I appreciate that this is only a similar problem but my wife had a similar problem with her old vaxhaul corsa, we got the big guy across the road to help because big guys are usually good with this sort of thing lol, ok he had a great car lots of tools and was always inside his cars engine. He came across half hour later with jump leads and I yelled stop because not just sparks but the cable covers melted and I found it to be a little off. after that we had nothing, no ignition, no lights just nothing and a car mechanic came looked in the engine but couldnt see anything we explained about the battery and on testing it he found that the battery itself first drained as suspected and then we broke it by overloading it somehow in the end a new battery sorted the problem which cost £50 but in the long run we thought it a good price. the battery lasted us another 4 years until the car had had enough and went in for scrap. hope you can take something from that and you can sort your bike :)
SOURCE: how to synchronize carburater on 1981 yamaha
should use a manometer., 4 column. A hose fits on each carb and you adjust until all 4 carbs pull the same vacuum.
SOURCE: '05 Suzuki Boulevard C90 sometimes won't turn
I've got a 2006 and just found this while surfing around...
Realistically, diagnosing the problem behind a bike
that won't start, can be a frustrating experience, as
there are many potential problems that can create the
same symptoms. Here are a couple of guidelines to help
determine the root of a "labored" starting
problem, and by "labored", we mean that the
starter motor kicks in and attemps to turn the engine
over, but either can't get it over the "hump",
or does so with a lot more effort than usual.
If your battery is over two years old, and you CONSISTENTLY
have a labored start, then the first suspect will be the
battery.
If she starts cold with no problems, but CONSISTENTLY
has labored starting while hot, then the charging system
should be checked. A grounding rectifier can actually
discharge your battery while you ride. The battery can
somewhat recover while sitting, so it may well start the
bike while its cold, but then not be able to start it
after only a few miles of riding.
If everything on the bike seems to be in perfect order,
and you OCCASIONALLY have a labored
start, or no-start, for no apparent reason, and with no
perceived pattern, then very likely, the rear decomp cam
is loose. A good test for this is to place the bike in
second or third gear when it won't crank, and push it
backwards a few inches while in gear, then try again. If
it starts then, you definately have a loose rear cam.
Pushing the bike backwards while in gear moves the rear
piston back off its compression stroke enough to give the
system a running start at it when you push the button.
This will only happen when the rear cylinder stops on its
compression stroke. Therefore, it seems impossible to
predict when it won't start. Might be cold, might be hot,
might only happen once today, but maybe three times
tomorrow...This occasional no-start is
the prime indicator that the problem lies with the rear
decomp cam. (If the front cam were out of adjustment, it
would NEVER start properly, as both cams would then be
off their specs.)
---Quoted from http://www.moccsplace.com/images/decomp/decomp.htm
Testimonial: "I thought it might be something with the compression stroke as well, it appeared to labor. Finally replaced the starter, hasn't given me a problem sin"
SOURCE: I have a Suzuki gz250 and it wont start. I rebuilt
Also be sure that you are in nuetral and clutch engaged when trying to start.
SOURCE: I have a 2003 Suzuki VL800 turned the key on
Sounds like a possible stuck relay, a bad connector or low battery amperage. Try this to help troubleshoot. Put a volt meter on your battery and check voltage with key off, should be 12.2v at least, turn the key on and check,---then hit the starter switch---you should see a drop in voltage as the battery power goes to the starter---if no voltage drop then power is not going across your start switch. Of course, make sure battery is at full charge, has no dead cells, terminals are clean and tight, and especially the ground. Many times i have found the ground cable going to the frame in bad shape, (you can't see the corrision, u have to remove the cable) this will cause all kinds of problems... no start being one of them. I hope this helps, let me know what you find.
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