1998 engine into 1987 FXR
Thread Starter
|
Novice
Joined: Jan 2018
Posts: 21
Likes: 2
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: 8,590
Likes: 3,362
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
|
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: 8,590
Likes: 3,362
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....
Trending Topics
Road Master
Joined: Aug 2007
Posts: 942
Likes: 323
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.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,101
Likes: 7,629
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
