2012 super 8 2t speed dropped from 50 plus mph to 45mph

[Andyca714]

I have 70cc kit and leovince TT exhaust and the top speed was 50 plus mph but then my TT exhaust broke and I replaced it with the tecnigas rs ( it supposed to be better ) and what I have now only 45mph max, does anybody know what happened?what should I do ?

[245luigi]

Did you put a new exhaust gasket on? Make sure you dont have a leak.

[Andyca714]

I have 2 gaskets on , the round one stay inside the head and the flat one that came with the tecnigas rs

[rdartua]

I had to grind out a restriction washer from my Leo Vince exhaust - most of them come restricted - even though they are aftermarket ;-)