harley is misfireing at rpms over 3000 progressivly got worse over last 50-75 miles?

Question

harley is misfireing at rpms over 3000 progressivly got worse over last 50-75 miles?

Answer 1

It sounds like an ignition problem to me. If you bike is an oldie with mechanical points, clean and adjust them first as well as change plugs. If a later model with electronic ignition, I'd clean or change the plugs first. Keep in mind that with weak ignitions, plugs can look good but still miss. If that doesn't help, I'd check the resistance of the plug wires. I personally don't like to see them much over 10-12k ohms. If you have resistor caps, be sure to check them too. If everything checks out so far, then it may be the ignition coil. Not sure of the type of coil on yours, but if it has a plastic case, you might look for cracks. That's usually a sign of internal problems. Oil leaking from liquid filled coils is also a problem, although those usually make for hard starting. If all the obvious things check out ok, then you might go through the wiring connections checking for corroded or loose connections, bad grounds, etc. Normally one would think the missing at +3,000 rpms is a sign of insufficient spark strength, but it could be the result of increasing engine vibration acting upon loose connections.



One last thing, many years ago my buddy's '82 FLH kept kicking out the circuit breaker. I finally found the problem inside the headlight shell. I forget the exact details, but there was a wire that had worn through the insulation by rubbing on a bolt, maybe the one that held the shell or direction light on? From the factory the wire was way to close to the metal object and over the years, vibration had done its work. As a precautionary, I fixed the one on the opposite side before it went bad as well.

Answer 2

As an proprietor/rider of a number of diverse HD motorcycles -over the years, the presently outfitted bike from Harley-Davidson is a mind-blowing device. some would possibly not in basic terms like the engineering, others would possibly not in basic terms like the fee tag. nevertheless others do not understand that there is a mystique with possessing/using a Harley. i've got additionally owned -and presently very own- different manufactures motorcycles. in case you're searching for for a cruiser variety bike, evaluate a HD as a physically powerful investment. With a extra powerful return on resale fee. a minimum of extra powerful than the different "wanna-be" it is presently made. And, they seem to be a blast to holiday! difficulty-free maintenance is needed for any bike. A 'seventy two Honda in my storage leaks extra oil than a 'sixty 5 HD... yet, I abuse the 'seventy two Honda extra. All in all... the electrical powered wiring on a 'eighty 4 became poor. a prior proprietors meddling with an 'eighty 5 brought about problems. A 'ninety softail became a physically powerful device. The 'ninety 5 Dyna -nevertheless in the storage- has an occasional electric powered start up difficulty -by means of low battery...yet in basic terms minor maintenance themes over the final 14 years. The '07 is a physically powerful motorbike and all waiting to depart the following day on a protracted holiday. BTW: The HD electric powered wiring systems have been redesigned in 'ninety six and because are nicely easily worth the money. might i purchase yet another? Yep... already thinking of paying for for and advertising in the '07 in a twelve months or 2. BTW: i've got owned Hondas, consisting of Goldwings, Kawasaki's, Suzuki's, Polaris, Yamaha's... frequently street or cruizers... in no way owned a interest motorbike, rode some, yet they are actually not comfortable to me. storage presently has 3 honda's and 2 Harleys. All classic Honda's... have not got here upon the only classic Harley, in the form/variety i prefer for a value i'm keen to pay.

Answer 3

When was the last time you had your bike tuned? Your plugs sound fouled. But, how often does this happen? Is this bike a new bike or used, but new to you? If plugs are fouling regularly, there is an underlying cause.



When I bought my last used bike, the previous owner had rejetted the bike improperly. It took me four months of going back to the dealership telling them that the plugs were fouled- again- and to get them to understand that it wasn't ME choking the life out of the bike. Upon getting past the girl thing- they listened. Plugs that repeatedly foul are a symptom of something else wrong.



But, again, before assuming the worst, get your bike tuned. If you have an older bike that can be choked, use the choke as little as is necessary (get the bike started, release the choke, and use the throttle with your hand to warm up the bike).

Answer 4

Trace tachometer wires ( usually pink) a shorting tac wire will act like a kill switch,

Check your coil wires.

There is very little in the way of mechanical issues that will cause a mis . Look for an electrical

issue, ,loose wire, short maybe bad coil.

Answer 5

Sounds like either your plugs are fouling or the points are going bad. Time for a basic tune-up.

Answer 6

Rub a nickle between the points. This'll get ya home. Replace points soon.

Answer 7

They got it man

ign. is breaking down on you

if not a points set up ck your coil and of course all connections in wires

Answer 8

look for a wire that's vibrating on something and causing

it to Miss fire and pop and snap,

possible a "hot" wire arcing on something metal.