high revs

[Badbob]

Originally Posted by michaelp

Question: Does the idle adjustment tend to move on its own over time

It moves with temperature. I think that is why it adjusts so easy. When I make adjustments I'm usually at a traffic light. Mine seems to be less sensitive to temperature changes as it gets more miles on it. Or maybe I found some happy medium.

I adjust by ear. I if it sounds to fast I just reach under there an turn the knob until I get something I like. I idle slower than the Suzuki recommended idle speed.

[Easy Rider]

Originally Posted by GZ250

the air filter element is good (only smells gas),

i also feel that for a couple of fill ups i am getting less mpg (63) than i used to get (65-67).

Taking those 2 things together......and not being able to SEE the bike, I would suggest that you get a new air filter. It might be clogged with something you can't see, making it run rich. Might want to remove the cap and see what comes out of that drain tube too.

If that doesn't help, it's probably gonna have to go to the shop. Probably not anything major wrong; just hard to find for the untrained eye.

[alantf]

When you say that the idle speed is low, don't forget that it should be set at 1200 - 1400 rev/min.
A cold engine will idle at lower revs,then when it warms up it will increase,so set the idle speed when the engine is good & warm. So don't forget, the proper idle speed will sound faster than a car.

[Easy Rider]

Originally Posted by alantf

When you say that the idle speed is low, don't forget that it should be set at 1200 - 1400 rev/min.

OK, fine, that's what the book says....however:

It is not really necessary to have the idle speed that high. IMHO, the ideal idle speed is the lowest one where the engine still sounds smooth and you don't tend to kill the engine when starting out. An idle speed that is too high gives you virtually NO engine braking (which the little pup doesn't have much of under any conditions) and may make shifting jerkier.

Idle speed should be set when the engine is fully warmed up; then maintain about that same speed when cold with a tiny bit of choke, if necessary, until it warms up.

Having said all that, I don't actually KNOW what my idle speed is because I've never bothered to hook up a tach. to check it. I just set it to the point where everything works the best. That may vary a bit for different riders.

[Sarris]

My only concerns w/ a low idle are engine cooling and oil pressure.

:??: :??:

[Easy Rider]

Originally Posted by Sarris

My only concerns w/ a low idle are engine cooling and oil pressure.

Not THAT low !! It starts making knocking noises about the same time that oil pressure would be a problem.
AND.....cooling ??? Does your's have a fan ?? :biggrin:

[GZ250]

UPDATE:

So I was having the "high revs" problem. Now the probem is gone and am enjoying again. Looked through all the suggestions. What I did; put a lot of oil in the throttle and moved it back and forth so that the oil penetrates deep inside, moved the idle know to too high and to low just in case if something was sticking in there but I think oiling the throttle helped as my bike remains outside.

[Easy Rider]

Originally Posted by GZ250

What I did; put a lot of oil in the throttle and moved it back and forth so that the oil penetrates deep inside,

That's the good news.

Now for the (potentially) bad: What kind of oil did you use? If it was motor oil or 3in1 oil and the bike stays outside in the sun and wind and rain, that oil will probably thicken up in a few weeks and you will be right back where you started.

You need a thin oil for the cables; a penetrating oil or MMO or even ATF will do. I would have suggested silicone or teflon but after a good dose of oil, that might not be a good choice.

[GZ250]

i used WD-40 oil this type. I also have "Cable Life" oil that is specifically for cables.

[Easy Rider]

Originally Posted by GZ250

i used WD-40 oil this type. I also have "Cable Life" oil that is specifically for cables.

WD-40 isn't really "oil". It is mostly solvents and a protectant that actually gets a little sticky when it dries.
SO.......
It is a good thing for freeing up a stuck cable and maybe flushing out the old lube but you definitely need to follow up with a "real" lubricant........like the Cable Life.