Question about 2003 Suzuki RM 125

2 Answers

Oil leak by exhaust pipe

I have a 1975 Yamaha DT250 that I am fixing up and today after a ride I noticed oil on the head fins that looked like it came from the exhaust pipe, what could this be?

Posted by on

  • royjmcc May 11, 2009

    Thanks guys for your info, let me clarify, my bike is a 2 cycle with an oil injector system and the oil seems to be coming out from where the pipe meets the head.

  • marcmx1 May 11, 2010

    was the leak coming from where the pipe joines the head or where it connects to the silencer


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 50 Answers

I am not personally familiar with a 1975 DT250, but here is a general overview. If the bike is a 4 stroke, the oil you observed could have been from the exhaust, however it is more likely that it is from a leaky valve cover gasket or a head gasket. If the bike is a 2 stroke, the "oil" is from the exhaust (expansion chamber). It is excess 2 stroke oil that accumulates. You should reduce the mix to 32:1 or even 40:1 and replace the oring gasket in the opening of the pipe. If in a pinch you can use high temp silicone, but not a good way to go.
best wishes!

Posted on May 11, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Make sure you check to see if the exhaust pipe gasket is there. Without it, there will show an oil leak

Posted on Sep 09, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

2002 ktm 250 dirtbikes oil leak between cylinder and head by exhuast port

Hi, Anonymous to find the source of your oil leak, start at the point where you see oil and trace its path going up and forward, blowing baby powder from the palm of your hand will help in those difficult to see areas if there is too much oil present then buy a spray can of engine degreaser apply it to the affected area then rinse off with a pressure wand or garden hose, use compressed air to blow off excess water or just let it drip dry, take your bike for a 15 minute ride and check for the leak.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
2002 250 EXC Case Oil Leak
Engine leaking oil through tiny cast hole under exhaust
KTM 250 SX 2005 Repair Manual
KTM 250 SX Owner Manual

Apr 02, 2017 | KTM SX 250 Motorcycles

1 Answer

Gas/oil dripping out of small weep type hole on the bottom of left outer exhaust pipe,and left cylinder not very hot thanks Help

Hi Lucien, sounds like you have a faulty spark plug, for more information about your question please visit the website below. Good luck and have a nice day.
1975 Suzuki Motorcycle Service Repair Workshop Manuals

Mar 18, 2013 | 1975 Suzuki GT 380

1 Answer

Cylinder head oil leak

Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Vice pRide Project XJR 1 Removing Cylinder Head
Yamaha XJR1300 99 Service Manual
OEM parts for Yamaha

Jan 28, 2013 | 1996 Yamaha XJR 1200

1 Answer

Backfires badly when downshifting or just letting off the throttle v-star 1100

Most people have this problem after changing the exhaust system. In your case you have to unbolt the exhaust system just to change the oil filter during an oil change. There is an oil filter relocation kit available for around $400 that allows you to both use a spin on filter and not have to unbolt the exhaust system every time you change the oil. The cause of your problem is air leaking past the exhaust o-rings in the head. Buy new exhaust o-ring gaskets for the head and your problem should be solved. If there is a sealing pipe gasket going from the head pipe to the muffler you may have to replace that too. The cause of your problem was probably an oil change where the mechanic replaced the oil filter but did not bother to replace the exhaust o-ring gaskets. Happy riding.

Jul 02, 2011 | 2004 Yamaha V Star Classic

1 Answer

I have rcently bought an 1991 xj600 it was involved in a accident and has some damage but looked cosmetic mainly just chipped fins and broken footpeg/indicator. I have been riding it for a while and now it...

