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

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.

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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.

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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.

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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

What type of engine oil i can give my spirit 750 and what kind of coolant can i buy please cause i buy the bike six months ago .. many thanks lino


You can use any oil that is JASO MA certified motorcycle oil. 10w-40 for cold climate. 20w-50 for warm climate/touring. Car oils use different additives and may cause scoring in certain types of cam bearings. Do not use any oil that says " Energy Conserving " on the label . It will shorten the life of your wet clutch and transmission gears. If you choose Synthetic oils, they will help your bike run cooler and shift easier. Shell Rotella T and Rotella T Synthetic 15w-40 are inexpensive JASO MA oils. Rotella oil runs about $12 for regular and $22 for full synthetic. You will need 4 quarts of oil, an aluminum drain plug washer, and a filter. Pour in 3.4 quarts , run the motor, and check the oil level . Top up as needed.
Use only NON SILICA formula antifreeze like Honda or GM Dexcool (mix 50/50 with distilled water unless premixed), the scrubbing particles in automotive SILICA style antifreeze can damage the ceramic seal in you motorcycle water pump.With the motorcycle engine cold , located the radiator cap on or just behind the radiator and fill the radiator to the top. Then, locate the over flow bottle often placed down by your feet and fill the bottle to the high mark. Ride the motorcycle and recheck the level of the over flow bottle after the cool down period. Top up as needed.

Apr 25, 2011 | 2002 Honda VT 750 DC Shadow Spirit

1 Answer

My 2001 volusioa intruder got hot on the bottom end, left side, and the shifter got really tight and hard to shift?I was told it could be low on oil and am not sure how to check it?


Engine and Transmission
The motorcycle is powered by a 805-cc, or 49.12-cubic-inch, two-cylinder, four-stroke engine. The engine's bore and stroke measure 83.0 and 74.4 millimeters, or 3.3 and 2.9 inches, respectively. The compression ratio is 9.4-to-1. The engine is liquid-cooled. Like most other bikes in its class, the 2004 Suzuki Volusia 800 features a five speed transmission,

Suspension, Brakes and Tires
The 2004 Suzuki Volusia 800 comes with an oil-damped telescopic front suspension, and link-type, oil-damped, seven-way adjustable rear suspension with spring preload. The front and rear brakes are single disc. The bike has a 130/90-16 front tire and a 170/80-15 rear tire.

Apr 23, 2011 | 2003 Suzuki VL 800 Volusia

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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