MOPED ARMY

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I figured I'd loose some mpg. I can deal with 80mpg instead of 100.

http://www.treatland.tv/puch-moped-70cc-cylinder-treat-kit-for-the-people-p/puch-treat-kit-70cc-head-party.htm

This one is very cheap but would I have to port anything for that? Is Polini a really good name brand?

50 or 55 is pretty fast. A polini 65cc cylinder will get you there, but probably not with the stock exhaust and carburetor. When you put on a kit, it is important to match the engine case to the kit you're putting on. Oh, and you NEED to jet your carburetor appropriately.

So Graham, are you saying I need to do some minor upgrades first? I really am new to this so I don't know the best way to make my Maxi faster. What kind of upgrades should I make?

I agree that there are better things for you to start with besides a kit. If you read through this article you'll see a lot of your options for making your moped faster. They're more or less in order of easier/less expensive to harder/more expensive, but obviously the order you do stuff is up to personal preference.

When you kit your moped, you're going to want to have a performance pipe on it anyway. Since the pipe is easy to add, that's a good place to start. You could also do the high flow air filter to help get the most out of your pipe, and DON'T FORGET TO UPJET. Adding the pipe first will help you learn how to tune your bike, which is a skill you'll need to have down before you add a kit.

Then, if you've got the cash, you could upgrade your carb to a 14 or 15mm Bing or Dellorto. This would also be good practice fixing and tuning stuff, and you'd probably get a little more speed out of it. Depending on your gearing, you should be pretty close to 40 by the time you add the pipe, bigger carb, and air filter. (Although there are people who do 40 on less, or who aren't anywhere near 40 with that stuff).

After all that, then I'd say you should kit it if you still want to go faster.

I went from a consistent 140 mpg to 95 mpg just by de-restricting the intake, tecno circuit pipe & upjetting on my Puch. That's without a kit or porting the stock cylinder. It runs about 38 mph. Paz has a 70 mph hot rod that only gets 40 mpg. The faster you go the fuel economy drops dramatically. There's a bunch of info on this site, but you have to do a lot of searching to find it. Besides that, you need a bunch of tools & the hand skills to go with. It's not impossible, but start slow & work up to it. If you plan on going fast, then just forget about economy. I know, bad news.

proma GP pipe, make sure your carb and intake are 14mm, and remove the headgaskets, you'll be at about 35-38 and very happy with the performance.

if your bike isnt already doing 30 or so it is somehow broken or restricted, thats always the first thing to check.

adding a kit is the equivalent of boring out, camming, and putting new heads on a 4 stroke.. inotherwords, its a huge change to how the engine works and if you dont already understand the engine inside and out, you're gonna fuck it up.