Different state laws mean different power requirements. The easiest way
to increase or restrict a 2-stroke power wise is to change the exhaust
pipe. To tell if you have a slow pipe, look at the shape of the head pipe.
(the part that goes between the cylinder head and the muffler)
notice the top pipe is skinny all the way back, the bottom example gets
larger.
An expansion chamber like the Biturbo pipe has a
very specific megaphone and reverse cone design that create shock waves
in the pipe that act to pressurize the cylinder, and increase power and
efficiency
These are honda pipes shown.
On the newer elite models, it is common to have a restrictor welded inside
the head pipe by the flange that bolts to the head.
Is your muffler plugged? If you
check it on a scale, a brand new spree muffler is 1.72kg, or 3lb 12oz.
A clean, rusty one should be lighter! If it is heavy, you need to
clean out the carbon deposits inside, Scooter Therapy charges 40$
How do you tell if you pipe has a restrictor?
remove it and look inside the pipe that attaches to the head. The
hole should be full size, (as big as the pipe) not have a washer
welded inside.
How
do I clean out a muffler?
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