Lets talk Belts By damin69 (Read 1,956 times)

[damin69]

While I was Adjusting Valves and checking things out to find out where the weird sound is coming from on my Scoot I took off the Variator cover to check the Clutch and Variator for noise also.

So with the cover off I wanted to check the Belt out. I was surprised to find that it had a GATES Powerlink belt on it. So that was a good sign. Now is where I am trying figure out. Now I have seen most of the posts I have been seeing mention 842 23 and 856 23.

Mine has a 918 22.5 Im am thinking wow this is LONG.

So is this a common length on the yy250t with the 244cc?

I did not pull of the Variator to check the roller weights yet. Want to figure out my motor sound issue first.

[Cruiser]

That's what I have on my YY250T. Came with the Gates Powerlink. It also came with 24 gram weights (23 x 18 mm). I went to Dr. Pulley 19 gram sliders. Very happy with the performance.

[Alleyoop]

8" LONGER!!! Than thats what a call a LONG CASE. Has to be the Clutch and Variator are much bigger in diameter.
Alleyoop

[doakley]

I have the exact same belt in mine. Recently I noticed the belt is making a slapping noise when I accelerate from a stop. I'd have to accelerate until it starts slapping, ease off the throttle, then accelerate again to get it up to speed.

I pulled the CVT cover off and I can see rub marks on the top and bottom edges of the cover, like the belt is slapping against it. The scooter only has 3000 miles on it so I can't believe the belt is worn out.

Any ideas what can be causing the belt slap?

[Cruiser]

My belt has slapped a little on the bottom of the case from day one. Has anyone tried the 906x22.5x30 belt? I would think this shorter belt might eliminate the slap if it fits. This belt is normally used on some 150cc scoots.

www.monsterscooterparts.com/90sccvtbegap.html

[doakley]

I measured the belt today and it measures 22 mm wide. Could the slap be caused by a problem with the variator? Like if the rollers didn't move out quick enough? If that happened the pulley by the clutch would be opening up before the variator took up the slack thereby making the belt slap. At least that's how I'm picturing it happening.

[doakley]

In attempting to figure out why my belt was slapping, and getting worse every day, I took apart the variator. My thinking was they weights weren't moving out fast enough. Cleaned all the Chinese tar out of there and put it back together and it didn't make any difference.

Next I decided to take the clutch end of the drive-train apart. And that's where I found the problem. They used rivets to attach the aluminum pulley plates to the stainless main assembly. One rivet fell out in my hand, 3 more are hanging out 1/4", and the other five are flopping around in there. The inside end of the rivet extends through the pulley plate to where the belt rides once the clutch engages. The edges of the rivets where like teeth, grabbing and chewing on the sides of the belt. Both pulley plates are barely held on and just flopping around.

So now I need to replace the clutch/pulley assembly and the belt since the sides of it are all chewed up.

[swh22]

That sounds like my problem!!! I have a Znen 250 and it came with a 918-22.5-30 belt,I changed it to a 906-22.5-30 belt and installed 21gram dr. pulley sliders!!! I'm having variator noise also I'll let you know what I find!!! I'm fixing to go wrestle with it right now!!! lol!!! stock weights probably 23gr. or better on mine!!!

[Cruiser]

Check my post on your thread.

scooterdoc.proboards.com/index.cgi?action=display&board=250cc&thread=2788&page=1