Question about 2005 Suzuki Boulevard S83

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Oil/air cooled?  how does the oil/air-cooled engine compare to a water cooled one. Maintenance, quality issues? Any guesses why Suzuki would leave this one as oil/air vs water-cooled on most of their other boulevard series? Thanks in advance.

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  • Anonymous Mar 27, 2014

    Just got this bike. It was idleing and the temp gauge slowly went up...not into the red. the cooling fan kicked on, and as I rolled on, it cooled down. It's got 34,000 miles. What is the recommende coolant, how much of it, is it 50/50 mix with water or straight, & any other recommendations?


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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.

Posted on Nov 10, 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.

Nov 15, 2014 | 2005 Suzuki Boulevard C90

1 Answer

My suzuki 2005 s83 boulevard oil looks like chocolate milk.Bike has only 8000 miles.Rode and checked oil the other day was fine.I only rode 1 mile, not that hard.Checked oil today...looks bad

Sounds like water / oil emulsification. Is your bike water cooled or air cooled? If it's water cooled then you may have a gasket leak. If it's air cooled then you may not be riding the bike enough to get a good temp up inside the engine which would drive off the condensation inside the crank case / sump thereby leading to the emulsification. You say you rode an easy mile - certainly that's not enough to get the temp up enough to drive off the water. Was the bike running ok? Was it accelerating and braking ok? If so then try a cautious longer run and keep an eye on your levels. If in doubt consult a bike shop.

Jul 13, 2014 | Motorcycles

1 Answer

'95 dr350 with milky looking oil in the frame where oil is added! air cooled so it can't be a head gasket. what gives?

The oil has been worked too hard.
Replace oil immediately otherwise your engine will fail.
Also replace filter.
Use a quality oil and make sure you check it regularly.


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Feb 09, 2011 | 1994 Suzuki DR 350 S

1 Answer

Hey guys, is the 2000 GSX 600 Katana liquid or air cooled? I"ve been seeing air/oil cooled...if thats true, what does that mean? Thanks.

if it is air/oil cooled then the wind blowing on it wen your driving cools it. also the oil while circulating through the engine cools the engine.

Nov 20, 2010 | 2000 Suzuki GSX 600 F (Katana)

2 Answers


Your suzuki is air cooled with an oil cooler,it doesn't have a radiator...

May 26, 2010 | 1994 Suzuki VS 1400 Intruder

1 Answer

I have a Suzuki gs850 1983. After warming up, I get white smoke or something from the breather tube that exits the top of the head. Moisture in the form of droplets form a small puddle under the bike. ...

Check that your engine oil is clean(not contaminated with water). If you pull the dip stick out with oil on it you could put the oil coated dipstick into an open flame (lighter) for 3-5 seconds if it pops or crackles its wet.if it just smokes a bit its ok. A cold engine will do this fume-steam thing if the humidity is right.Once they warm up it usualy turns nearly clear.Make sure the bike is not exposed to rain, or cold to heat transitions.Some water from the tailpipe is normal,all gas engines can do it.If oil is dry and you dont have water from a cooling system dissapearing,(yours is air cooled) your probably ok.

Apr 08, 2010 | 1984 Suzuki GSX 750 EF

1 Answer

What to do if the engine gets to hot?????

Is it getting too hot to run properly? Most air-cooled motors run plenty hot compared to their water cooled counterparts.

If you think the bike is running too hot because of running issues I would check the usual suspects. Timing, spark, fuel.

You will need a timing light and a clymer or factory manual if you got one with the bike. The spark plug just needs checking to see if its worn down causing its own issues with timing *(with the side benefit of seeing if the bike is running too lean. A bone white spark plug electrode tip cover=too lean)

This is to say that bad timing, widened/worn spark plug or lean fuel mix can all cause a bike to run hotter than normal. But they all usually come along with driveability issues as well.

So....check it careful....and good luck!

Feb 08, 2010 | 2003 Suzuki GZ 125 Marauder

1 Answer

Whats the best oil to use in my 1996 suzuki intruder 1400..also what do think of using royal purple max cycle?

Asking about what the best oil to use is liking asking about religion. Everybody has their own opinion. For your Suzuki just use a good quality motor oil that is designed to operate in air cooled engines. If you change your oil on a regular basis (3000 miles) and change the oil filter with every oil change do not spend a lot of extra money on a supreme oil. You will just be throwing away good money that could be used for fuel to take longer rides.

Nov 16, 2009 | 1996 Suzuki VS 1400 Intruder

1 Answer

Liquid cooled.

Water cooled engines allow for a much more compact construction and a defined cooling on a wider operation band.

And no. Water Cooling should not be disabled under any circumstands, except you want to kill the engine. It would be killed, even on the north pole.

Air cooled engines have a much simpler design and production costs, also much lighter usualy, But need a lot of space. Also the heat distribution can be challinging construtructive task.

Oil cooling is available for both cooling models, but usualy only with 4-stroke engines. It just adds more cooling to the engine

May 29, 2009 | 1998 Suzuki VZ 800 Marauder

2 Answers

Oil cold engine

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.

Nov 20, 2008 | 1989 Suzuki Rg 250

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