I have a 1983 NC50 Honda Express. I have a problem with it that cropped up two days ago, and has steadily been getting worse. At first only in the extreme high end, but now at about 20mph (by my crappy speedo), it will kind of suddenly bog. The pitch of the engine will drop, and it won't accelerate. At first it would pop right back again, but now I'm lucky if I can get it up there in the first place.
At first I thought I was outrunning my fuel supply somehow, like the fuel system was dirty or something, but now I think maybe it's a transmission problem? It's a two speed with an automatic transmission. Any help would be greatly appreciated. Also, does anybody know a shop or even just someone who knows more than me in San Diego?