Question about 2004 Suzuki RM 125

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Mi suzuki rm 125 2004 smokes and from the breather of the exhaust valve leakes dark oil what can be?

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Fuel mix and exchaust rubbs

Posted on Jan 18, 2009

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  • austo Jan 18, 2009

    hey do u mix in her

  • austo Jan 18, 2009

    what do u give her ?i got kx 250/ 2000 fuel mix 1:25 thats every litre of fuel give 25'ml of oil /////for more leaner go 1"22ml

  • austo Jan 20, 2009

    no in a fuel can jerry can

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Can too much oil cause blue smoke?


Hi, Michael most definately and the usual suspects are:
1. Oil tank/pan overfilled.
2. Restricted oil return line to oil tank/pan.
3. Restricted breather operation.
4. Restricted oil filter.
5. Piston rings badly worn or broken.
6. Valve guides are worn and or seals worn, crushed, missing, or have come of guide and is pumping oil through the valve guide.
7. O-ring damaged or missing from oil pump at crankcase junction (also results in poor engine performance). For more information about your issue, please visit the websites below. Good luck and have a nice day.
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White smoke exhaust


Hi, Anonymous and the usual suspects are:
1. Oil tank/pan overfilled.
2. Restricted oil return line to oil tank/pan.
3. Restricted breather operation.
4. Restricted oil filter.
5. Piston rings badly worn or broken.
6. Valve guides are worn and or seals worn, crushed, missing, or have come of guide and is pumping oil through the valve guide.
7. O-ring damaged or missing from oil pump at crankcase junction (also results in poor engine performance). For more information about your issue, please visit the websites below. Good luck and have a nice day.
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Yamaha V-Star '07 1100 oil leak at rear cylinder exhaust pipe seam


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I have an 1982 suzuki gs g. a few days ago someone bumped into and knocked it over in the night, the next morning when i tried to start it, it almost turned over, but a bunch of blue smoke came out and it...


Since the bike laid on its side all night,oil got into your top end and just needs to be run till all oil is cleared out.Clean the air box and anything connected to it.The breather from the crank case runs to the air box,that's why there's oil in it.Should only be a fine mist when running.This is the bottom ends only way to breathe,piston goes up,pulls air in from breather hose.Piston goes down,makes pressure and has to have a means to releave that pressure from the cases.This is how the bulk of bigger bikes are set up to opperate.Just laying on it's side for any length of time won't hurt anything other than what I just said.Takes a bit of time for it to finally clear all oil from tha breather system,and you'll have to change your plugs a coupl of times.Use NGK's that burn oil.

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1 Answer

2004 rmz 250 was riding started to smoke heavily from exhaust bike stalled no coolant in rss but nothing leaking ?


If it was white smoke coming out you may have blown a head gasket. If it is water cooled and there are no signs of external leakage then it only has one other way to go, inside.
If you have an oil dipstick, pull it out and check to see if your oil looks more like a milk shake sludge. Even if you can't see it, try dumping your oil from the sump and take out your oil filter. (unless it is a 2 stroke)

Sep 17, 2011 | 2004 Suzuki RM-Z 250

1 Answer

Just put new crank and bearings in 05' rmz250. Got her put back together and she fired right up. problem is that she is filling up the flywheel housing completely full of oil and smoking out the exhaust....


Did you forget the crankshaft seal or install the wrong part behind the flywheel? It should be replaceable when the flywheel is pulled. I'm not sure what that has to do with blue smoke coming out of the exhaust. Did you over-oil the rings when you put it together? The smoke may clear itself after running a while. Other than fouling the plug and alerting the EPA, it won't hurt it to smoke a little while. Did you check to see that the oil level in the crankcase was correct?

Sep 03, 2009 | 2005 Suzuki RM-Z 250

2 Answers

My 04 rmz250 is overheating. It started smoking 3 different times when i took it out the other day. Id let it cool down for a few, continue riding and about 20 minutes later it would start smoking again....


Several things here. Do an oil change, 10w40 motor oil. Run premium gas and install a new NGK spark plug one heat range colder than stock. It sounds like you have an air leak causing a lean fuel mix. Check the carb mount bolts and the intake manifold bolts for tightness. Also set the valve clearances with a cold engine > .002 intake and .003 exhaust. Check for any cylinder head leaks. This would show up as oil on the cooling fins at the base of the cylinder head. Tighten the head bolts if needed.

Apr 28, 2009 | 2004 Suzuki RM-Z 250

2 Answers

Smoke alot


sounds like the bike is in need of new piston rings especially if that much oil is blowing on such a newer bike. if the crankcase is not overfilled, then focus on rings especially if the sparkplug is oily too.

Feb 03, 2009 | 2004 Suzuki RM 125

5 Answers

2005 RM 85 fouling plugs every ride.


obviously theres way to much oil in the mix. Speak to your local bike shop and ask them on the best mix for the bike

Nov 27, 2008 | 2005 Suzuki RM 125

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