3C Primary Cover Bearings to replace or not

mcnicol said:
Paul, while it might work, I'd be really circumspect using a blind bearing puller that pushed on the primary case casting. That casting is unbelievably thin in places. Talking about it to Scott Potter reminded me of the time that I banged on the pivot pin for the primary chain tensioner sitting in the case with just the heel of my hand and it actually cracked the case! This was the very early case without the ugly blister on the outside. Now you know why the ugly blister is there!
Having had that experience once, I'd never take a chance. My Harbor Freight Tools slide hammer puller does the job adequately (not brilliant), and didn't cost me a king's ransom. I tried to get a used Motion Pro set several times on meBay, boy those things are high demand! At least one went for more than retail!

Ken
Click to expand...

Hi Ken

I have a couple of the Motion Pro bearing sets, including the blind bearing puller set. They are OK quality, but still in the Taiwanese sort of category. I don't think they would hold up in everyday shop use, but they work fine in my home garage for occassional use.

As is so often the case, with the correct tool any job is do-able, without the correct tool the risk of damage increases dramatically....

and in the wrong hands, even the correct tool for the job, used in a way not intended by the manufacturer, can result in the tool being damaged...... http://www.motionpro.com/motorcycle/partno/08-0269/   I succumbed to the temptation to use the small shaft driver by itself as a handy long chisel punch, buggered the chiseled edge of it completely at first hammer strike, whatever it is made of the chiseled edge just shattered leaving a ragged stump behind..... :o

Paul LeClair
 
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