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Old Dec 14, 2016 | 07:46 AM
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Default Evo compatibility

Hello everyone-i was redirected here to ask my question-i have a 92 ultra classic that needs a rebuild-i found a 94 dyna motor ready to go. I know there are differences in the motors and primaries themselves but as far as mounting and running the 94 is it a direct bolt in? Would it be so for any evo 84-99?
Thank you.
 
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Old Dec 14, 2016 | 10:40 AM
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Main evo differences were in the heads/breather portion of the engine. They changed to top breathers in the 92-93 years with some 92's having bottom breather heads. Everything else is the same.

Griz
 
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Old Dec 14, 2016 | 10:45 AM
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Originally Posted by Bdffry30
Hello everyone-i was redirected here to ask my question-i have a 92 ultra classic that needs a rebuild-i found a 94 dyna motor ready to go. I know there are differences in the motors and primaries themselves but as far as mounting and running the 94 is it a direct bolt in? Would it be so for any evo 84-99?
Thank you.
As Griz said the '92 is a bottom breather and the '94 is a head breather.
Does the '94 come with carb and breather set up?
If yes then you're good but if not you're gonna have to ge them for a head breathing engine.

Short answer is that it is a bolt in.
 
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Old Dec 14, 2016 | 01:57 PM
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It does have the breather bolts on the head but no carb-can those breathers get capped with filters like a valve cover on a car or does it have to be recirculated?
Thanks for the replies everyone 👍
 
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Old Dec 14, 2016 | 02:27 PM
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Originally Posted by Bdffry30
It does have the breather bolts on the head but no carb-can those breathers get capped with filters like a valve cover on a car or does it have to be recirculated?
Thanks for the replies everyone 👍
You can put a filter on it, route it to the carb, or just vent it to the air.
Whatever you want to do.
 
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Old Dec 15, 2016 | 06:05 AM
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For roughly $40 you can get a vent to atmosphere kit. It's the only way to go.... You don't want to put that **** back into the motor, Do You?
 
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Old Dec 15, 2016 | 02:00 PM
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I would prefer not to..
Thanks for the help!
 
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Old Dec 15, 2016 | 04:06 PM
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Originally Posted by Bdffry30
I would prefer not to..
Thanks for the help!
Then just run a hose from your breather out to your swing arm to keep the oil vapor from getting under your tire.
 
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