Oil cooler on a 620

[eesnas]

So after not having my bike for a while due to the tip-over incident a while ago, I got it back the other day. I had a bunch of stuff done, and a few things still on the way, but I am using the bike as my only transportation because my car is in the shop. I will have pics of the bike up soon though...

My reason for posting was the oil cooler I had installed, apparently it is making a big difference. I have not seen the bike hotter that 225, I used to creep up to the 300 range! I am not sure if this is in my head or if it's just because I haven't been on the bike in a while but it feels faster- could this be because the temp is lower???

I spend a lot of my time in traffic so this mod was a good one, I used to get nervous watching my temp skyrocket at redlights and that isn't happening anymore 

[Duck-Stew]

The cooler the incoming air/fuel into the cylinder is, the more dense the air will be and more dense air does equal more power...  So, it's possible...

I've long been an advocate of oil coolers on the 620's and I'm glad to see your happy w/yours.

Enjoy it...ride safe,
--Stuart

[eesnas]

The cooler the incoming air/fuel into the cylinder is, the more dense the air will be and more dense air does equal more power...  So, it's possible...

I've long been an advocate of oil coolers on the 620's and I'm glad to see your happy w/yours.

Enjoy it...ride safe,
--Stuart

Good to hear there might be a scientific explanation, makes me feel a lot less crazy! 

For the cost of grabbing one used it was money well spent...

[metallimonster]

I use my 620 for my daily commute also and really want to do this mod.  Anyone know of a good place to get a used oil cooler or should I just keep checking parts for sale until I see one? Will any other monster cooler work?  What else goes into adding one?

[Duck-Stew]

I use my 620 for my daily commute also and really want to do this mod.  Anyone know of a good place to get a used oil cooler or should I just keep checking parts for sale until I see one? Will any other monster cooler work?  What else goes into adding one?

Get the lines, adapters, and cooler off of one bike as there are two different fittings that adapt the engine threads to the oil cooler lines and that will help eliminate guess-work.

You'll need the horizontal intake valve cover which has the provision for the temp sensor in it and the flapper valve which goes UNDERNEATH the double-ended stud that the oil filter mounts to.  If you fail to put the flapper valve in, the oil flow won't work right and your cooler will be much less effective.

Used parts (imo) are fine and you may want to PM some of the guys in Parts for Sale to have them keep an eye out for you...


I always found it odd that a 750 had the same HP as a 620 did and the 750 got the cooler....and the 620 didn't.

[Dxomas]

I added the oil cooler to my 695 a few weeks back... 95 degrees here in Tampa. My Bike hasn't gotten over 200F.
Before the cooler I would see 240/250F.

[speedevil]

I used to get nervous watching my temp skyrocket at redlights and that isn't happening anymore

OK, I'm confused.  Unless you're stopped at a redlight in a hurricane or tornado, the oil cooler isn't cooling anything.  It works like a radiator, heat is carried away by air flowing through the cooler.  How is it that an oil cooler (radiator) is cooling oil when there isn't any air moving over or through it?

Don't get me wrong, it will work while you're moving.  I have the cooler and I need lines and the valve cover and I'll install it on my 695.  I just don't see how it can cool anything when there's no airflow.

[teddy037.2]

OK, I'm confused.  Unless you're stopped at a redlight in a hurricane or tornado, the oil cooler isn't cooling anything.  It works like a radiator, heat is carried away by air flowing through the cooler.  How is it that an oil cooler (radiator) is cooling oil when there isn't any air moving over or through it?

Don't get me wrong, it will work while you're moving.  I have the cooler and I need lines and the valve cover and I'll install it on my 695.  I just don't see how it can cool anything when there's no airflow.

it also has more surface area to act as a heat sink...

+1 on the coolers, though. cheap insurance for the motor 

[DY]

OK, I'm confused.  Unless you're stopped at a redlight in a hurricane or tornado, the oil cooler isn't cooling anything.  It works like a radiator, heat is carried away by air flowing through the cooler.  How is it that an oil cooler (radiator) is cooling oil when there isn't any air moving over or through it?

Don't get me wrong, it will work while you're moving.  I have the cooler and I need lines and the valve cover and I'll install it on my 695.  I just don't see how it can cool anything when there's no airflow.

If thats the case, then my radiant heater should only heat my room up when its moving?

[eesnas]

OK, I'm confused.  Unless you're stopped at a redlight in a hurricane or tornado, the oil cooler isn't cooling anything.  It works like a radiator, heat is carried away by air flowing through the cooler.  How is it that an oil cooler (radiator) is cooling oil when there isn't any air moving over or through it?

Don't get me wrong, it will work while you're moving.  I have the cooler and I need lines and the valve cover and I'll install it on my 695.  I just don't see how it can cool anything when there's no airflow.

I guess the point to note is the bike is now typically around the low 200s whereas it used to float up around 280+ all the time...

[Punx Clever]

So here is an idea:

I havn't even got a chance to ride my s2r yet... but bear with me.  I know the oil cooler will work if no air is flowing through it (workin on an ME degree and love the thermo).  But, on the other hand, it will work much better if air is flowing through it (simple enough).  Say you ride in a city like Phoenix, very very hot, lots of traffic.  How much do you all think it would help to put fans on the oil cooler to push/pull air when not moving?  Fixing a problem that doesn't exist or legitimate idea?

[sbrguy]

So here is an idea:

I havn't even got a chance to ride my s2r yet... but bear with me.  I know the oil cooler will work if no air is flowing through it (workin on an ME degree and love the thermo).  But, on the other hand, it will work much better if air is flowing through it (simple enough).  Say you ride in a city like Phoenix, very very hot, lots of traffic.  How much do you all think it would help to put fans on the oil cooler to push/pull air when not moving?  Fixing a problem that doesn't exist or legitimate idea?

i thin if you were to put a fan or somethin gon the oil cooler that it would make a big difference if you were riding a lot in traffic, but with the cooler on my 620 now normally never goes above 240 on a bad day where it used to go up to 290 or even 300 on that same day.. if i had fan on the thing in traffic i'm geussing that 240 would probably even drop further down but that that point it would probably be overkill as 240 is a normal temp for the motor and not near damageing it in the 320 range or soemthing.

[Duck-Stew]

It's been tried by TurboMonster on his turbo-charged M900 and he said it was minimally effective.  Couldn't move enough air at a stand-still to have any noticable effect.

[booger]

The cooler the incoming air/fuel into the cylinder is, the more dense the air will be and more dense air does equal more power...  So, it's possible...

How would an oil cooler cool intake air or fuel? I thought it just cooled the oil.

[Geaux]

PM Motored-Sports for used oil cooler parts and kits.