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My bike starts up great then after I ride a few miles it starts to choke and stall. 2004 1200custom sportster. I checked the plugs and they seem fine but I changed them anyway. This is a new problem. the bike has run well for the last few years that I've had it. If I pull over and let it cool down it starts right back up again.
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Sounds like it may be sucking air from one place or another. You may have a small hole in a fuel hose, problem with fuel filter, or just a weak connector where the tube makes a connection. Something a little more major would be a gasket under the carburetor needing replacement. Check the tubes first. A fault with gasoline that contains ethanol is that they bring on deterioration of fuel lines. This is the easiest fix.
Only running good with the choke on is an indicator that the bike is normally running too lean. The fact that it runs good with the choke on at least tells me it is getting fuel to the carb(s). Therefore it seems probable that there is clogging in the carburetor jets or there is a big air leak between the engine and carb(s).
hi
i do not know what motorcycle you have ?
but i detect you may have a choke problem
some motorcycles have a manual choke
and some have an automatic choke
automatic choke comes on with the ignition and
goes off when the motorcycle gets to normal running temperature
hopefully it could be a just a relay that operates your choke
but the other problem with automatic chokes are
if the motorcycle is only used for short journey's
it does not give the bike chance to get up to normal running temperature
eventually the choke will seize up in the closed position
this will make it feel like the engine is choking out as you described
to repair this you will need to remove the carburetor's find out where the choke is
take it apart and clean it up and reassemble the choke mechanism and reassemble the carburetors
refit them to the motorcycle
if your choke is a manual choke
there is a good chance your choke is seized in the closed position
if so it means that the bar between your carburetors that operates the choke has seized
to repair this take the carburetors off
find the bar that operates the choke
and spray some fine oil and move it around until it frees off the mechanism
then refit the carburetors to the bike and give it another go
4700 not a lot of miles. This motorcycle needs to run. It will be rough until you can get the carb cleaned. I would keep doing what you have been doing for a while. After a couple hundred miles if it doesn't improve, you might want to consider having the Harley shop give it a good tune up. Check the plugs ...
A 2003 model with only 50 miles?? Wow....well,since youve already taken the carb apart and cleaned it,did you hook up the vaccum line for the VOES switch on the intake manifold? If so,..when you get the bike running,..spray some brake clean around the intake where it bolts to the heads.If the idle picks up,or starts to sputter,..youve got leaking intake gaskets. Which is a good possibility on a bike that old with that few miles on it.The choke essentailly adds more fuel to the motor,and by what your saying,the bike is obviously running lean. Also,...im ASSUMING that you have fresh gas in it,and the petcock is turned on.
Check your battery connections and make sure they are tight where the positive cable attatches to the starter and the negative cable attatches to ground. Sportsters are notorius for this type of problem when the cables are loose.
check for the pinched vacuum line at the carb,, sportys are hard to locate because they are tucked in way behind , it ay have come disconnected, unless there is a load on the motor it will idle fine, add a little load and you get the feeling no fuel is getting through unless you rev it up
When you are on the bike and riding do you still have the choke out? And stop spraying starter fluid into the carbs..bad bad bad.... bikes start with out that stuff and if you need it then something is wrong.. your gonna mess something up doing that....let me know about the choke and we will go from [email protected]
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