Re: very new to this motorbike thing with a few questions
Everyone seems to be out of the N2 carb with the red air-filter but boygofast on eBay has some of the ones with the black square filter that people call the "speed" carburetor. This is the one I have on my bike and I can't tell if there are any differences, they appear to be identical.
Disclaimer: Lots of people have had trouble with boygofast and though I'm not one of those people, I feel I should bring it up. I just ordered another engine and speed carb from him, I'll let you know if everything gets here properly if you want to wait.