KCvale
In memory of KCvale 1959 - 2019
I like to refer to them as a Reverse Super Charger, but the same meaning ;-}agreed agreed, if you want PERFORMANCE from a two stroke, you get a well designed tuned pipe/expansion chamber. its simply a supercharger for 2 strokes.
Yep. and maybe a short muffler on the end of that.if you only want to reduce noise, you stick on the stock standard exhaust as equipped.
Yep, you need to adjust the carb to let more fuel go right through and out the exhaust pipe.if you couldnt care less and just want to get home, or around for a few days until parts arrive... remember that virtually no 2 stroke outboard engine runs a muffler...AT ALL! they actually run with negative back pressure, as the propwash is "sucking" on the standard exhaust outlet, ie, the middle of the prop.
no engine will be damaged by running with no exhaust system (look at the old aircraft...they had little 6 inch pipes only to clear the fuselage) AS LONG AS you tune the carb to suit. they just may not produce all the power they can....
It the case of outboard motors, they just dump that unburnt gas/oil mix right into the water.
Back in your time reference days gas had Lead in it too, yummy in the water supply, think Flint.
Of course you can get the best of both worlds...
An expansion chamber 'reverse super charger' AND an excellent muffler on the back end like this.
A tuned X pipe with an auto Glass Pack welded on the end.
Man I miss that bike, it was one of my first 1/2 dozen builds and my personal ride for more than year.
Fast (3-speed 66cc shifter), Quite (X-pipe with muffler) and Comfortable, (Front and Seat Post shocks).
Sorry, I digress, just a fond memory moment, I built that in 2010.
I am on the 4-stroke band wagon these days, they have valves so inherently more efficient and quieter to begin with, and much easier to quite down on the exhaust side without a performance loss on these small engines, which quite frankly, isn't much to start with so you take advantage of everything they have and that you can enhance to fit your need.
On a 2-stroke, X-pipes rule, watch any motocross event, not a SINGE BIKE runs a straight pipe.