Primary Swap......
Thread Starter
|
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
Likes: 7,622
From: Poolville
Primary Swap......
I have a complete primary off of my 98 Fatboy with trans and starter.... Will It mount to a 77 Superglide without mods, or many mods...? Don't like the speed of the older Style starters and not real fond of the primary oiling system......
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
Dunno about the fit, but you can do away with the primary oiling system on the shovelhead. Replace the oil seal on the main shaft with a double lip or the later kind that keeps oil better separated from the crank case, seal up the feed and suction line and put 2 quarts of oil in the primary. It used to be done that way back in the day. Biggest potential problem is oil seeping past the seal on the main shaft.
Thread Starter
|
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
Likes: 7,622
From: Poolville
Dunno about the fit, but you can do away with the primary oiling system on the shovelhead. Replace the oil seal on the main shaft with a double lip or the later kind that keeps oil better separated from the crank case, seal up the feed and suction line and put 2 quarts of oil in the primary. It used to be done that way back in the day. Biggest potential problem is oil seeping past the seal on the main shaft.
Seasoned HDF Member
Joined: May 2008
Posts: 21,143
Likes: 12,707
From: South Carolina
The transmission case would need to be modified to eliminate interference with the swingarm.
If it were me, I would just eliminate the primary oiling system and live with the four speed transmission/old starter system.
A quick google search will yield several posts detailing how to do this.
If it were me, I would just eliminate the primary oiling system and live with the four speed transmission/old starter system.
A quick google search will yield several posts detailing how to do this.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
If all the seals are good and the newer type, which I believe are double lipped, you should not have oil problems. That is, the engine oil should stay in the engine and the primary oil should stay in the primary, like on an Evo.
As for what oil, well, like on an Evo, use what you want. I use synthetic ATF.
As for what oil, well, like on an Evo, use what you want. I use synthetic ATF.
Thread Starter
|
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
Likes: 7,622
From: Poolville
Not definitely going to do it. Naturally I'd like to do the most feasible.. Don't mind the 4 speed and the starter could always be upgraded... I think it would be the smart approach. Can't wait till spring.... I just wanna ride.....
Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
I see the gears in your head are turning..... you're gonna like cruising around with that four banger.....
Trending Topics
Thread Starter
|
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
Likes: 7,622
From: Poolville
Definitely not gonna change a thing until I've out at least 1k on it...
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: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
Ya know, there's nothing really wrong with the dry primary if you have a good oil filter and check the lifter screen at each (frequent) oil change. Yeah, I converted the one I had, 31 years ago, but if I had another one (NO, NO, NO, I DON'T WANT ANOTHER SHOVELHEAD) I would leave it dry.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
The principle thing with the dry-sump shovel primary is keeping it airtight. If there is an air leak, such as a poor seal on one of the gaskets, then oil will accumulate and the plates can get wet (been there and done that!). I can't see any benefit of wrestling with a later primary. Converting to a wet clutch is a simple alternative, as suggested above. The primary originally used engine oil....