The 6203 bearings are larger all around, and will not work in the 6202 engine. Also if you order the 6202 bearing it has to have the Z, it is a custom size. One of the engines that GruBe was going to sell had a steel sleeve and the larger bearings. It would have been nice to see how long that one would last. Have fun, Dave
PS: One other thing I forgot, there are two bolt patterns for the cylinder, & head I got a 65cc from Dax and none of my other engine top ends will interchange. I know the 48 is small but I thought the 65 would be the same as the 70. If you get a head or a Cyl for the 6mm bolts you can just drill them out to 8mm, or use the 8mm on a 6mm stud, no matter. I did mine.
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Originally Posted by Bikeguy Joe  Wow, that's a lot of differences! What's the difference between the 203 and the 202Z bearings? |