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Post by scootershawn on May 16, 2017 10:53:17 GMT -5
Hey guys, can someone post a link or 2 on pro's, cons and methods on venting cvt covers? I have been running higher rpms with my lighter slider weights and the 1500 rpm contra spring. Finally shredded my rather new Kevlar belt yesterday and thankfully kept the old one for backup. Took it back to all stock except the 6g slider and everything seems fine. Just considering venting the cvt cover. Thanks!
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Post by 90GTVert on May 16, 2017 12:08:36 GMT -5
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Post by crawford on May 16, 2017 12:26:01 GMT -5
If you are have belt problems you should check all moving parts of cvt venting must likely a now issue
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Post by greggkinney on May 16, 2017 14:04:39 GMT -5
i run a completely open cvt without problem
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Post by AtariGuy on May 16, 2017 14:26:18 GMT -5
The pros to venting a cvt cover are huge in maintaining performance through your ride. As an example, my wife and i both took a mothers day ride for 40 miles, backroads and scenery. Her cvt isn't vented, mine is open in the front. I didn't have much fade in the springs, but hers did. It got very sluggish and shifted into high gear too soon. It was from the excess heat trapped in the cvt, and that heat causes the springs to soften.
The cons though are environmental. With an open or vented cvt, you may get dirt, debris, bugs, and rainy day moisture in your pulleys which can cause parts to wear sooner, or a glazed belt could slip when wet.
Your decision on venting depends a lot though when and where you choose to ride. If its a daily commuter and chances are much higher you'll ride in rain, or you live down dusty gravel roads or nearby swampy areas with loads of bugs, you might want to consider that before venting.
Or get a second cvt cover, use a vented one for longer joyrides on warm sunny days, and keep a closed cover for the other rides.
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Post by niz76 on May 16, 2017 14:28:30 GMT -5
I've put many many miles on my vented CVT cover with nary an issue. My scoot was my daily driver for a very long time and Occasionally during a real heavy downpour if I had to ride through a deep puddle, my belt would slip but only for a second and back to normal again. It was pretty rare that I ever had to ride through water that deep but that's the only issue I've ever encountered with my vented CVT cover. The CVT parts stay so much cooler (and that's kinda a big deal) there's really not much- if any- downside to CVT venting at all! (imo)
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Post by spaz12 on May 16, 2017 14:52:08 GMT -5
I've put many many miles on my vented CVT cover with nary an issue. My scoot was my daily driver for a very long time and Occasionally during a real heavy downpour if I had to ride through a deep puddle, my belt would slip but only for a second and back to normal again. It was pretty rare that I ever had to ride through water that deep but that's the only issue I've ever encountered with my vented CVT cover. The CVT parts stay so much cooler (and that's kinda a big deal) there's really not much- if any- downside to CVT venting at all! (imo) +1
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Post by 90GTVert on May 16, 2017 15:02:44 GMT -5
I don't use anything but vented covers and the only time I get slip is stuff like the vid below and even then it lasts 10 seconds and then it's fine again. If you do much riding on roads like that, trade the scooter in for a kayak. That's more than half a foot of water. Did the same thing yesterday and it didn't slip, but I went a little slower and didn't splash it around so much. With 120/80-12 tires on the back, it takes 8.5" of calm water to just touch the lowest point of the cover and about 10" to the lowest vent, but it would come in the seam between case and cover anyway unless you actually seal it (I don't run gaskets on most of mine).
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Post by jstich on May 16, 2017 17:36:29 GMT -5
My cvt cover had a plastic panel over the cvt cover itself.Taking the plastic cover and venting the cvt cover was my first mod.Didnt really give it a chance to fade without the vent holes.Got 7000 kilometers on stock belt.Stock clutch still too. I got new rollers but the stock ones and the rest of the vari look great.
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Post by 2stroked on May 16, 2017 19:27:49 GMT -5
My Honda Helix CVT cover is vented into the breather box. Another thing that I love about the Helix cover is two bolt removal. The Cyprus has a large 3-4 inch diameter hole in the front over the vary itself with a plastic scoop and filter covering that keeps things out. My point is, both of my 250 4t scoots have factory vented CVT covers. I don't believe it to be a coincidence. They are that way to keep the CVT parts cooler. I vented my ETon CVT cover as well. There was a well respected and knowledgeable member hee thta wanted to or did ( ) vent their CVT cover and connect tubing from the engine fan to the ecvt cover to aid in cooling while stopped even. I always thought that to be a good idea, and cen planned dto do that totnhe ETon as well..
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Post by scootershawn on May 16, 2017 20:18:45 GMT -5
Thanks for the info. I'm gonna drill some holes this weekend. I'm pretty sure the long distance I rode plus having that tighter contra spring helped melt the belt. That little fan blade that sits on the front if the variator also got broke and melted so I ordered an new one off Amazon with a Kevlar belt. I'm sure it helps circulate air in the box and I'm only riding to work tomorrow night for about 5 miles or so.
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Post by scootershawn on May 16, 2017 20:22:02 GMT -5
Oh one question. .. my taotao 50 cvt cover has those chrome looking Allen bolts in a semi circle over the bell area. Do these serve any purpose or just decorative?
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Post by 90GTVert on May 16, 2017 21:24:02 GMT -5
Oh one question. .. my taotao 50 cvt cover has those chrome looking Allen bolts in a semi circle over the bell area. Do these serve any purpose or just decorative? No practical purpose. Decorative.
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Post by scootershawn on May 16, 2017 21:27:02 GMT -5
Yeah I was thinking that but making sure. Looks like a good spot to open up for ventilation. Thanks
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Post by chopsuwe on May 17, 2017 0:50:34 GMT -5
I have no idea of the benefits. Logically you'd want to keep grit from grinding the belt and drive faces. Mine has a vent hose from the fan to the case. There is no filter on it and the case is pretty clean inside. Vent at 11 o'clock position.
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