Ok, I just got my Ninja G3 in and took my engine apart for the first time only to find out that the exhaust threads are stripped like none other (although, oddly enough my stock exhaust did tighten up decently). I was going to do some porting, but I dont think I want to mess with it now as I dont want to f-up the threads on the Ninja. So...my options are as follows...the Airsal 70cc Kit or the Parmakit 50cc, the price difference is like $30. I have heard some iffy things on the Airsal, but Parmakit seems like a pretty legit manufacturer.
So...what do you guys think? BTW...this is for an AV7