Ceramic bearings?

[Will'smotobikes19]

I work with ceramic. It's some pretty hard stuff. Harder than steel practically. In fact if you push steel across it it will leave a gray streak where the metal rubs off does chip though so if any decent size piece of metal got in the bearing it could wreck it. Pretty heat resistant though. NACHI 6202's are pretty good quality made in Japan. I got 4 of them for like $26. They aren't ceramic though.

 

[Will'smotobikes19]

L.A.Sleeve los angeles cal. sleeves motorized bike cyl up to 52mm 250-up$ mzmiami has iron slv. 48mm cyl& piston

I have the 48mm jug haven't been able to run it though because the piston sticks up like 5 or 6 mm above the cylinder with a 40mm stroke. I made a spacer but need to get it milled 3 mm or something. Don't know why the piston is so tall.

 

[RJ79]

L.A.Sleeve los angeles cal. sleeves motorized bike cyl up to 52mm 250-up$ mzmiami has iron slv. 48mm cyl& piston

74cc Gilardoni puch 47mm treatland

 

[Motorad]

MXS

 

[Motorad]

re work a ktm 65 crank,and run a mxs cylinder,28mm keihin,ktm 85 pipe