STOP RIDING IT! You have a few moderate issues going on that need to be fixed as soon as possible! If black smoke is coming out of your exhaust, then you probably need your carbs cleaned, and need to check and see if oil is some how making it into the cylinders. Oil leaking from the air cooler means you have a break in your radiator, either the hoses or the radiator itself. Fortunately these are rather inexpensive, but the longer it goes, the more expensive it becomes. Also check your oil level to make sure you're not below the recommended amount of oil in the engine. This oil does a few things, keeping your engine cool (radiator), keeps stuff moving (pistons and such), and also acts as the lubricant for your clutch plates and gears. For parts I use Bike Bandit but the site also has diagrams that you can use to figure out how stuff fits together. Also the manuals are available online which offer help for maintenance and such. I hope this helps, and if it does, please feel free to give me a thumbs up! Have a great day and good luck! Ride safe!

May 04, 2011 | 1990 Yamaha XJ 600

2 Answers

I recently had a 100,000 major service on my 2004 TL. Within a couple days I noticed a pronounced smell of burning oil. I have since noticed a puddle of oil has formed under the car and just today there...

It's probably OK to drive. I imagine they failed to get the oil filter properly seated and you're getting a little leak there. DO BE SURE to check the oil level before you drive it and add if necessary.

Feb 27, 2011 | 2004 Acura TL

1 Answer

There is an oil leak around the bolts that hold in the top exhaust pipe where connects. I am new to the bike but know previous owner and they tell me there has never been an issue. The bike has sat for...


The oil you are seeing may very well be from the bike sitting. I have worked on many bikes that have had similar problems. The oil bypasses the rings and gets forced out the top of the cylinder. Once the bike has been used for a couple of days, sometimes a few days longer, the rings expand sealing the cylinder and thus no more oil. It would be a good idea to examine the cylinder bolts too to make sure that the oil is not leaking from the cylinder head.

When a bike, or any motorized vehicle or tool, sits for an extended period of time, parts that are supposed to be lubricated by the motor running will dry out or shrink. This can cause a decrease in engine life and costly repairs. Always try to start your bike, even if you don't ride it, and let it run through the warm up procedure everyday.

Even if the oil leak stops on your bike, you should still have the exhaust leak fixed. Grab the exhaust pipe, when cool :o), and see if you can feel any slack by pulling on it. I would spray a penetrating oil on the bolts, let it sit overnight, and then try to tighten, or replace, them yourself.



Jan 08, 2011 | 2002 Yamaha V Star 1100 Classic

2 Answers

Have a 2004 yamaha classic changed to K& D pipes ran fine then 2 years ago after an oil change it started backfiring on deceleration and has gotten worse...have spent over 7 hundred dollars and no one...

Well - the front pipe has to be removed to change the oil filter on this bike, so it's very likely that when reinstalled the mechanic did not get it back in place correctly. Couple that with the likelyhood that he re-used the old exhaust gasket and this is your most likely cause for the backfire - a simple exhaust leak. Other typical causes for exhaust backfires are insufficient valve clearance, burnt valves or incorrectly adjusted carbs. In my experience the most common cause for exhaust backfire is a leak in the exhaust circuit which can draw in fresh air during decelleration.

Nov 15, 2010 | 2004 Yamaha V Star 1100 Classic

1 Answer

Oil leak

It is most likely a leaky cylinder head cover gasket. There are also rubber seals that go around the bolts that hold the cover onto the head. Look closely and you will, very likely, see oil coming from one of these areas.

Nov 15, 2009 | 2007 Honda VTX 1800 F

1 Answer

Oil on front cylinder fins between exhaust and tappet cover .

when you take it off loose nothing inside. make sure parts are OIL FREE- use rags and brake cleen or any good degreaser and a clean rag apply a small amount of gasket maker/ sealant as per tube instructions.
Good luck!

Aug 03, 2009 | 1999 Yamaha XVS 650 Dragstar Classic

Not finding what you are looking for?
2003 Suzuki RM 125 Logo

1,167 people viewed this question

Ask a Question

Usually answered in minutes!

Top Suzuki Experts


Level 3 Expert

75822 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

Ed Nelson
Ed Nelson

Level 2 Expert

149 Answers

Are you a Suzuki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides