I have a cosmo stinger 2001, same as the Avanti Supersport 2001. I noticed in that last thread about the 65cc kits that Dave1 said the stock exaust is extremely restrictive. So, to dave1 or anyone else who knows about these peds: Is it possible to modify the interior of the exaust pipe to make it less restrictive? Also, how did you get e end cap off of the stock exaust? I tried taking it off after taking out the 3 little screws and it didn't budge... thanks
ps. .. any leads on a better pipe for avantis, coming soon?