Helix Clutches

My old clutches had 20,000+ miles on 'em and needed replacement. All 4 surfaces were worn beyond Honda's serviceable limits. The rear clutch bearings were bad - you can hear them in the video. Scoot stuttered at take off (under 13mph).
Installed new clutches (came with 19g weights) and new belt (Gates Powerlink 828 22.5 30) on 1995 Honda Helix. 1st test ride was very short - ran it up to top speed of 50-55 (old clutches and belt managed 65+ and used 23g weights). Went back to garage to install 23g weights. On 2nd test ride the belt self destructed after 2 miles at 55mph top speed.
I made this video with the parts in their current state (new rear clutch bent - old belt).
My theory is it was caused be heat - but what caused the heat?:
- was the clutch wobbly when installed? I did not check before test ride.
- proposed by the seller of clutch: I made mistake on torquing clutch nuts. I used a torque wrench and the lower numbers in the service manual.
- new belt had not seated yet so was slipping and heating up?
What do YOU think?
I use this scoot on the county roads a lot - 55-65 mph for hours. I would like to get rid of the acceleration flat spot at 35-45mph without losing top end speed. I am currently leaning towards Dr pulley sliders 24x18 20.5g as recommended here:
scootdawg.probo...
What's your opinion?
Obviously I won't get to play with sliders until I get the clutch issues resolved. So I still need a rear clutch assembly and a new belt but want to be sure that is the only issue here before I spend more $$.

[@bbishoppcm]

Where did the clutch parts come from? Those look like aftermarket/Chinese clutch parts to me. Those parts don't conform to the quality control requirements the Genuine Honda parts are made with.

[@evdallas3847]

aint no honda part gonna do that

[@505197]

First of all I doubt your flat spot is due to the clutch. I'd bet by the time you hit 35 mph the thing is already in "high gear" with the pulleys having reached their limits. If the thing was slipping it'd probably be making enough smoke and stink that you'd notice it. I'd say the aftermarket stuff was crap from the git go. The flat spot is probably a carb issue, cleaning it might clear it up.

[@gabriele8755]

Hi, I wanted to ask you, have you ever had starting problems with the clutch tearing with this scooter both cold and hot. Mine tears a lot, I wanted to understand if it happens to others too, thanks

[@garywest3763]

That New clutch is Not very precision. Is that new clutch Chinese? because that is perfectly acceptable as Chinese precision. But Not acceptable as Japanese, German, or American Precision.

[@mikekosar6135]

Nothing more frustrating than waiting for parts ordered , Finally receiving parts... Then upon installation.. poor quality..

[@miguel360kmc]

Is this the Qlink? Or just helx type? I have the tomberlin rcx250 same as mc-13-250 and very much need to fix cvt

[@evdallas3847]

use genuine honda parts on a honda!