Hello everyone. I'm starting this thread to once and for all end the needless forum searching for the proper bearing codes that belong to the 66cc GT-5 two stroke engine (and later all the other Chinese engines). This includes ALL bearings inside the engine. I believe there are 6 but if IM wrong please tell me. Upper needle bearing Lower needle bearing Crank shaft bearings x2 matching Clutch shaft bearing x2 matching What I need is ether 1) the complete dimension of all bearings (or any bearings you may know of)or 2) a researchable replacement bearing ID number. This is it! No more taking bearings to auto stores trying to match by size. No more buying replacement bearings form the same dealers that sold you the engine with the Chinese bearings in the first place. No more "eyeballing". No more "just making it work with my old bearings" type BS. And no more buying bearings that aren't specified to the job it has to do inside the engine. No more forum searching in 7 different places to try to find all the ID numbers. AND NO MORE NEED TO ASK THE QUESTION "what are the proper replacement bearings for my engine" AND GETTING ONLY 3 UNSATISFACTORY RESPONSES. This is it its all going to be in one place now. Now what is going to happen? I'm going to use the information you guys provide me to do a host of beneficial things. 1) I'm going to make a extensive list listing all the bearings that could posibably work for every bearing application in the engine 2) I'm going to list bearing sets that will be geared to different attributes you may desire. (speed, noise, longevity, price, material,my recommended set up Ext.) 3) I'm going to list the company that make all the bearings for this engine so you have selection instead of using just SKF 4) I'm going to list the sights were you can buy these bearings (don't worry I'm not a vender and i will not be pushing any particular sight I'm just trying to make obtain these bearings easier for you.) So help me do this guys any bearing specs you may have would be great! Ill find out all the sizes one way or anther but if you know and told me that would be a great help Thanks!