Modern Vespa

Does anyone have any Idea how and what parts to use to get more speed and torque out of a Vespa S 150?

I just bought it and need to get up to speed.

Any suggestion would be greatly appreciated.

The biggest thing you can do to increase the power on your S 150 is to get a Malossi 190 cc kit for it. It will void your warranty though on a new bike, I'm not sure if you want to do that.

Will I be able to do it myself? How long will it take? what about the exhaust and the belt?

Did you buy it new or used? If it's new, you should be aware that major mechanical mods will void the warranty.

The route to follow depends on how much you are willing to spend and exactly what you are trying to accomplish.

The best starting point if you are simply trying to get more grunt off the line is to go down to 9.3g rollers in the variator (for lower gearing at the start), and maybe a #38 idle jet to improve the throttle response. A performance variator will probably get you a bit more grunt, but at the expense of roller wear and fuel economy.

A Sito+ exhaust will make the engine sound just a bit more assertive, but won't give you any noticeable performance increase with the stock engine.

For top speed, the only thing that will help there without major engine mods is a small or medium windscreen to improve aerodynamics... that'll get you a couple of mph.

If you are willing to spend the money and don't care much about fuel economy, then the next step is usually a 190cc cylinder kit (Malossi is the most common one available). This will increase torque and hp very noticeably, but will not give you too much more top speed unless you install taller gearing in the final reduction unit. Most riders who go this route have them professionally installed, but a self-install is not out of the question if you're reasonably experienced with engine work. High-performance cams are also available, but I don't think I'd go that route for a street bike.

There will be those here who'll tell you you should have bought a bigger scooter. You have my permission to tell them to fuck off. The Vespa 150s are an ideal size for urban/suburban riding.. they could just benefit from a bit more grunt. Besides... modding is fun.

Silver Streak is spang on with that response. I will say that depending on what you're looking for, a windscreen is a surprisingly good addition. I put a faco midsize on my LX 150 and it added around 5-10 MPH (indicated) on the top end. Used to be, I'd be at WOT trying to hold 55 MPH in the flat parts of my commute. Now I'm at 75% throttle and hold it just fine, and can easily hit 65 MPH if I'm not paying attention. Easy mod, won't void the warranty. But if it's torque you want, I've heard good things about the malossi thing. I probably won't do that myself, or at least not until I'm out of warranty.