Hi all, any piston engine is merely an air pump. Efficiently bringing in the right amount of air, and then discharging it is primary.

"Port Matching" is easy and cheap with a simple tool like a Dremel.

Cutting on the factory mufflers will only make the engine noisier, has been my experiance. Sadly, the extra noise makes most people think that power and speed has increased, when in most cases only the noise has.

The Poo-Poo pipe MAY improve performance, if not, it certainly sounds better to me (I've got a couple left).

The big carborator CAN improve idle, midrange, and top end a bit, and even if the bike is not faster, you can do a much better job tuning. (in stock also).

A colder plug almost always helps 2-strokes.

Tuned exhaust works, but typically is set for Low, Mid, or upper, at the expense of the rest of the Power Band.

Low to Mid is more important to the function of these bikes, since most have no shifting abilities.



Mike

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