Gareth,
Sorry I missed this earlier. Nice build, simple, clean and obviously gets ridden. Thanks for sharing with us. And you're gonna love that smaller sprocket. Ride careful, have fun. Oh, where in FLA. are you? I'm an old Maimian.
Tom
I'm in Holiday. It's a little north of Clearwater. Or as I say to people out of state..half way down on the right. =-) I don't know when I am going to try the small sproket. I am having way too much fun with the 50 tooth. It beats the **** out of my heavy Del Mar with the stock 44. =-) I talked with woolf aircraft yesterday and my 1.5" IR U bend should be here by the beginning of next week at the latest, so I can get the expansion chamber mounted.
The ever popular PK 67cc engine. Mine is from Zoom. =-) I like tuning in stages, that way you have few variables when optimizing. This build is far from finished. =-)