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Post by mcsqunk on Jan 20, 2016 3:28:33 GMT -5
I'm sure it's been discussed before but case mods.
Excessive heat buildup in the cvt causes slippage.
Holes cut into the case will allow heat to escape via airflow but will allow dust/debris.
You could attach a fine mesh inside the case holes to act as a filter i'd assume.
Has anyone done this mod successfully?
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Post by 90GTVert on Jan 20, 2016 7:48:26 GMT -5
I just leave mine open, but I know members have used screens in the past. I can't recall who now or find it with a search. At least one person used JB Weld to attach the screen to the inside of the cover. You don't really need a filter so much as protection from larger debris, but you could use a filter if you'd like. Some stock CVT covers for Minarelli engines have a filter over a large opening over the variator. Some of the same ones then have an opening by the clutch with no filter at all.
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Post by dav3titus on Aug 13, 2017 21:57:00 GMT -5
I just modified my case- took and drilled holes in it,making darn sure to de-burr everything when I was do9ne   |
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Post by superonehanded on Mar 17, 2018 23:48:17 GMT -5
So is venting your cover best in hot places ... if I plan on maybe some dirt road with puddles should I just leave it not vented or maybe snorkel style it
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Post by 90GTVert on Mar 18, 2018 6:56:55 GMT -5
If you're going to be doing hardcore off-roading or treating it like a boat, then leave it sealed. For regular use, I haven't had any real issues with large vents in the CVT cover. I think it's good in most climates that people would actually ride in.
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Post by Happypancake! on Mar 18, 2018 7:33:48 GMT -5
 Run mine like this. |
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Post by mrkswthwrth on Mar 20, 2018 11:04:11 GMT -5
Thats pretty slick Pancake
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Post by dexameth on Mar 20, 2018 11:21:50 GMT -5
I run mine completely open. I cut the portion of the stock cover that holds the bendix in place, and bolted that on. I ride hard, off road, all over and haven't had any issues in over a year of riding like this. This is on my QMB139 long case. I live in mid Florida and in the summer I was noticing a lot of slippage... I even ride in the rain like this (not intentionally) and still works fine. I'll post a pic if I can dig one up here.
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Post by dexameth on Mar 20, 2018 12:32:05 GMT -5
Here you go.  |
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Post by 90GTVert on Mar 20, 2018 13:27:13 GMT -5
One downside of essentially no cover at all is reduced strength of the cases which act as the swingarm. We have had members break their cases down the center of the CVT when using no cover or split covers. I'm not saying it will happen to you, but it has happened. The first I recall happened on a 2T engine (1E40QMB) and it broke during a turn and caused a crash. I think you can vent CVT covers in a way that they still add strength and don't significantly increase temps vs no cover. That would also potentially let you keep a kick start for emergency use and have more of a shield to keep your ankles out of moving parts.
One other issue with any cover with large holes or no cover is that parts may go missing after a failure. Don't tighten a nut quite right? It's likely gonna be gone. Covers with some types of venting may retain some small parts.
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Post by dexameth on Mar 20, 2018 16:03:53 GMT -5
Yes, you're right, 90. I've done both, not tightened the clutch and the variator nut, both at different times, lost both. I did recover the variator face, but had to walk home. When the clutch bell came off I watched it pass me and then cut across 3 lanes of oncoming traffic and I just thought "damn, I'm gonna have a bumper or fender to fix in about 2 seconds..." and it froggered all the way across then jumped the sidewalk and disappeared in a water retention pond. Luckily, 2 miles from home again, walked it.
I don't worry about cracking the case, I jump, wheelie, curb hop, still strong to this day (but I have cracked frames!).
I don't recommend this to anyone, as cracking can occur but I've only seen it on GY6 motors running a single shock. I did worry about this one breaking but it hasn't yet.
As to the kickstart... meh. My backup sits in that little bag under the seat. A pocket jump starter that HAS saved me more than I can count (was dealing with a bad battery for a while).
Again, for anyone that thinks about doing these things... this is my toy. I don't rely on Scootie for transportation (all though it's my funnest form of doing so), so if I break something than I can pedal a bicycle or ride my 150 while I fix up Scootie again.
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Post by tiny on Mar 20, 2018 16:21:15 GMT -5
Here you go. You must have really rough roads all the Plastics fell off  Nice scoot. |
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Post by pinkscoot on Mar 20, 2018 16:31:51 GMT -5
The Piaggio 4 stroke 50cc CVT has a hose on the front as an intake and then has openings in the back behind the clutch. I'm sure it provides plenty of ventilation and keeps things cool.
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Post by dexameth on Mar 20, 2018 16:41:46 GMT -5
Here you go. You must have really rough roads all the Plastics fell off  Nice scoot. Haha! Thanks man. This thing has brought so much fun... and here's the story: I had just learned kneelies (wheelies with my knees on the seat, toes hanging off the back). I found a nice gradual uphill to try it on, and had it held perfectly, until the speed bump. One of the longer, rolling styles I thought I could make it over on just the back wheel. As I came down the back side I looped out and slammed the scoot on the ground, breaking all the right side plastics. I got home, thought of 90's naked scoot and tried it. I love it! I do want my stock seat bucket back... this little seat was only temporary and I never got around to replacing it haha... all in fun. |
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Post by scootypuffxl on Jun 29, 2020 17:00:11 GMT -5
 Gave mine the chop a while back, no big problems |
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Nice scoot.
Nice scoot.