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!

Saturday, November 26, 2011

Spring-loaded tensioner for $3

This tensioner mod is one of the most elegant I've ever seen!  Simple enough, and I believe this is the only one I've seen that doesn't rely on more than one point on the bike frame.  This is the kind of tensioner that should come with the kits.

Wednesday, November 9, 2011

Flexi-pipe muffler extension

If you want to extend your stock muffler(or any muffler) to behind your bike without too much expense or welding, that looks like one way to do it!  The post doesn't contain any details as to how exactly it was constructed or how leaks are sealed, though.

UPDATE: The original photo was lost so I replaced it with another one that uses flex tube to have an extended muffler.  Hopefully this will at least help to illustrate the idea behind the original hack.  You can learn more about the muffler extension seen in the photo in this thread.

Friday, November 4, 2011

Break-in secrets

This article on the Mototune USA website describes a somewhat controversial method of breaking in a new engine.  The manuals for our engines always tell us to start out with heavy oil(16:1) and break it in easy.  This idea is increasingly becoming mythical as many people seem to have better results breaking in an engine by using less oil and using less oil.  According to the writer, the most important period in the break-in period is the first 20 miles, and if it's not done right, the piston rings may not seal to their full potential.  I'm assuming I understand this correctly.

Read more about breaking in a new engine "properly"!

Make your 2-stroke sound like a Harley

Hondabicycle from motorbicycling.com claims to have an exhaust mod that will make your 2-stroke engine more like a Harley.  I'm pretty skeptical, but it's a fairly inexpensive mod.  It involves creating an muffler end cap with two baffles and exit holes.  The muffler is also packed with fiberglass.  If anything, this will at least quiet down your bike if it's loud.

This mod could probably be achieved more easily in combination with my washer end cap mod.  Since that has been proven to be an easy and superior end-cap, you could drill two holes in the washer and make your own baffle tubes.  Then just JB Weld them in.  Let that JB Weld set for a long time before use!

EDIT: Let's be clear that I have never actually tried this, so I have not verified if this mod does what it claims to do.