Question about 2000 Harley Davidson FXDWG Dyna Wide Glide

1 Answer

Primary seal leaks

I have the same problem on a 2000 Fatboy. The Mainshaft inner bearing race is walking in on the shaft toward the clutch and coming out of the seal. Then it leaks. I pulled off the race and am trying to find out if a new race will fix it or if the shaft is the problem.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,623 Answers

Hello's another HD design flaw, you can replace it, but the end result will be the same. Consider yourself lucky you were able to remove it. I have had to cut them out before due to lack of room to get puller in place.
S & S makes a Hi-Perf. aftermarket replacement that will eliminate this "walk" ...and i think Baker does also. You might want to consider these options. I never cared much for oil leaks.
S&S High Performance Inner Primary Mainshaft Bearing Race Manufacturer Part #: 565089
Good luck...i hope this helps fixya.
"a bad day of riding beats a good day at work"

Posted on Jul 24, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Harley davidson whining coming from primary area

What year is the bike. Is the primary chain adjusted properly? Is there an adequate amount of oil in the primary? Check that the clutch to mainshaft nut is not loose. If none of those you could have a defective clutch hub bearing. You could also have a defective transmission input/mainshaft bearing or a main output shaft/drive sprocket bearing. Listen with a stethoscope to try to narrow down where the sound is coming from.

Sep 01, 2014 | Harley Davidson FLHTCUI Electra Glide...

1 Answer

Removal of an 06 ultra classic trans

This removal requires some special tools and a manual. First remove the negative battery cable.Drain and remove primary cover. Remove the shift shaft from the housing.Remove the primary drive. The clutch nut has left-hand threads so righty loosey. Remove the small screw on the end of the starter gear shaft. Remove the screws holding the inner primary housing. Now on the right side. Remove the exhaust. Remove the two screws holding the starter motor to the trans housing. Inner primary will now come off. There is a race that is pressed onto the mainshaft that requires a special puller to remove. Drain trans fluid. Remove trans side cover, the one with the clutch cable. Remove the trans top cover. Remove the shifter drum. Remove the shift fork shaft through the right side of the trans bearing door. Remove the shift forks through the top off the trans housing noting location. Remove the screws that hold the bearing door to the case. There are a couple of pry points that you would use to separate the door from the case. Should come on out after all that.

May 15, 2012 | 2006 Harley Davidson FLHTCUI Ultra Classic...

2 Answers

I have leak from what seems to be from behind the primary case.

sometimes the mainshaft leaks.. ****** ..or I have seen where shifter exits the ****** behind the primary that seal leaks ,, look under & from above ..anyway youll pull the fix good luck..check out our info at

Aug 16, 2011 | 2000 Harley Davidson FLSTC Heritage...

1 Answer

Noise in the primary case might be rear primary drive bearing. What are symtoms of bad bearing?

Well, they usually make a lot of noise before they lock up or come apart. If it's the bearing in the primary that the mainshaft comes through, with the bike running and in gear, hold the clutch in and the noise should go away. This is because the mainshaft is not turning and therefore the bearing is not turning. They don't make a noise when they don't turn. If the noise is still there, it could be the large bearing between the inner and outer clutch hubs. In this case, when you let out on the clutch, the noise should stop because the clutch locks up and the bearing doesn't turn. If neither of these apply, your noise may be somewhere else. Still if I suspected these bearings, I'd go into the primary and check them out. If it is a bad bearing, you can feel the roughness in it when you turn it with you hands.

Good Luck

Jun 20, 2011 | Harley Davidson FXDWG Dyna Wide Glide...

1 Answer

Thanks wd4ity, your instructions helped. I checked everything. But after changing 4 seals of different makes, its still leaking after a quick run round the block. The leak is not as bad but get a small...

Ok, usually when I give information on things like that, I tell them everything that I know so that they get their problem fixed the first time. I don't allot it out piece at a time. So, undoubtedly, there is something amiss here, not just the normal leaky seal.

If you are positive that the leak in coming from the backside of the inner primary at the mainshaft. There is a starter seal up just a bit higher that can leak as well. You should have already checked the inner bearing race position on the mainshaft, 0.100" from the face of the final drive gear and that the race is between 0.9950" and 1.000" (25.27-25.40mm) long. The race is free of burrs and deep scratches. The new seal should have a tension of about 0.5mm (0.020") between the seal and the bearing race. If you measure the inside of the seal with a caliper and then measure the outside of the race, the race should be a bit larger than the seal.

