Question about 2008 Husqvarna CR 125

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Lots of smoke

I have a 1987 cr 125 i just rebuilt, engine rund great but has alot of smoke and is spraying oil onto my garage door, fuel mixture is correct anything i can do to stop this?

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When you rebuilt it, I would assume that you replaced the piston rings. Were they installed correctly? Assuming they were, were the valves cleaned and the valve seals replaced? You obviously are getting oil into the cylinder(s) somehow, and these are usually the main culprits. Unless the head gasket has developed a leak.

Posted on Jan 21, 2009

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Posted on Jan 02, 2017

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1 Answer

Rebuilt and still smoking


how much smoke because 2 stroke engines do blow quite a lot of smoke it is normal as you mix oil with fuel to lube the cylinder walls and the piston

Jan 24, 2014 | 2008 Husqvarna CR 125

1 Answer

2002 Honda CR 125 R fuel mixture adjustment@


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Cr125 carb adjustment for noob
2 stroke Carb Tuning Idle Adjustment Fix Your Dirt Bike com
Honda CR 125R 2002 Sevice Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CR125R 2006 Owner Manual

Jan 19, 2013 | 2002 Honda CR 125 R

1 Answer

Blue smoke comes out my exhaust only when choke is on


Blue smoke is usually the result of burning oil. It should not be burning at all, as it shouldn't be entering the combustion chamber or leaking on or in anything in a properly operating "4 stroke" (or 4 cycle) engine. Blue smoke in exhaust is not a normal condition for a properly operating "4 stroke" or "4 cycle" engine.

When the choke is on, the mixture of fuel and air is brought from "Stoichiometric" (about 14.7 parts air to 1 part gasoline or a "14.7:1 ratio") to a more "rich" mixture (about 13:1). This is not the ideal mixture to run, but it makes it easier for the engine to start and stay running until warmed up. When the mixture is rich, is is not uncommon to see black smoke - which happens because of incomplete combustion in the engine. The balance of the combustion happens in the exhaust system, where the energy in the fuel is converted only into heat and zero power. Since there is little air in the system, black smoke is produced. It may even smell of raw gasoline, too.

When running at proper mixture ratios of fuel to air, little if any smoke should be observed in the exhaust gases. It is possible that this small amount of oil being burned is so minute that it is not readily visible under these conditions - but is probably present never the less. You should carefully monitor the engine oil level and keep it filled. Oil leaking in the combustion chamber can indicate a problem that can be expensive to repair.

Two cycle (or two stroke) engines on the other hand, require that the oil and gasoline be premixed in the tank or are blended together "on the fly" and for this reason is not unusual to see blue smoke in the exhaust gases even when unchoked.

I hope this helps & good luck!

Jun 15, 2012 | 2006 Peugeot XPS CT 125

1 Answer

2002 Honda CR 125 R carburetor settings


Hi, Irideayamaha it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
7. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
8. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
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.
Cr125 carb adjustment for noob
2002 cr125 Idle adjustment
Honda CR 125R 2002 Sevice Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda Elsinore CR125M Owner Manual

Dec 21, 2010 | 2002 Honda CR 125 R

2 Answers

I have a 83 ford ranger 2.3ltr 4cyl 3years ago i replaced the engine with a rebuilt engine with 40,000 miles!the truck has been sitting for atleast 2years i go out a start it and let it run once a...


Blue smoke is OIL
Black smoke is RICH MIXTURE
White smoke is WATER (head gasket).

I would take it to a garage and get it tuned up, timing, and carb adjustment for mixture. You need an exhaust sniffer to best do that.

If you have far too much fuel in the cylinders, it can seep past the rings under pressure. That much fuel would make it run rough and contaminate the oil.

Feb 27, 2017 | 1983 Ford Ranger

1 Answer

87 325 runs good when


It's the automatic choke!

The choke is "closed" or barely open... When cold, the engine needs a RICH mixture (more gasoline, less air). When the engine warms up, it requires a LEAN mixture (less gas, more air).

It is probably creating BLACK tailpipe smoke ... that means unburnt gasoline. (Blue smoke is OIL, white smoke is WATER).

Put the parking / emergency brake ON.
1. Remove air cleaner assembly from intake, use a carb cleaner spray or throttle body spray cleaner and spray just a little. (AutoZone $5)
2. Find the accelerator2.gif arm under the hood.
3. start car, rev the engine to make sure how to operate the accelerator from under the hood.
4. Carefully spray into carb / throttle body and work the accelerator ... don't let the engine die...
5. Watch out for "backfire"... it may create a small flame out of the carb. It will extinguish itself in one second.

6. You may need to do this two, three times.
7. Add a "complete fuel system2.gif cleaner" to your next tank of gas ($8).

That's it! ... pretty cheap, too.

Hope this helps!

Sep 04, 2009 | 1987 BMW 3 Series

2 Answers

Oil and gas mixture coming out by exhaust


first off make sure the oil gas mixture is correct and mixed very well.... have the carb cleaned out very well or even rebuilt, jetted and adjusted...

Jul 06, 2009 | 2003 Yamaha YZ 125

1 Answer

Oil


Hi KK
Use 600 ml is you are changing the oil, or 650ml  if you have just rebuilt the engine and filling from dry. Use light weight gear oil. 
regards robotek

Dec 19, 2008 | 2005 Honda CR 125 R

2 Answers

GAS MIXTURE CR 125


i would mix it 50/1 it will make your bike run a whole lot better

Nov 28, 2008 | 2002 Honda CR 125 R

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