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night flyer

look I am going to get tired of this nonsense pretty quick.
again you are posting without do diligence
stop correcting me until you can bother to actually be correct
I am talking about a jammed cam on the rear pulley,
the DRIVEN pulley
the variator is the driving pulley
the contra spring is what controls belt tension and the clamping force pressings on the sides of the belt
it does it in two ways, by allowing the belt to move to an area of
the variator with more contact surface and by shifting the drive ratio to prevent high RPM and therefore high centrifugal force

if it is not allowed to perform this function belt clamping force will
grow exponentially compounded by too small clamping area
this does not crush the belt instantly but it does build heat fast enough to cook the belt.

sand the armature with 2000 grit sandpaper till smooth and clean the oil completely off with carb cleaner break cleaner or by preference actual electric parts cleaner

if the brushes still make good contact it should work again.
or
a completely new starter can be had for less than $20


www.amazon.com/Teeth-Electric-Starter-Motor-Scooter/dp/B00FFDV7LI/ref=sr_1_4?ie=UTF8&qid=1509865427&sr=8-4&keywords=gy6+starter

the wire that goes from the battery to the relay to the starter can be upgraded for not much $

Does the electric start seem sluggish?
if it kicks well but the electric is not enough.....
It seems to me like your leg is providing more power than the starter
so get the battery checked for cranking amps with a carbon pile load tester. it should be free at most places that sell batteries

when you had the cover off for the valves did you check the springs to see if the inner spring is wound in the same direction as the outer spring?
I had the same problem with my scooter and could not find the cause until the springs bound up and shattered the outside spring. What a mess that was. It's very similar to what my scooter was doing so I think it's worth a look

You got solder...You lucky dog you, all I got was tittle copper wire crimps

I think you have that backwards
The 835 is the shorter belt and gives higher gear
And the 842 is longer and gives lower gear

And yes you can compensate for the change somewhat with veriator weight though the launch will never be as brisk with the short belt

If you have been using the longer belt for a while it can leave
A groove in the cams of the driven pulley
switching to the shorter belt means the rollers need to overcome the bump
this results in excessive squeezing of the belt and low power do to poor efficiency
Until you get over the hump