When you installed the seal, did you inspect the recess where the seal goes in to make sure there are no cracks? Did you use the sealer on the outer edge of the seal ( I like non-hardening Permatex) and lubricate the seal where the bearing race runs with Lubriplate or oil. When you install the seal, make sure the lip of the seal where the bearing race runs is pointed INWARDS towards the clutch, not the trransmission. The "Lip" of the seal always faces against the direction of oil flow and is seated about 0.050" below the surface of the backside of the primary. The seal must be straight as well. If you get it in crooked in won't seal. If you can't get an OEM seal, try to order a James Gaskets seal.

Double sealing does no good as no oil gets to the outer seal and it burns up very quickly even if you pack grease between the seals. This used to be used on the old Shovelhead with the sealed bearing. It does keep dirt away from the seal though.

Now, it still sounds to me like it's your quad seal behind the front drive pulle. The quad seal keeps the transmission lubricant from running underneath the spacer behind the front pulley and then down between the front pulley splines and the final drive gear. When it drips off, it will drip onto the mainshaft and run down the backside of the inner primary.

Next time you have the inner primary off, take the lock plate off the front pulley and check the large nut. If it's loose, this could be your problem. Usually the nut is loose enough to turn it by hand. It has left handed threads in the nut. The front pulley is made of cast iron and is softer than the final drive gear. This is by design so that the relatively simple and cheap to replace front pulley wears instead of the expensive final drive gear. Without taking the final drive belt off, you probably won't feel any movement in the front pulley.

Well, I hope this helps again. For the life of me, that's all I can thnk about. I've even included some information that I never check in most cases, like the length of the inner race.

Good Luck and Ride Safe

Jan 18, 2011 | 2004 Harley Davidson FXSTD - FXSTDI...

1 Answer

I have a 2004 Duece FXSTD. Drops of oil was found on the floor under clutch area of the primary. After some inspection, I found that it was streaming from the inner primary.Got a seal set from Motor...

Did you check your front belt pulley? These pulleys are made of relatively soft cast iron as compared to the final drive gear. This is so that the easily replaced and relatively inexpensive front pulley wears before the difficult to replace and expensive final drive gear wears. The pulley will wear in the splined inner bore and will get loose on the final drive gear. Then transmission oil will run out of the pulley and down the inner primary. This is because of the lose of pressure on the "Quad" ring behind the pulley spacer. This may be your problem.

Another mistake a LOT of people make when replacing any seal is putting the seal up dry. On the inner primary seal, you want to put a bit sealer compound around the outer edge of the seal where it goes into the case. Although there are a lot new sealants out there, I still prefer good Permatex non-hardening. Once you get the seal in and straight, oil the inner seal surfaces and the bearing race. If you put the seal up dry, you start the engine, the mainshaft turns about 1000 rpm. This will burn up the delicate rubber lips on the seal almost instantly because of friction before the oil can get to the seal. You MUST lubricate the seal or it WILL burn up before you can blink an eye.

Also check the position of the inner primary bearing race. It must be 0.100" from the final drive gear. If it's way out of position, the seal may not be riding properly on it.

If you are in doubt about whether the transmission is leaking or the primary, refill the primary with a quart of automatic transmission fluid, the red stuff. It will work long enough for you to determine whether it's the transmission leaking or the primary leaking. If it's the transmission, check the front belt drive pulley for wear, You'll usually find that the large nut that holds it on is loose.

Good Luck

Dec 27, 2010 | 2004 Harley Davidson FXSTD - FXSTDI...

1 Answer

Leaking primary

If the primary is leaking on the backside, you must pull the entire primary drive to gain access to the backside.

Start by draining the primary. Disconnect the battery, remove the outer primary cover, jackshaft for the starter, the engine sprocket nut, remove the circlip and remove the clutch rod adjuster, remove the mainshaft nut to get the clutch off (left-handed threads), primary chain adjuster.

From the right side of the bike, remove the exhaust system to gain access to the starter. Remove the starter.

Go back to the left side and remove the bolts that secure the inner primary to the engine and transmission. Once you have all the bolts out, the primary cover should come off easily. If it doesn't, look for a bolt that you may have missed including on the backside.

Now that you have the inner primary cover off, you can replace the seal on the backside of the cover. Install the seal but before you put the cover back on, you must lubricate the inner lips of the seal where it rides on the mainshaft. Many people don't do this and they destroy the seal in the first five seconds of running. Without lubrication, the mainshaft turns so fast that friction will build up heat and damage the seal within the first few seconds of operation before oil can get to the seal. Lubricate that seal.

