This thread is a how-to do a full de-restriction on the new kymco 50cc 2t scooters. The scooter in the pictures is the Like 50 2t but all of the others are virtually identical. The first thing before any of this is make sure that the De-restricted variator boss is installed in your scoot' or else none of this will make any difference.
#1. Remove exhaust system and carburetor from scooter.
#2. Remove the air filter/silencer that feeds air to the catalyzer
This device feeds fresh air to the inside of the pipe for emissions reasons. Follow the large tube connected to the muffler and pull all of it out. Some bikes it's hard to reach the end so if your feeling lazy just cut the hose.
#3. Using a hack saw or large cut-off wheel cut away all of the extra "tubes" on the muffler.
#4. If you have a welder, awesome if not take the pipe with the extras cut off and have a local welder plug the holes up with something that will last. Getting creative on this on.
Once welded make sure to paint with high-temp paint so the welds and bare spots where you cut don't rust.
*side note: do not buy a Harbor Freight welder if you care about them being pretty.
That's it for the exhaust now on to some simple tricks to make the scoot' run better rain or shine.
Thanks to the EPA the guys over-seas seem to just gave up on setting the carbs before covering up the mixture screw. This one was set to a whopping ZERO TURNS OUT from the factory, and I've seen the all the way to 5 turns out!!!
Use a small drill bit to pop the cap off, or a very small flat head to pry it off.
Move the oil injection tube 90* out of the way (Be sure to use loc-tite or glue to secure it in place, tap lightly to seat it).
Either purchase the D carb adjusting tool or even better use your Dremel to cut a flathead into the blank mixture screw. If your worried about making little marks in the body of the carb, you can slowly back the mixture screw out with a small screwdriver then cut the slit in it on the bench. Settings will vary from 3/4 to 1 turn out.
A good little secret for the Like 50 owners
With the exhaust flowing more effectively I've found that a slight up-jet is required at least at my elevation (100-500ft). A #85-#86 jet works perfectly. If you own a Like 50 and remove the insert in the airbox a #90 main jet is best.
Put everything back together, use a new exhaust gasket if necessary and double check everything gets hooked up correctly.
The best way to test if the welds are good; start the engine but don't let it get very hot, let it idle and plug the end with your finger or a rag and if it kills the engine and you don't hear any "hissing" all is well. Also you will notice that when you let your finger off there is a noticeable "whooosh", this means the muffler is holding pressure and will work well. I cannot stress enough how much power a simple exhaust leak will rob. If the welds don't seal all you will end up doing is robbing performance!! Idle the bike, warm it up, adjust the carb for best idle then go test ride. Performance on an all stock new bike that is not broken in is a sold 40-43mph on the gauge. Compare this to before the scooter would struggle to pass 35mph on flats. I also think that it cleans the look up a bit, getting rid of random looking pipes hanging down and the like. Hopefully this helps you guys.
