Longitudinal

I have one and like it a lot, but it needs to be a lot faster. Later, I want to do a large four stroke swap, but for now, I will settle for a little more juice.

I have been unable to find any aftermarket exhaust for the NH125, so I am considering making my own. How important is an expansion chamber for a bump in two stroke performance? I should experience some improvement from a properly sized straight-through exhaust, yes?

fitfreak3

Read these:

Expansion chamber: http://hondaspree.net/phpBB3/viewtopic.php?f=8&t=1012

2 stroke articles: http://hondaspree.net/phpBB3/viewtopic.php?f=8&t=3464

Follow the links

Longitudinal

Thanks. Reading through the articles now. Have seen the calculator before, but still would like to know what potential advantage (how much more power) an expansion chamber offers over a properly sized straight-through muffler. I am not so much afraid of building the chamber, but more of getting it wrong or not having all of the information about the ports on my 125 to build it right.