HELP: 4 Stroke Upgrades

4

4stroke

New Member
Hello, i need some help with upgrading my 4 stroke bike it is a belt drive and has a quiet muffler.. i want to start upgrading it and make it go FASTER but i need help with what parts and sizes. Please Help thanks.

This Engine Exactlly----> http://www.google.com/imgres?imgurl=http://img.hisupplier.com/var/userImages/2009-11/18/zncmotorbike$160652336(s).jpg&imgrefurl=http://zncmotorbike.en.hisupplier.com/product-353016-4-stroke-bicycle-engine-kit.html&usg=__rFn4mE-Yo0B25buBC2rrT3UTkqw=&h=436&w=500&sz=29&hl=en&start=0&zoom=1&tbnid=rdBbMYisrijRZM:&tbnh=138&tbnw=145&prev=/images%3Fq%3D4%2Bstroke%2Bbicycle%26um%3D1%26hl%3Den%26sa%3DX%26biw%3D1280%26bih%3D709%26tbs%3Disch:1,isz:m0,332&um=1&itbs=1&iact=hc&vpx=1007&vpy=183&dur=463&hovh=187&hovw=214&tx=163&ty=124&ei=su77TJv0FYLUtQPU3aj3DQ&oei=su77TJv0FYLUtQPU3aj3DQ&esq=1&page=1&ndsp=18&ved=1t:429,r:17,s:0&biw=1280&bih=709
 
4stroke said:
Hello, i need some help with upgrading my 4 stroke bike it is a belt drive and has a quiet muffler.. i want to start upgrading it and make it go FASTER but i need help with what parts and sizes. Please Help thanks.

This Engine Exactlly----> http://www.google.com/imgres?imgurl=http://img.hisupplier.com/var/userImages/2009-11/18/zncmotorbike$160652336(s).jpg&imgrefurl=http://zncmotorbike.en.hisupplier.com/product-353016-4-stroke-bicycle-engine-kit.html&usg=__rFn4mE-Yo0B25buBC2rrT3UTkqw=&h=436&w=500&sz=29&hl=en&start=0&zoom=1&tbnid=rdBbMYisrijRZM:&tbnh=138&tbnw=145&prev=/images%3Fq%3D4%2Bstroke%2Bbicycle%26um%3D1%26hl%3Den%26sa%3DX%26biw%3D1280%26bih%3D709%26tbs%3Disch:1,isz:m0,332&um=1&itbs=1&iact=hc&vpx=1007&vpy=183&dur=463&hovh=187&hovw=214&tx=163&ty=124&ei=su77TJv0FYLUtQPU3aj3DQ&oei=su77TJv0FYLUtQPU3aj3DQ&esq=1&page=1&ndsp=18&ved=1t:429,r:17,s:0&biw=1280&bih=709
Click to expand...

Not sure what motor you have but a straight-pipe exhaust and some sort of shift kit can make it go faster, but will also be louder.
 
4stroke said:
Hello, i need some help with upgrading my 4 stroke bike it is a belt drive and has a quiet muffler.. i want to start upgrading it and make it go FASTER but i need help with what parts and sizes. Please Help thanks.
Click to expand...
4 stroke bicycle engine kit ZNC142FA manufacturer from China (Mainland) Zhejiang New century power machinery co, .ltd.
You say it's a belt drive, does it run a chain to the back wheel?
belt gearbox? A Grubee 4G?

Where did you buy it?

How FAST does it go now?
 
i have same kit try
49cc 4-Stroke Carb Bored & Reworked


for 48 dollars at affordablegokarts.com drill couple holes in air filter housing and take cap off muffler i weigh 240 and go 38 mph ps also have 36tooth drive sprocket..wee..wee..wee..wee.
 
Adjust the valves first, that will help. They can be way off from the factory. If they are much over .010 you'll be missing a bit of power. I run mine at .004-.005.

Stock airbox should be next to go lol
 
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