technigas next on standard 50cc puch maxi

[henry]

i want to buy a technigas next, will it make a change on my standard puch? the only thing i changed is a powerfilter right now. also what jet do i need to install and also do i need any other adjustments to fix it?
i might want to buy a yasuni silencer, will this change the performance and the sound by a lot? and which one is better: the aluminum grey one or the kevlar/carbon one. also fitting the silencer on the technigas next exhaust do i need any adjustments or will it fit right away?

thanks many times

henry