Doug,
Well, unfortunately you had it serviced at a dealer. :-) Nothing is
screaming at me, but did any of these morbidities exist before the service?
Your ideas are fine, except for #1, as I don't think it has overflow tubes.
For emissions reasons, overflow tubes were removed from street bikes in the
80's. Now if your carb floods it runs into the engine, fills a cylinder,
hydrolocks the engine and dilutes your oil with gas. :-( Bring back those
overflow tubes! I don't really expect the other two to be the problem, but
they are cheap and easy so go for it. I suspect that the carbs still
aren't clean somewhere. Carb cleanings often aren't thorough enough.
First check your float/fuel levels. This is easy and can be done without
disassembling anything. The full throttle problem could be a torn carb
diaphragm which isn't lifting your slide properly. That is also easy to
check on your bike. I love the orientation of the carbs on the 500/535,
because the slide covers are right out there.
Jeremy
...FYI: My 75k mile XV500K has had a
recent carb service (clean and synch) and regular general maintenance
(fluid
changes, valve adjustments, etc) at a dealer. Good clean air filter, plugs
are both a healthy grey when I clean them. The bike starts very reliably.
There is one consistent problem and two intermittent ones:
The consistent problem is that I can't get full throttle. The bike starts
to
cough and I have to back off. This seems independent of how hot the bike
is.
The intermittent problems are when the bike has run long enough to get good
and hot, there are two minor problems that arise:
1. Very intermittently (2 or 3 times in twenty miles): while cruising on
the
highway, the bike will skip a beat, almost like it is starting to run out
of
fuel (which it isn't), or like the coils forgot to fire, or something cut
off its air, seemingly for just one revolution. Its very quick when it
happens.
2. When I go from cruising to stopping at a light, I have to stay on the
throttle in small, brief increments to keep the idle from dipping down low
enough to die.
So far the things I have come across that seem worth looking at are:
1. Carb overflow tubes plugged?
2. plug replacement
3. coil check
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