Last weekend I've been busy again with the cooling for the motor. The 3 fans I had placed below the motor I turned around so they draw out air from the motor.

The in-line blower I also turned around so it's blowing cool air into the motor. Ofcourse I needed an air filter for this so I went and bought a big one that has the same diameter as the fan itself. This is what it looks like now.

I turned on the in-line blower for a short moment to test how much air would come out of it. And I was very pleased with it, I was just blowing away everything that was lying on the floor. Since it's going from a big to small diameter there's quite some air pressure. After this I placed the whole thing on the quad bike again and when it stopped raining outside I went for another test run.

Ofcourse I expected it to work a little better than how it was before. With the blower on I actually felt air coming out of the motor. The air is being blown everywhere through the motor now and also passes the brushes so they're being cooled constantly. But during testing I just couldn't get the temperature to go above 51 degrees celsius. Every time I let go of the throttle I saw the temperature drop below 50 degrees celsius again. And when I stood still for a moment the temperature dropped to 30 degrees celsius within just a minute.

It actually seemed too good to be true. So I went for another lap after this and now with full power while accelerating. Again it didn't go above 50 degrees celsius while during the last test run it actually was at 73 degrees celsius and that wasn't even the maximum. But that 50 degrees celsius actually does seem to be the maximum temperature now for normal driving. Ofcourse it probably will be a bit higher if I really use that full power a bit more but if it drops down to 50 degrees celsius again after that then I'm more than happy. So I think I can say with some degree of certainty that the temperature problem of the motor is finally solved! :)

I now still want to try removing those 3 fans below the motor because I have a feeling that these aren't really helping that much and that only the in-line blower will be enough. Also still have to see how I can properly mount that in-line blower. I definately want to place some rubber inbetween since it vibrates pretty much.

I also want to ride a longer distance now to see if the temperature will actually stay around that 50 degrees celsius, even with 80 km/h (50 mph). But I don't really expect any problems anymore with the temperature now.