Oil cooler

I got it in my mind that I needed a oil cooler to keep this bike cooler. When I first started riding this bike any distance it got really warm, and hot if not moving. I wasn't thinking about it being still new enough to be breaking in,  it only had 1000 kilometers on it then. I had read a few posts about others having to pull over and let their rigs cool off and I wanted to be able to avoid that situation! So I found a cooler with a fan on eBay and also got a spin on car type oil filter adapter and a oil pump for a turbocharger and made a independently powered and pumped oil cooling system. I wanted system that didn't use the bikes motor oil pump to pump oil through the cooler for 2 reasons; the factory oil pump is by no means a high volume type of pump, it's gears are short it is a direct gear pump not a concentric type with a rotor so its not a high pressure pump. I also wanted it to have the ability to cool oil when the bikes motor was off to help cool down after a very hot shutoff and on hot restarts. I will say that after installing a real oil pressure gauge that the readings I saw made me question the accuracy of that gauge! I know that a motor with roller bearings does not need much oil pressure or volume when compared to a motor with insert, shell or bushing type bearings. Dnepr crankshafts have roller bearings on the end mains and inserts on the large end of the connecting rods and bushing in the small rod ends with press fit piston pins. The camshaft has only roller bearings but has solid lifters that push oil down the pushrod tubes for rocker and valve lubrication not so much for cooling. So it needs some pressure and volume at the crank large ends out and just enough up to the cam to lube the lifters and relying splash to lube roller bearings. My Dnepr had no external oil filter from factory, it used only the internal centerfuge and screens to get the particulate out! With old style motor oil you didn't have the additives that include detergents to help hold in suspension the particulate matter so the paper oil filter element could capture it, this can some what defeat the centerfuge and allow fine light weight material to re-enter the lubrication system and be sent to the crankshaft large ends and cause excessive wear. I soon realized I seemed to be going a little O.C.D. on this as it was snowballing into a 

much larger project than I wanted. 

It does help with oil pressure when it starts to drop below 30lbs I turn on just the pump and it jumps up 15-25lbs. I have only used the fan a couple of times I got stuck in traffic and didn't move for a few minutes, it didn't seem to raise the oil pressure but the IR thermometer said it dropped the oil temp an additional 10 deg.

A kinda surprising thing is at high speeds (60-80kph) it not only raises it to around 50lbs but by the gauge it stabilizes the pressure too. 

I think the best part is the filter, easy to change and its gotta be better than just the centerfuge!

The pump I chose is Noisy, it's whine at idle can be annoying. I will try insulating the mounts on it soon. If I replace it I will find a quieter one.

If I replaced the cooler it would be with one half that size and no fan.

I am thinking I will move it forward and take the fan off, it hangs a bit low where its at and looks bad.