I am also assistung my pal in doing a custom muffler for his Gilera Nexus 500 sport scooter. I bought him his current muffler ( GPR Italy, carbon - look muffler ) December last year, and until now, the perforated...
In order to boost higher, do i need to ch the fuel pump and other stuff or not ?? if yes, wat other stuff do i need to ch. Now boosting at 0.6 . thx alot.