 the next size larger will be #44 or #45. Only increase the jet sizing one size at a time to avoid an overly rich idle. An EZ-Just mixture screw will also assist in fine tuning once you have the correct jetting.