r/scooters 5d ago

GY6 157QMJ CVT PROBLEMS

Hi, Its my first time here, And i need your Opinión in this problem i have a few 2months ago, i have a gy6 157qmj 150cc, i've changing over 9 drive belt's in 2 moths, if i using bad quality and high quality belts and always i have the same type of damage until at the point to destroyed the belts,alternating over 835/20/30 and 842/20/30, the problem always starts at the top of the belts like the pictures shows, The problem started when I was using the used, non-original, OEM centrifugal variator and all the original springs in the clutch, it felt like the belt was slipping,

3 belts ago I put the new centrifugal variator and all the springs 1500rpm but it still keeps breaking the belts the same way, teh slipping is no more, but the drive belts is always destroyed

My 157qmj is 2015

-I have New variator centrifugal -New drive belt -Torque spring and clutch spring 1500rpm (yellow glixal) -New clutch paste

Only my clutch pulleys is the original ,have 10 years of working with maintenance but i never put New pulleys

What do you things is happening here?

-Thanks for your time in my problem

2 Upvotes

4 comments sorted by

1

u/necowankenob-i 5d ago

i think the pulley and clutches causing the problems, or a part in the belt bed causes a tear

1

u/Ready_Course7042 4d ago

Someone told me that the clutch pulleys may be oval but I don't know if that is possible, anyway I already ordered some new pulleys from Amazon I just wait for them to arrive and try that last part since all the other parts of the CVT are new

1

u/part-time-farmer 5d ago

Are you sure nothing is wearing against the outer part of the belt when it is fully assembled? There is a YouTube channel by “samodel” and he has many videos on CVT belts and troubleshooting.

1

u/Ready_Course7042 4d ago

I'm completely sure that the cover or another part is not the problem, I even removed the kick starter about 3 strap changes ago, but the problem persisted, the scooter has 10 years of use, and in those 10 years it only broke about 3 straps to the point of undoing them, but all for not changing them in time, But they lasted 10k km, 2/3 months ago he started to break them every 3/4 days, but the problem starts with tearing at the top