Hey, I just purchased a 1978 Honda Express and I am having a hard time getting up hills without losing a ton of power/speed. I also recently had it shut down on me(seemed like it fouled out) after riding it a couple miles...? Either way, I just purchased a 70cc DR Kit from treatland.tv and cant wait to get it this week! I know I'll have to cut a fin to make it fit which is no biggie, but I have a few questions... 1st, I was planning on taking the carb off and cleaning the hell outta it b4 I put the DR Kit on, but will I need to do anything else to the carb for the new 70cc Kit? I've heard I'll need to Jet it or something, but I'm not familiar with this process. I've heard that you can't buy different jet screws for the NC50 carb...? 2nd, Should I purchase a new head or will the stock one work fine as is, or would I need certain gaskets if I use the stock head? 3rd, my 78 Express has been altered so that the oil pump system is plugged off and the oil section of my tank has been formed to be part of the gas tank which I like, but my question is, what is the gas/oil ratio for this new DR Kit that I'm putting on? Will it be different because of the size or the newness of the engine...? Please hlep! Can't wait to get this beast back on the road!!! Thanks!