Posted: 8/13/2006 5:12:28 PM EDT
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PLEASE EMAIL ME - I cannot check ar15.com at work. --- OK - I have a 78 SUZUKI GS1000 When I run the bike I do not see any WHITE SMOKE. HOWEVER I have noticed that (1) time when I left it in the driveway with the idle on HIGH for a while as I was in the house - when I came out the bike was blowing white smoke from one of the 2 pipes. Age - rings - oil bypassing rings --- I GET IT.. The engine holds a little more than 4 QUARTS OF OIL It does not smoke any other time - but it does have the OLD ENGINE SMELL TO IT - you guys know what I mean. NOW MY QUESTION.. If I go to AUTOZONE and pick up a bottle of the (NO-SMOKE) aditive and put it in the engine will this cause PROBLEMS ??? --- I have done this in my old 89 CHEVY 1500 V8 and it did not harm it - actually made it a little better. LET ME KNOW..... |
It's not a fast idle. It's a choke. It restricts the amount of air taken in by the carburetors. When this happens, the air/fuel mixture gets richer. When the engine is cold, the extra fuel is burned and it helps the engine to idle better while it warms up. Once the engine is warm, the extra fuel does not get burned completely. You have some unburned fuel in the combustion chamber, or more correctly, still burning fuel. A couple of things will happen. First, the extra fuel can actually wash away the oil layer on the cylinder walls by going past the rings (and also contaminating your oil with fuel), and secondly, the unburned fuel will tend to still be burning as it goes past your exhaust valves and into your header pipe. (Seen blue/yellow pipes on a bike before, right after they come out of the engine? Those engines are running too rich a mixture.) Moral of the story: Don't run your engine "on choke" for any longer than it takes to warm it up. A good rule of thumb is to listen to the engine. When the engine speed makes a dramatic increase, you know it's warmed up. Take it "off choke" as soon as you hear that change in RPM. As to the smoke, could it have been on a day when the humidity was pretty high? Maybe coupled with lower temperature and lower dew point? If it does not consume any oil, I would not worry about it. You did not say either way, so I'll assume it does not consume oil. Not sure what the "OLD ENGINE SMELL" is. I'm aware of the "old sneakers smell", and the "old cheese smell", and even the "old people smell", but not the "old engine smell".  I would not add any NO SMOKE or similar to the oil. I believe strongly in "Marvel Mystery Oil" in the fuel system (you can use it in the crankcase as well) to keep the carbs clean. It was developed for aviation engines. Here's a quick link. I use it regularly and consistently have great mileage and performance in my bike's engines. Others dismiss it as "snake oil". It works for me. Got a V-twin with 50k+ miles and a V-four with 70k+ miles and feel no need to ever touch the carbs. Ever. That's all I can offer. Good luck. |
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I'm with only_a_flesh_wound..... sounds like you are getting smoke from running on CHOKE when its no longer needed. I'd suggest an oil change (unless its still pretty fresh), a new set of plugs, and a fresh tank of gas..... See if turning the choke off sooner makes the problem go away. Pull the fresh plugs after a while and see if they are sooty (to rich a fuel mix) or oily. I think if you use the choke properly, you won't see either on the plugs. I'd be inclined to pull the plugs and look at them now... compare those from the cylinder(s) that connect to the pipe that was smoking against the plugs from the other cylinder(s). |
If you are just getting the smoke with the choke engaged, not when actually driving, the choke is sending the fuel/air to way rich. Gas will show too much fuel as gray smoke. |
BLACK smoke.
Reading spark plugs is a lot like reading tea leaves, except it works. 
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Thanks men - I appreciate the help. Yeah if I choke it low when I normally warm it up - I get NO SMOKE at all. Engine runs smooth all the tie I have just noticed that on that one event. I plan to pull the plugs this weekend and check them out.. As for old engine smell -- If you have ever been around OLD vehicles and smell the EXHAUST you can tell the difference in the smell verses a new car. Smells a little more GASY - you know. |
If "choke it low", we are still talking about the motorcycle right? , you mean just advancing the choke lever slightly, and by "high choke", you mena advancing the lever to the stop, or most of the way to the stop.............?The "choke" restricts the air intake passages. Putting a little choke on restricts the airflow, less than full choke. The same amount of fuel will go in, with a bit of choke, full choke, or no choke. Since the amount of air can be signifigantly restricted, a little choke will be "a bit rich", while full choke may be so rich that the air/fuel ration is signifigantly skewed. Trying to say, I don't think you have a problem, as long as the bike runs properly w/o the choke on. |
| I may be mistaken since it has been a while since i have worked on one but I am pretty sure that bike has an enricher system on it. Not a choke. An enricher is like a second pilot jet that adds more fuel. Not many bikes used a true choke with plates to close off the air supply. |
I thought some had "real" chokes, but the end result is the same, an air fuel mixture that has a higher ratio of fuel than usual. |
This is correct on a 78 GS. They went to CV carbs and choke plates in 82? with the E models. Dont put any cack in your oil, it may affect your clutch. If it isnt smoking while running off chocke or decellerating dont worry about it. Those old bike really respond well to a tune up. Points, condensors, plugs, wires, plug caps and an air filter. |
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