This is a video describing some of the more popular GY6 150cc stroker Kits. I feature all of Taida's Crankshaft stroker kits. Taida 8.2mm, 6.6mm 3.5mm and 3mm... I also feature NCY's 2.2 and Hoca's 2.5mm... Just for a bonus, I also added in some no name "Taiwan Made" stroker kits kits in size 3mm, 4mm and 6mm....
In this video I also Illustrate what is required for using the Crankshaft. When you use a stroker kit, there's considerations that must be taken. These considerations are as follow: Cylinder height, Chain links, extended Chain guides, longer studs and using (or not) spacers.
This video is meant as a guide. Every engine has it's own unique characteristics and you are strongly encouraged to take your own measurements to double check your application.
Another thing you will want to do is turn the motor over by hand a few times before you attempt to start it,,.... Make sure nothing is making contact/binding/hitting.
You can always contact me at my web forum. www.dansgaragetalk.com ... It is my web forum for scooter enthusiast.
In addition to myself, we have assembled some of the Worlds best GY6 mechanics. If I can not answer your question, some else can.
Hope to see ya at the forum!