Quick and dirty CVT air intake By looker (Read 2,435 times)

[looker]

Hi guys,
something I wanted to do while the scoot is in pieces, add some sort of air intake for the CVT cover. Just struck me as a bit weird that the intake is sat behind one of the lower panels with not much air flow to it.
This is what I did with a piece of 1.1/4" plastic pipe,





it runs alongside the frame rail from the vent behind the front wheel,






heated it so I could bend it into shape, not the best as it tends to crease and fold in on itself. This would have been better using some sort of flexible cold air intake for car filters, but I'm that broke I had to do it like this.
Oh yeah, and I had to remove the side stand, never used the thing anyway

Mike

[Bong]

Does it seem to work?

[looker]

I'm still working on the scoot so hav'nt been out on it yet, but I'm hoping that come the summer months it will at least provide some fresh air to the variator and clutch. I would imagine it would at least do that, the pipe has some kinks in it, but nothing bad enough to stop air flow.

[♔Big Guy♔]

There is a purpose for the indirect air intake design. It keeps out the road grime, dust, pollen, rain, etc. You might have enough distance to accomplish the same thing with your mod, but I would watch it carefully for the first few months to make sure you don't pick up road grime in the CVT.


-Rich

[sprocket]

You are pushing air into an almost enclosed space, there would be no cooling advantage...

To get better cooling you need to also increase the size of the small exit slot on the bottom of the CVT. Some people drill exit holes in the rear of the cover and glue a window screen on the inside.

Not certain it is of any benefit...

[looker]

Well I can tell you that it has made a real difference to the temperature of the CVT cover, I can hold my hand on there after a long run without having to snap it back due to heat.

Not a good picture but the only one I have to hand,



inside the red circle and crudely drawn in in green is the outlet at the rear.

And due to the fact that the only 115mm variator fan I could get that was'nt over priced is very much like this one,

cgi.ebay.co.uk/perforance-Variator-GY6-125-150-Kymco-Vento-SYM-/180658011131?pt=UK_Motorcycle_Parts&hash=item2a100e7bfb#ht_1640wt_825

I thought I had better do something to help that fan due to the smaller blades.

CVT cover has been off a number of times and it sure looks cleaner than it did before this was done, and it's had close to a 1000 miles put on it. I thought the removal of the foam filter/screen at the intake of the CVT was a common recommendation? The one on mine was certainly full of crud and impeding airflow it was so bad.

Believe me, you could not even touch the CVT cover before I did this.

[sprocket]

Cooool!

[95civicsi]

Dec 27, 2010 15:50:18 GMT -6 looker said:

heated it so I could bend it into shape, not the best as it tends to crease and fold in on itself.

If you fill the PVC with sand while heating and flexing, using caps to keep it in, you can flex the pipe without kinks or folds. I've heard of springs being used but I think sand is easier to come by.

[sprocket]

You can use packed sand to bent any pipe...it must be dry and packed tight... we used to bend stainless steel pipe like that...