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O-ring between motor and primary, FXB ?

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Old Jan 8, 2021 | 01:55 PM
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Default O-ring between motor and primary, FXB ?

I have an 81 FXB Sturgis that is now in pieces in the garage. Due to me not paying attention I ordered the wrong part and now don't have a new o-ring for between the motor and inner primary case.

Since it is an FXB with primary belt, does it need this o-ring ? There is no oil to seal and no need for a vacuum in the primary, so I think I can leave out this o-ring ?
 
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Old Jan 8, 2021 | 02:56 PM
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are you talking about the big o ring that goes around outer edge of the crank case ?.if so its there for a purpose
 
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Old Jan 8, 2021 | 03:34 PM
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From: la la land jerzey
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seen it both ways as a belt inner primary - no oil to leak Y have it - it could iso the front just a bit - we always installed it belt or chain just to be sure
 
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Old Jan 9, 2021 | 01:57 AM
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Ok guys thanks for the info, looks like I need to go to the local indie to get an o-ring. The guy is an *******, once asking me why I bother with a Shovelhead as anyone knows they are crap. Coming there for a $2 o-ring is not going to make me popular.
 
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Old Jan 9, 2021 | 01:32 PM
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if it was me, I would be telling him " You must be swimming in money that you don't need my business, Have a nice day...…….
 
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Old Jan 9, 2021 | 03:27 PM
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From: la la land jerzey
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he is a typical indy you can find almost anyplace and i am sure he has lots and lots of underwear that say fuc% house work - if it were not for those he would be waiting on a stimlous check

the o ring is the early one and flea bay has them if you can wait - and plenty of the guys on the site would mail you one
 
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Old Jan 9, 2021 | 06:00 PM
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Honestly, what’s the purpose of that O-ring in his situation? I say no need for it. Maybe just a bead of silicone so it seats well. It ain’t gonna stop the crankshaft oil from leaking past that seal it if and when that seal blows. I know!

And I say his Indy can suck it. What an A-hole. My Indy is a pretty cool dude and we are grateful for each oother!!
Tom
 
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