Hi, First of all I need to remark how good is this forum. I'm Tony from Ponce, in the south coast of PR. This is my build. La Jolla Aluminum Cruiser. 66cc engine with BGF VooDoo expansion pipe. There you can notice the insulation I put on the header to avoid burning my leg. Although it's on break in yet, it moves pretty good. Using Klotz syntethic oil with 91 octane fuel at 24:1 for now. Then I'll move to 32:1. Here is the detail of the pipe: Hope everyone likes it. Feedback is very welcome!!