A warning to those looking to mod their motorized bicycles:

Most, if not all, of the hacks and mods featured on this site were made by individual hobbyists. If you are new to working with 2-stroke bicycle engines, please by aware that there's a possibility that a mod featured on this site could seriously damage your engine. Please don't try any mod from this or any other site unless you fully understand what you are doing. The owner of this blog will not be held responsible for both material and bodily damage caused by performing a modification featured on this blog. Also remember that opening up your engine may void your warranty!

Thursday, August 18, 2011


If you have the equipment for welding, then this mod is for you.  Having dual tailpipes will help give you more power similarly to an expansion chamber, and it should spread out the airflow.  Not quite as good as an expansion chamber, but the next best thing.  Still, I wonder if the time and money that goes into this couldn't have just been spent on a BGF or SBP expansion chamber?

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