You got a pont there. They'll charge you for every little thing.
If I opt to go on my own I want to make sure I can do the mods mtyself. I've worked on my own cars but mopeds are new to me.
I tried looking for manuals that helps explain modification how to's, but no such luck.
Are there any websites that show how to do simple mods on mopeds?
Thanks.
You're in the same boat I was in 2 years ago
Any websites? They're everywhere, including this one
. Youtube has all kinds of videos on working on scoots.
Most of all you just have to dig in and start learning. The more you understand how everything works the easier it will be. Read, read, read. I never knew I would have to read so much to work on my scoot. And sometimes you have to dig through a bunch of pointless threads. If you do have questions just ask.
First off, you have a SYM DD50 which I read has the same engine as the Kymco ZX and the Honda Dio right? I have a ZX myself.
What year is it? How many miles? Do you know exactly what the dealer did to it?
Since your getting 40mph we can assume the drive boss has been changed out. If not that should be done before anything else.
Next, you need to disable the rev limiter on the CDI. Very simple to do. I can find instructions if you need them. You won't gain much from doing this, but it's better to go ahead and get it out of the way.
As for real mods, go for a Tecnigas exhaust. They're awesome. You can use one that is meant for the ZX. It'll work I've read. You have to increase the size of the main jet with the pipe. You'll ruin the engine if you don't. Read up on doing "plug chops". It is a method of checking the air/fuel ratio by making a runs at WOT/half throttle/idle with new plugs then checking the color on the insulator. Google it, look it up on youtube, there is much more to it than my brief description. Some people drill the jets out. It does work but IMO for a novice, just order some jets.
You also want to tune the CVT in order to get the best performance with the new pipe. Again google and youtube scooter CVT. You'll want to get a stiffer contra spring. They say a 1500 rpm spring is best to start with. Sometimes they can be measured in %. They are usually 3 or 4 steps of stiffness above stock. You want one somewhere in the middle. Then you match the variator rollers to the contra spring. The rollers come in different weights and are measured in grams with .5 gram increments. Stock rollers are usually around 7 or 8 grams. Lighter rollers = more rpms. Too light and the rpms will rise out of the power band before you reach top speed. If you get it all right, you should get at least 45 if not 50 top speed and a huge increase in acceleration.
This is probably a lot to take in right now but just do your homework and learn about it before you go and frustrate yourself. Good luck! Let us know if you have questions
Oh... And welcome to the forum
