Bad Gasket problem
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Cruiser
Joined: Oct 2009
Posts: 110
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From: nyc
Bad Gasket problem
I came across a 1992 fxlr. beautiful looker only 4k origional miles. the problem is the gaskets between the top end and the bottom seem to be leaking slightly. my guess is the bike has been sitting so much the ethanol has broken them down or they just dried out and broke down. My question is will all the gaskets be in the same condition and does this situation predispose the motor to and other conditions.
Seasoned HDF Member
Joined: May 2008
Posts: 21,143
Likes: 12,707
From: South Carolina
Those are the base gaskets, a common issue with Evo engines. Pull the cylinders and replace the gaskets, better yet, have the cylinder bases trued by a machinist.
It has nothing to do with ethanol...
It has nothing to do with ethanol...
Seasoned HDF Member
Joined: Jan 2011
Posts: 157,463
Likes: 57,022
From: Michigan 15 Minutes East Of Hell
Aftermarket gaskets are a better choice when replacing base gaskets ... EVO base gaskets will live much longer if you give the scooter a chance to build a "bit" of heat before you take off.
Road Warrior
Joined: Mar 2011
Posts: 1,378
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From: Macon, GA USA
One way to help keeping this from happening is make sure your motor is up to full temperature before pounding on it. On EVOs and even twin cams they are not oil tight till everything expands. On twin cams the fairly much fixed the problem but macing the crank case and using a o-ring instead of a gasket. But you still need to let a twin cam get to running temperature before pounding on it. I have done MANY EVO base gaskets and till the customer not to pound on it until it reaches running temp and they would leave my shop or house pounding on it and all I would see was more $ signs. LOL What I found works best on EVOs is copper base gasket with spray copper coat on them or tear it all the way down and have the case machined for o-rings.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
There is no easy way to answer that question! If you don't have one get a factory service manual, which explains at length how to do the job. You could alternatively ask your local indies what they would charge to do the job. It should only involve a gasket kit and labour.
Your bike is an early Evo, which suffered that cylinder base gasket problem, however later gaskets are fine and once rebuilt the bike should be trouble-free. You may find your indies have favourite brand after-market gaskets, which are also good.
Your bike is an early Evo, which suffered that cylinder base gasket problem, however later gaskets are fine and once rebuilt the bike should be trouble-free. You may find your indies have favourite brand after-market gaskets, which are also good.
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Lawdawg
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Mar 3, 2013 08:32 AM
