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Post by musturbo on Mar 21, 2012 19:52:31 GMT -5
Long story short i shredded the belt the one day I drove the scoot to work. When I got it home, the belt was gone, the front outer variator plate was missing fins and spun freely, the rollers were melted, and the rear pulley was covered in rubber. I currently have a stock belt with a polini clutch, stock variator with 3.5 g weights. Was thinking of going with a Dr pulley variator with 4g weights for a little quicker acceleration. i did some searches and was hoping for some input. Thanks everyone
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Post by Deleted on Mar 21, 2012 20:08:16 GMT -5
what day-to-day load is being applied?...in other words....what is the weight of the primary rider? whats the mileage on the broken belt?
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Post by jmkjr72 on Mar 21, 2012 20:24:33 GMT -5
i would check to make sure the belt is running true and that there are no defects on the rear sheaves
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Post by 90GTVert on Mar 21, 2012 20:46:47 GMT -5
I'm guessing you've broken the key that locks the vari on the crank since it spins freely. Coulda been before or after the belt went. Inspect and clean everything thoroughly. Make sure you use a good belt like a Bando. Don't use the no name belts, they don't hold up the same.
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Post by Deleted on Mar 21, 2012 21:21:27 GMT -5
I'm guessing you've broken the key that locks the vari on the crank since it spins freely. must be a 2t thing? havent seen a 4t with that yet. |
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Post by 90GTVert on Mar 21, 2012 23:59:27 GMT -5
The 4Ts with the minarelli transmission have them, but yeah, basically. The key fits into a recess in the fixed half and meshes with the splines on the crank.  |
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Post by reveeen on Mar 22, 2012 1:44:59 GMT -5
I've been *thinking* about this belt shredding thing (having never shredded one here) and it seems to me:
1) not all belts are created equal
2) pulling a random spacer out of your front variator can throw things off a bit
3) there is a break-in period with a new belt
4) if the crank bearing is on it's way you get a lot of extra heat where it's not needed
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Post by 90GTVert on Mar 22, 2012 9:24:21 GMT -5
I've been *thinking* about this belt shredding thing (having never shredded one here) and it seems to me: 1) not all belts are created equal Definitely agree. The no name stuff is complete junk IMO. 2) pulling a random spacer out of your front variator can throw things off a bit Haven't had trouble with just removing the spacer in some 1E40QMBs stock. When you go playing with drive boss length and angle of faces and things like that, I know for a fact you can manufacture a belt buster. I've done it. 3) there is a break-in period with a new belt I treat them like pretty much anything else. Install then WOT. I've busted more than my share of belts though. 4) if the crank bearing is on it's way you get a lot of extra heat where it's not needed Makes sense. Another thing that seems to make a lot of heat is a clutch that engages late. All that slipping. I think all CVT covers should be vented in some way unless you're gonna ride through standing water or go mud bogging or something you probably shouldn't be doing anyway. Any heat you can keep away from the belt will help. |
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Post by larry001964 on Mar 22, 2012 10:00:29 GMT -5
Cheap Belts = Pushing your scoot home. :crash:
Bando or Gates = Riding your scoot home. :riding:
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Post by musturbo on Mar 23, 2012 17:53:49 GMT -5
200lb rider, 3500 miles total on belt, about 50 miles since all the mods. Guess i can't complain. Bando or Gates belt it is, Thanks everyone for your help.
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Post by musturbo on Mar 23, 2012 17:56:06 GMT -5
I have the clutch set at a pretty high rpm too, no vents.
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Post by larry001964 on Mar 23, 2012 18:57:28 GMT -5
If you have reason to believe the failure is heat related it may be wise to cut some vent holes. Your really the only one that can make that call. But if it melted the cooling fan then I tend to agree it's getting too hot.
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