CVT Cooling Mod

[magoconnor]

Hello. 

I found this thread : scooterrebels.proboards.com/thread/110/increasing-cvt-cooling
The guy removes alot of material from the inside of the cvt case, to improve cooling. 

I also found another guy doing the same thing, and saw some reduced heat both inside the cvt case,
but also reduced engine temperature.

What do you guys think of this mod? 

[90GTVert]

Probably works well, but venting the cover is way easier and also effective. No power is used driving a larger fan.

[GrumpyUnk]

Be aware that if you skinny out the CVT cover, you run the risk of collapsing the right side of the case. The cover forms part of the structural strength, forming a 'tube' of metal when bolted to the right side case.
Take a look at the inlet to the CVT, at the front. Many have a tube that has a screen. Check the screen for pluggage. I have seen them pretty well plugged with road 'stuff', so the incoming air to cool things is definitely limited. Worth removing and cleaning the screen. I would not remove the screen, but might go to a larger mesh, as I suspect small pebbles could get in and mess things up if it was not there.
If one were available, I would certainly install a larger 'fan' on the face of the variator. The white plastic ones I have seen have minimal depth to the 'blades', such that I question how much air they move. If the blades were made deeper, I think the air flow would improve at minimal power consumption. Or not.
It might pay to investigate looking at the CVT cover with the idea of changing its shape so that it uses the variator fan(such as it is) to pull cooling air into the CVT, and push it out the vent at the back, near the clutch/torque drive. There is a vertical vent on most covers(all I have seen) that would allow pumped air to exit with no problem. It would not be crazy to create an opening on the side of the cover, as close as possible to the 'center' of the variator to allow air into the 'suction' area of the variator fan. Minimal reduction in strength of the cover if the hole was created as two 'half circles' with a 'bar' across the center, ending up looking like the 4WD freewheel/lock knobs on a 4WD vehicle.
tom