CVT overheating By motley (Read 3,014 times)

[czmdiver]

I spent more years than I want to remember in the Power Equipment field and worked with Lots of Belts, Heat is the Enemy of the Belt.
You can buy these very accurate Laser temp gauges most everywhere now for under $30. No Guessing if something is genuinely running Hot or Cold..

I do the Anklebiter thing..

[snaker]

Jun 16, 2018 17:41:44 GMT -6 czmdiver said:

I spent more years than I want to remember in the Power Equipment field and worked with Lots of Belts, Heat is the Enemy of the Belt.
You can buy these very accurate Laser temp gauges most everywhere now for under $30. No Guessing if something is genuinely running Hot or Cold..

I do the Anklebiter thing..

Whats up with the zip tie on the gearbox input ahaft?

I tried to zoom in on it and it appears that the shaft has a extension that would typically set in a CVT cover support bearing.

Would that be the case?

[motley]

Timing chain sorry.

Two belts killed today. I did a few assumptions.

I installed a valve cover with a egr setup. In theory from the camshaft down to the varriator gets really hot.. It can't vent in any fashion..

But now it can.. I think there's bigger temperature changes. Only downfall is I now have a backfire.. And the bike sounds like a dirt bike now..

^ Is anything I did bad?

[snaker]

That area gets hot because its a combustion engine.
It is a fan cooled engine consisting of a fan and specifically designed shrouding to remove the engine heat properly.
I hope you haven't left that shrouding off.

[motley]

Nope. I've been pretty on point about that part of the system .

[motley]

My problem seems to be practically fixed. Is there a way to vent that area better? Some race cars happen to have open valve systems.

If I could practically do that my entire problem with heat would be gone.

BTW. I was going to drive it without the CVT cover, but the crankcase is so thin without it. I feel like the cover reinforces it.

With the roads I live on I swear I feel like the CVT area would break off the crankcase causing me to die.. Lol...

[motley]

The problem still exist. But the belt did indeed last longer.

I contacted partsforscooters via voicemail, where I ordered the engine asking if there's anything I can buy from them to fix be able to fix it. To possibly some type of rig.

Hopefully, even though there's no warranty, they can help me configure something out. That's what I pray for.

I can't afford to keep breaking down every 10 miles due to a belt getting destroyed . The company I work for just promoted me to management, and I have to drop off bank deposits every morning.

[motley]

My next tackle is my oil pump I guess..

[rks]

It may be helpful if we knew what scoot you have. I am confused.....your problem is belt destruction...right? Then you mention an EGR head, something about a timing chain, and an oil pump.

Breaking belts as you describe is caused by something behind the variator cover......not some other engine part. Sounds like it is being cut down by something, don't know how it's possible to burn a belt off in just a few miles.....there would be a lot of blue smoke before belt let go.

[czmdiver]

Jun 17, 2018 19:30:11 GMT -6 motley said:

My next tackle is my oil pump I guess..

Breaking Belts has nothing to do with your oil pump. The Oil Pump is inside the engine and if it failed you would have seized your motor, Even heat cause from a failed oil pump will never be able to get the belt hot enough to break one.
The Cam chain is also inside the engine, hacking some hole in the engine of the sake of the chain do some kind of cooling is just plain silly. you"ll fling all your engine oil out in short order and again the cam chain has nothing to do with breaking belts.
Your engine won't ve able to run hot enough to transfer that much heat and break belts.
Parts for Scooters won't be able to help you, you had to either swap over your old assembly or buy a complete new one and install it. in the past you mention you had 38,000 on the scoot? so you swapped over the complete assy that had 38,000 miles on it? and I can't stress again posting up some pictures there is not vey much we can do with descriptions.
The other thing is with that new engine there is only one belt that fits it and you were jackin all over the place with belt width's and lengths so who knows what belt you are running and if its correct..
Your issue is with the CVT assembly indies that cover so stay were the problem is.

[motley]

I'm having issues uploading all of the photos I've taken sadly.

But I did get a response from parts for scooters. One thing they told me is I'm running the wrong belt.. I told them I took the CVT cover off when I got the motor to be able to take a picture of the belt size for easy documentation.. Also so I wouldn't bother them.

Originally it was a 723. There telling me it's a 729 belt.

He also said to consider changing the engine oil back over to 10w 40. I've always ran gtx 10w 30 in all of my scooter engines. But I'll take his word for granted.

Did a lot of research and ordered this for oil www.amazon.com/gp/aw/d/B001KNYMQO/ref=ox_sc_act_image_1_1_1?smid=ATVPDKIKX0DER&psc=1

Bbk is definitely broke in, and I personally trust Lucas oil.

Yeah the scooter body it's hit's a decade old in may. Anything major has been swapped out.

He ensured to me if the oil pump was bad I would of found out the hard way the first 10 miles, plus the constant running during break in.

I found some super cheap 5 dollar belt to go along with this that's a 729. If it'll hold up. I'll get a name brand one.

I'm feeling confident over the oil and belt now. Hopefully that goes well.

[motley]

As for the egr. Might of been pure luck

[motley]

czmdiver I'm beyond 100 percent sure I found out the problem. Whenever the variator engages, the more it does my belt starts turning sideways, it'll get so bad it slips and losses power.

Thus I don't think it's heat, but that it's the belt trying to completely spin sideways. Eventually eating into the belt, which there's your slip "no teeth". To eventually destroying belts..

[czmdiver]

No, you have found the belt turning thats all, The Problem is what is causing the Belt to turn, they just don't do that on there own something is causing this.
And you were just informed you have been using the wrong belt so I don't see how you got the correct one on so fast and already having problems with it.
If the Belt is Already Junk it will turn thats about it.
And without Pictures its darn near impossible to help from this point, its just something that we nee to put a bunch of Eyeballs on..
Good Luck

[motley]

Yes, the belt is turning. Tested with the rest of the belt's I have. I even tested the original belt parts for scooters sent on the bike. And that's a 724 >.<. I managed to originally put 5,000++ miles on that belt with ease. It's odd the belt tried doing the same thing..

I just put the 729 belt on the bike but as soon as I went to test it, it started raining like a hurricane.

The 729 belt does not seem to sit flush with the outer pully of the clutch. Of course all I did was rotate it. Never started.

One person told me my worst fear would be a bent shaft.

My thought is regardless the the belt sizes. The clutch might not be engaging at the right times for the varriator, causing the belt to snag.

I just hope my problem is fixed.

I'll update when the rain let's up for a bit.