DougRaymond
New member
How to tell if the HES is bad
If the bike cranks but won't start, and you have no spark and you have no spray from an injector, then the HES is bad.
This can be checked in just a few minutes, by pulling one plug and then one injector.
In other words, the only common cause that can kill both spark and injection is the HES.
And furthermore, if you have either spark or injection then the HES is fine.
Another symptom of bad HES, sometimes, is that the tach needle jumps around like crazy while cranking.
If the bike cranks but won't start, and you have no spark and you have no spray from an injector, then the HES is bad.
This can be checked in just a few minutes, by pulling one plug and then one injector.
In other words, the only common cause that can kill both spark and injection is the HES.
And furthermore, if you have either spark or injection then the HES is fine.
Another symptom of bad HES, sometimes, is that the tach needle jumps around like crazy while cranking.