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Post by carasdad on May 17, 2013 12:48:27 GMT -5
Ok..ok...I give up..can't figure this out! causes 'Belt Slap'? Replaced old belt cause it was slightly frayed and cracking. Replaced it with a new Gates Powerlink 788X18.1X28. On acceleration..'slappidy slap slap' against the insides of the CVT cover.Try a cheap Quiinjang 788x17v28...same thing. So in goes a 788x17x28 Bando...guess what?.. SOS again. Put the 2 miles or so from breaking old belt in..runs quiet as a mouse. Problem I have with belt slap is that I can see where it rubs the case...and wears the belt. After only a few miles on each belt..ya can't read the markings on it anymore. So I would not EVER expect one to last 500 miles like that. NOT EVEN the Gates or Bando. Has there been new technology since last summer...whereas they now make belts larger and looser than actually marked? CVT and Torque Driver are perfectly fine. In fact I even swapped in new NCY 2T Torque Driver assembly and Koso CVT. Has me way confused. Scoot came with a 788X17X28 belt. Replaced it with the same and the CVT cover sounds like the belt is split and the flap is whacking the cover...  ......  |
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Post by alleyoop on May 17, 2013 13:12:24 GMT -5
Try a new contra spring and or new sheave if either is not releasing smoothly as the belt drops in the variator the Cluch pulley is not closing fast enough to pick up the slack.
Alleyoop
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Freshman Rider
Currently Offline
Posts: 56
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Joined: May 14, 2013 22:50:01 GMT -5
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Post by chihuahuas on May 17, 2013 13:12:42 GMT -5
did you check/inspect the rear pulley for wear/loose/wobble/excessive slider bearing clearance.
That is suspect number 1
worn bearing surface too much wobble.
These things don't hold up past 4000 miles very well. The grease dries out and water gets in and they go bad real fast. Sucks basically, but it is the way they are.
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Post by carasdad on May 17, 2013 13:30:04 GMT -5
Contra Spring is a new 1.5K one. But even new things these days arrive as no good. Did wonder about the slop and dryness of the rear sheave...even with the new NCY Torque Driver halve on it. Cleaned it..lightly lubed the proper areas before install. Odd thing is the old worn belt is happy with it...while the brand new premium belts slap all over inside the CVT cover. Maybe the old one is worn...so it slips a bit..and new ones are trying their @sses of to grab the rear pulley(with a bit of slop in it) Maybe a new rear assembly is in order.Crazy part..they charge more for just the back half than the whole pulley(both halves)...and some even less for a complete one with clutch and bell..  Just under 2K on this 2T..but it is purdy hopped up. i.e. 0-50+ in about a football field length. ryan on here will tell ya..my 0-30 is like 25-30 feet. So probably premature wear. Another reason I am trying to up gear. When riding I feel like Don 'The Snake' Purdhome...or Shirley 'Cha Cha' Muldowney. (GREEN!..varommmm.....varommm) Gone...  |
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Post by carasdad on May 17, 2013 20:21:12 GMT -5
No other ideas or input?.. Chihuahuas..I think you are onto something though. Somebody..3 in fact said my belt was too big. But if a Minarelli long case comes stock with a 788X17X28 belt.. and it is replaced with 3 brands of the same exact size it came with... and has belt slap with the new ones... How can the belt be too big? |
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..BAD TO THE BONE..