Now , Since you've got the inner primary off, there are some seals in the transmission that should be replaced as well. I always replace every seal back there everytime I go into that area. Replace the large final drive gear seal as the thin seal between the mainshaft and the final drive gear. I also replace the Quad Seal behind the spacer behind the belt pulley. This will require the special tools necessary to remove the pulley. If you have those, I'd recommend doing this job as well.

As you can see, this is not a job for the faint of heart. It's a complicated job and a lenthy job. This is why the dealer charges so much to do the job. Now, my experience on doing this job is on the earlier Evo and Shovelhead models but the Twin Cam can't be that much different. I'll help as much as I can via this medium but I must recommend that you purchase a service manual. This medium does have it's limitations.

Good Luck

Aug 05, 2010 | 2001 Harley Davidson FLHRCI Road King...

1 Answer

How to replace inner primary seal

Replacing the inner primary seal is a major job. You must remove all the primary drive components such as the primary chain and the clutch assembly. Then the exhaust system so you can get to the starter to remove it. Then you must remove the inner primary itself from the engne and the transmission. The seal is on the backside of the inner primary. If you replace the seal, remember to lubricate the lips of the seal as well as the mainshaft before you reinstall the inner primary. If you install the seal dry, when you start the engine the mainshaft will burn up the seal in about three seconds before the oil gets to the seal. Put some oil on that seal.

Now, once you're in there, you may find that it isn't your inner primary leaking at all. It could be a transmission seal. One of the worst culprits is the Quad Seal behind the spacer that is behind the front belt pulley. You'll need some special tools to remove the pulley and replace this seal if it's leaking. It looks like a standard O-ring but it isn't. Both the compensator sprocket nut and the front pulley nut require a LOT of torque. The compensator nut takes 150-165 foot pounds and the front pulley nut takes 150 foot pounds. Also, the mainshaft nut that holds the clutch assembly on takes 60-80 foot pounds of torque LEFT-HANDED. You will need a way to lock the front pulley and the primary chain in order to apply these levels of torque to the required fasteners.

This is a complicated job. That's why Harley charges so much to do it. I would suggest that you purchase a service manual as there is far too much involved in this job for me to type it in step by step here.

Good Luck

Aug 05, 2010 | Harley Davidson FXDWG - FXDWGI Dyna Wide...

1 Answer

Oil leaking from the back of primary case

There are several things behind the inner primary case that could be leaking. There is a seal behind the inner primary where the transmission mainshaft goes into the primary. This seal sometimes starts to leak. Also, there are seals in the transmission in that area. The final drive gear seal is the big seal right behind the front final drive belt pulley. Somethimes this pulley wears on the splines of the final drive gear and it loses tension on the "quad seal" on the final drive gearshaft.

You'll nee some special tools to get to this area. You'll need sockets to fit the compensator sprocket nut and the clucth nut. You'll need an airwrench, a primary locking bar, and a torque wrench that will pull 150-165 ft. lbs. torque in forward direction, 68-80 ft. lbs. LEFT-HANDED on the clutch nut, a primary locking bar, a final drive sprocket locking device, a mainshaft nut removal tool, and some seal pullers and installers. Good Luck.

Apr 22, 2010 | 2004 Harley Davidson FLTRI Road Glide

1 Answer

When replacing the quad seal and main shaft seal are there any other seals that go in that general area.. on 1998 softtail 5 speed transmission??

Yes, there is a small seal that goes inbetween the mainshaft and the final drive gear. If I were doing this job, I'd also replace the seal on the backside of the inner primary as well.

To replace the small final drive gear seal, you will need a special tool to remove the inner race of the primary bearing from the main shaft. Of course, I've seen lots of times when this seal was not replaced while in there with no consequences.

Also, check the splines on the inside of the front belt pulley. These are bad about wearing. I have seen therm wear to the point that they strip out and no longer drive the motorcycles. If allowed to wear too much, they'll start a wear on the final drive gear as well. You do not want that to happen as it will require the replacement of the final drive gear to repair this damage. High Dollars. Good Luck

Mar 03, 2010 | 2000 Harley Davidson FXST Softail Standard

Not finding what you are looking for?
2000 Harley Davidson FXDWG Dyna Wide Glide Logo

202 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4521 Answers


Level 3 Expert

4339 Answers


Level 3 Expert

76070 Answers

Are you a Harley Davidson Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides