Why does my motorcycle sputter at low rpm?
There are several reasons why a motorcycle sputters. The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. Other culprits could include corroded or cracked spark plugs or spark plug wires, a faulty ignition coil, a clogged air filter, or engine timing issues.
Why does my Harley Davidson sputter at cruising speeds?
In other words, it just pushes into a seal instead of bolting on like the older carbs did. This means that the carb has to be aligned correctly or an air leak can occur around the seal. The air filter assembly is what holds the carb. into the seal and aligns the carb.
What makes a Harley Davidson engine sputter at idle?
On the Evolution and later engines, the carb is designed as a “spigot seal” type carb. In other words, it just pushes into a seal instead of bolting on like the older carbs did. This means that the carb has to be aligned correctly or an air leak can occur around the seal.
What does high idle mean on a Harley Davidson?
SOURCE: High Idle On Start-up. Most fuel injected motorcycles do start up in a “fast idle” mode. Although I don’t know much about fuel injection on Harleys (H-D will not tell you much about it unles you are one of their technicians), I don’t think the system is equipped with an engine temp sensor.
What causes a Harley Davidson engine to run hot?
You need to find this problem before you ride the bike too much. The lean mixture resulting from a vacuum leak will cause the engine to run very hot. You can’t post conmments that contain an email address.
Why does my Harley sputter at high speed?
SOURCE: bike sputters at mid to high speed. You can’t post conmments that contain an email address. Hey Tom, gonna try and help ya here…typical vapor lock/overheating is what your describing and i sure hear a lot of it w/harleys…are you using a very high grade synthetic oil , like castrol Syntec Actevo ? are you filling up w/ premium gasoline ?
When is a bad throttle position sensor a warning sign?
Engine won’t idle smoothly, idles too slowly, or stalls If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS. You don’t want to wait to get this checked out!
What should the idle speed be if the throttle is turned off?
If the ignition is turned off with the throttle in a position other than 0 percent throttle, the system wants to use a higher rpm as the new idle speed the next time the engine is started. If you shut the bike off at 1,800 rpm, the next time you start the engine it will use approximately 1,400 as the new idle speed.
When did electronic throttle control come out for Harley Davidson?
Harley-Davidson Electronic Throttle Control. In 2008 Harley-Davidson introduced a new throttle system called Electronic Throttle Control (ETC), which eliminates the throttle cables connecting the throttle and the throttle body and replaces them with an electronic connection.