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Discussion Starter #1
Hello Guys.

Im in the middle of buying parts for an engine Im putting together myself.
Being new to this platform, can anybody tell me which ball bearing I need for my engine case.

Its a standard 50/70cc case made in taiwan.
Here is a link to a picture ( I had problems uploading one for some weird reason )
50/70cc engine case

Cheers!
 

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Without any OD dimensions of the trans set shaft ends it's impossible to tell you what bearings you need.
 

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Discussion Starter #4
I just thought it was a standard bearings set, as most of these china engines is exactly the same.
But here is the picture of the gears with measurements :D
 

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The 17mm ends of both gear sets will use a #6203 (17 x 40 x 12)ball bearing, and the opposite ends of the shafts will need a 13.5 x 20 x 12 needle bearing and a 14 x 20 x 12 needle bearing, shown HERE.

Just an FYI, the above gear sets will not work with the cases you linked above, those cases utilize ball bearings in place of the needle bearings.
 
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