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Classic bullet casing bearings WRONG ?

Posted: Sat Apr 25, 2020 12:11 pm
by 73a
I have split a 1977 bulletengine casing and found bearing race bearings nearest the crankshaft , numbers 6205 and 6305 .

All my other bullets have had roller bearing nu205 and nu305

Can anyone shed any light on why this bullet may have been different?

Cheers ng

Re: Classic bullet casing bearings WRONG ?

Posted: Sat Apr 25, 2020 12:45 pm
by Exile
It may just be that someone else had it apart at some time and simply added race bearings in lieu of the rollers. One uses what one has...

Re: Classic bullet casing bearings WRONG ?

Posted: Sat Apr 25, 2020 3:52 pm
by Adrian
Roller bearings are more expensive, perhaps someone was trying to save a few bob?

A.

Re: Classic bullet casing bearings WRONG ?

Posted: Sat Apr 25, 2020 11:49 pm
by Daiwiskers
Replace both with roller bearings ball bearings are fine for wheels and small two stroke main bearings, but they won't last long as main bearings with a heavy crankshaft

Take care all Dai