1998 engine into 1987 FXR
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Novice
Joined: Jan 2018
Posts: 21
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From: Conway, sc
1998 engine into 1987 FXR
Please help......I have a 1998 engine from an E Glide classic with the flat flange where the inner primary meets the engine. Recall the earlier EVO and I think ALL softail motors had the spigot with O ring wrapped around it. the same O ring goes in the groove on the 1998 inner primary. The O ring is too small for the groove/step in the 1987 inner primary. My thought is to make an O ring slightly larger and use black high heat black silicone to seal up the O ring.........
Other than belt drive/dry primary, I don't have any fresh ideas, other than take the wheels/rods out of the 1998 and put them in the 1987 cases.......
thoughts?
WildBill
Other than belt drive/dry primary, I don't have any fresh ideas, other than take the wheels/rods out of the 1998 and put them in the 1987 cases.......
thoughts?
WildBill
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,564
Likes: 3,317
From: Cental, MI
Odd... Is this a Twinky Engine??
I am sitting here looking at a '99 Softail EVO with the same o-ring Flange to the Primary that I am accustomed to seeing!!
If for whatever reason, the flange is "missing" they make a Gasket for just that job...
I am sitting here looking at a '99 Softail EVO with the same o-ring Flange to the Primary that I am accustomed to seeing!!
If for whatever reason, the flange is "missing" they make a Gasket for just that job...
Thread Starter
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Novice
Joined: Jan 2018
Posts: 21
Likes: 2
From: Conway, sc
this is a 1998 FLHTCUI engine by the number
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,564
Likes: 3,317
From: Cental, MI
^^ That is alot more area than on an o-ring style that has broken... Gasket fix for me here!!!! I detest Silicone/RTV... Personally would rather have a leak....
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Road Master
Joined: Aug 2007
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From: Grew up in Texas, moved to AZ
I did not know there was a flat inner primary mating surface on the left Evo cases. Was there really a change or was the O-ring lip cracked, and PO had the lip grounded flat? If there was a change in Evo left cases, then what years and which model bikes? The only change I know was that they did away with the steel bearing insert and went to all aluminum cast.
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Joined: Mar 2010
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From: Poolville
All EVO cases had a lip for the o-ring seal.. You can see in the pic at 3 o'clock where it originally broke.. more common than one would think. Especially with a built motor...The rest was ground of.. Your gonna need this.
https://rover.ebay.com/rover/0/0/0?m...2F263195307932
https://rover.ebay.com/rover/0/0/0?m...2F263195307932
