Question about 1989 Suzuki Rg 250

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Oil cold engine

Someone told me my bike has an oil cooled engine. What does this mean? I thought the radiator type thing on the front was to cool the oil.

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TheSuzuki RG250 is water cooled with a conventional air cooled radiator (no fan assist).
Good design flows the cool water to the hottest part of the engine first.

Posted on May 10, 2009

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Some manufacturers use a hybrid cooling method where engine oil is circulated between the engine case and a small radiator. Here the oil doubles as cooling liquid, prompting the name "oil-cooling." Suzuki has produced many "oil-cooled" motorcycles.

Posted on Nov 20, 2008

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1 Answer

I have a ud 2000. Temperature oil light Came on. what does that mean?


some ud (nissan)engines have an oil ,cooler for the sump oil built into the engine block and others have the same thing plus an oil cooler in front of the radiator to cool the transmission oil. What ever it is means that you have to have it checked out before any real damage is done.

Feb 07, 2015 | Cars & Trucks

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Where is the coolant resevoir located


A C90 is not a water cooled engine. It is a design that uses air and oil to cool the engine. There is no conventional radiator or coolant on this model. The finned cooler you see on the front of the bike is an oil cooler.

Nov 15, 2014 | 2005 Suzuki Boulevard C90

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How do i fix the low oil pressure issue im having. When i drive, the temp stays normal at 210 but when i idle, it goes up to 260. I was told the oil pressure is low and i needed a new engine


Your engine is overheating, which isn't directly related to oil pressure. I would take the S10 to a reputable/trusted mechanic and have him perform the following tests.
Compression Test Leak Down Test Coolant System Pressure Test Inspect Oil for Moisture (you can do this one, remove the dipstick, does the oil on it look like milk? If it looks like milk it means there is water/coolant in the oil, a sign of a blown head gasket. However not all head gaskets dump coolant into the oil when they blow) Inspect Clutch Fan for proper operation
The mechanic will know what those mean, It sounds like your head gaskets may be blown, which is why the engine would be overheating. Also if the Clutch Fan isn't working properly, it won't pull enough air through the radiator to keep the engine cool at an idle or while sitting still.
If the Head Gaskets are blown, it doesn't necessarily mean you need a new engine.
One other thing to note, when an engine overheats, the oil breaks down and no longer works as good as it used to.

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I have a '83 Honda Nighthawk that I'm having oil light problems with. Once the engine gets warmed up, usually after about 10 minutes of riding, and I come to a stop sign/light the oil light comes...


If your oil pressure light is coming, you probably have low oil pressure caused by worn engine parts. Usually low oil pressure is observed when you are idling since the pump is pumping slowly. When you raise RPM's, the pump speeds up and pressure increases. Take the bike to someone who can diagnose it properly, but it sounds like it is time for some repairs.

Gary

Aug 03, 2011 | Honda CB 500 Motorcycles

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Hello, My 2011 fatboy lo runs very hot. I have Vance and Hines big radius and screamin eagle stage one kit. It runs hot but it runs awsome. i wanted to put an oil cooler on the bike but was told to leave...


There's hot and there's too hot. Heat is one of the factors that shorten the life of an engine, especially an air cooled engine. You bike is equipped with the oil jets that help cool the pistons. If it were my bike, I'd take the bike to a known good high performance shop that had a dynometer, an exhaust gas analyzer, and a good mechanic that knew what he was doing with both the bike and the dyno. I'd have them run the bike up through the RPM range and check the fuel-air mixture ratio at various rpm levels. If the bike is running too lean, it'll run hot. Lean is mean but too lean is bad. The mechanic may can richen the mixture up just a bit, say from 14.2:1 to 13.7:1 and reduce the heat while maintaining the performance you want. It's worth a try.

Good luck
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Jun 01, 2011 | 2011 Harley Davidson FLSTFB Fat Boy...

1 Answer

I need to know is my 92 suzuki gsxr750 water cooled or is it an oil cooled (if thats even poosible) an where do u add coolant at ?


GSXR 750 '92 spec is oil cooled ( If you look at the front of the motor you will see a narrow slightly curved radiator that's the oil cooler) The water cooled bikes have a radiator cap at front right side of the fairing. If you cant find a radiator cap it's definately oil cooled. Safe Riding!

May 06, 2011 | Suzuki GSX 750 ES Motorcycles

1 Answer

Engine starts and runs great for 20 to 30 minutes or riding, then starts to lug at low rpm, and acts like its getting hot. If you let it cool, it runs great again. It does not have the optional elec fan,...


what kind of bike are we working on?? the avg temp for the elec fan to turn onis around the 220 mark. the best thing to do here is bench test the bike start it up and let it idle, put a fan that moves air in front of the bike, this will help to keep things cool while the bike heats up i know it kinda back-@ssward but do it. a inferred temp gun will help you get the temp, you can pick one up at your local auto parts store. check the temp near the senser for the fan and the radiator itself. keeping a GOOD oil, clean oil in your bike that will help with the cooling as well. If your running a bike with a fuel filter ( If your not GET ONE ) make sure its clean. Bikes with fuel pump, you a two types in tank and external, your in tanks pumps should have a filter on them in the tank, over time they get clogged like a inline filter and can cause poor running as well.
If everything is working as it should you'll need to look into your coils. Heat causes resistance, resistance causes heat and heat causes wires to break down and contact points to to weaken. Coils take alot of abuse when it comes to electricity, it doesn't always happen but it does. coils go out and tire wear odd sometimes.
I hope this helps you out if you need any more help please feel free to contact me
Fix it right Ride it FAST
M.Woodring

Apr 18, 2011 | Suzuki Rg 250 Motorcycles

1 Answer

Oil/air cooled?


the radiator would have cluttered this sleek bike and would have gotten away from the scheme of the bike. water cooling is definately a good thing, but is more expensive, and the price of this bike is very reasonable. a good oil cooler can drop the operating temp as much as 100 degrees over an air only bike. having said that, there is a multitude of bikes with thousands and thousands of trouble free miles that have neither. comes down to preference, and or geography.

Nov 10, 2008 | 2005 Suzuki Boulevard S83

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