I have a 1979 Yamaha Moped. It runs alright, except i noticed that the top speed has dropped since last year. I don't think the carberator needs to be cleaned, but i was going to put some gas treatment in it, but i was wondering if you have to use special motorcyle or moped treatment, or can you just use a cars gas treatment? The piston and rings are all fine, and the air filter i just cleaned. Can you help me improve the top speed? Without modifiying the engine. Thanks
If you've done the obvious maintenance (i.e. cleaned your air filter, checked your tire pressure), you're going to have to fiddle with the engine to improve your performance.
<b>Definitely</b> clean the carburetor if you haven't already. This is a task that comes with owning a moped. Carburetors need to be cleaned regularly --gas additives won't clean a clogged carb.
I <b>do</b> put a small amount of liquid (Wynn's) carb cleaner in every tank of gas to help offset the carb becoming dirty, however.
Chris.
Hi! Also,you may have to de-carbonize the exhaust.Carbon at the intake and especially exhaust ports and muffler robs you of power.Make sure something simple like a brake isn't sticking or dragging,because it's often overlooked.That happened to me on a long trip a week or so ago and I was glad I had my tools with me on the road.A little 50cc engine won't stand up to a little brake shoe drag without loss of speed.BYE!
Improve the top speed without modifying the engine/drivetrain?
Let me know if you ever figure out how to do that one.
Riding with a tailwind or downhill or off a cliff are the only ways I know to do that.
Off a cliff will get the highest speeds possible... gar on teed.
Oh... and... clean your carb.
If you can keep the riders weight down to about 40lbs..........
Good point,Rob! I've only got to lose a couple hundred or so!
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