Washer between pipe and cylinder?

[yamayz125]

Heard one said that if you put a washer between the cylinder and the pipe,
the effect will be like an aftermarket pipe.
I don`t know how thick he meant the washer should be, maybe 5mm.
Then the pipe will come more away from the cylinder.
What do you think about this? True?

 

[adam728]

Spacing the pipe away from the cylinder effectivly lengthens the head pipe. This in turn "lowers" where the powerband is. 5-10mm is usually all you would go. This would lower were the power sits anywhere from maybe 150-400 rpm. That means a little more lowend, midrange hit comes in a bit sooner, and it signs off on top earlier.

Picture a dyno run of a bike. Now slide the curve a few hundred rpm closer to the Y-axis. That's a very basic idea of what a spacer would do.

And don't throw any old washer in there. The opening in the center must match the pipe's opening. It's more of a spacer ring than a washer. Seems pretty common sence, but I remember a kid wanting to put a fender washer in for a spacer (large outer diameter, tiny little hole in the middle).

 

[2-Strokes 4-ever]

I use to be a 125 woods guy. Do make sure you use the factory washers.......I usually added 3 or4. Will help the narrow banded 125's power to come on sooner. Coat o-rings on pipe with heat-proof silicone and enjoy better low end.

 

[flyinzuki]

If you must have aftermarket...

mxbonz spacers