Pulled O-ring but only does 52 km/h

[mopedguy]

Hi. I have a problem rn. My cylinder had a very bad compression, only 4 so i then changed to another 50cc cylinder. I noticed immediately that it went very slow and had really bad acceleration. To fix this lack of speed I pulled out the wedding ring from the variator and then put everything in place. The only problem is that it goes almost as slow as before.
I just want to mention that before the new cylinder it did 56-58 km/h put now it does 52 km/h. I don't think it is the cdi anymore because it actually does 9000 rpm.


EDIT: Do you anything more I can do to make the moped go faster?

It is a TGB Bullet 50 from 2009
Please help.

/MPG

[harry]

anybody can replace parts. the art of tuning is what you do the parts
before installing.

did you check your squish?
how about head space?
these things if done right will give you extra power.

fyi;;you never get full on power at first just after a rebuild ..the rings have to seat
to get full compression. after 300 miles you will have a better idea of what the
real compression is