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Well, I reached the end of the line with my S40 (Read 326 times)
och
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Well, I reached the end of the line with my S40
10/12/22 at 14:35:30
 
For the last several months I've been battling a major oil leak from the stator cover. It started out pretty minor, but got progressively worse, where it became major. Looks like it is leaking from the stator plug.

At first I tried to fix it myself, by replacing the gasket - no success. My mechanic tried 4 times, two more gaskets, no success. He refused to try further.

I've been fixing it myself for the last week. I took the whole thing apart, removed the cover from the bike completely, which requires removal of the kickstand, the seat, the battery box, etc. I cleaning it very thorough, applied permatex ultra black into the slot where the plug goes, installed the plug and set the cover under a 50lb weight to press the plug in. Waited 24 hours, applied permatex from the inside and outside around the plug and the wires, sealing every potential source for oil penetration. Then i cleaned everything again, cleaned the engine case, applied a bead of permatex all around and installed the cover. As per Permatex instructions I tightened the bolts by hands, waited an hour and tightened them to spec. Then I waited 24 hours to let permatex cure completely before filling with oil.

This whole process with the 24 hour waiting periods took me a better part of the week. I just assembled everything today, filled with oil, went for a ride, and the god darn thing is dripping oil again.

I have no more time, will, or resourced to go further. I can't keep riding it with the leak either - I do not like oil all over my driveway, and its also a safety issue as the air pushes the oil over the rear tire when riding. A darn shame, I put a bunch of $ and effort into it over the years, and with just 6k miles its no longer repair worthy.

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Re: Well, I reached the end of the line with my S4
Reply #1 - 10/12/22 at 15:05:40
 
Are you certain the cover/plug is the source of the leak? If so maybe pick up a used replacement? It looks like Ebay has quite a few for not much.

https://www.ebay.com/itm/195214093473?chn=ps&norover=1&mkevt=1&mkrid=711-1171...
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Re: Well, I reached the end of the line with my S4
Reply #2 - 10/12/22 at 18:36:30
 
This sounds crazy and frustraiting. I literally have had mine off of my 87 3 times in the last month dealing with starter gears and haven't even changed the gasket until today. The whole time I've had no leaks.

Are you referring to the rubber grommet attached to the stator wiring? If so, there is a chance that it is just cracked and no longer useable. you'd probably be fine just replacing the stator itself with a good one.

Sorry that you are having a hard time mate.
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och
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Re: Well, I reached the end of the line with my S4
Reply #3 - 10/12/22 at 23:02:26
 
It really doesnt look cracked, but even if it is, I applied so much gasket maker to the back of it, it should be sealed. What kinda issue are you having with the starter gears?
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Re: Well, I reached the end of the line with my S4
Reply #4 - 10/12/22 at 23:15:27
 
They all broke Grin so filling a flushing and cleaning out the case a few times before I am willing to ride it again.
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DragBikeMike
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Re: Well, I reached the end of the line with my S4
Reply #5 - 10/13/22 at 12:05:00
 
There is a drain hole in your left-side engine case to allow liquid to drain out of the cavity directly below your starter.  There is also a pressurized oil passage that runs directly behind the starter.  That oil passage utilizes an o-ring at the case joint.

The picture shows the drain hole circled in yellow, and the o-ring joint circled in green.
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Starter_Cavity_Drain.jpg

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DragBikeMike
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Re: Well, I reached the end of the line with my S4
Reply #6 - 10/13/22 at 12:08:08
 
The drain hole in that cavity will dump oil directly on the area where you have a problem.

The starter has an o-ring to seal it to the case.  That o-ring is situated directly above the cavity drain hole.  If it is damaged it will leak oil into the cavity and drain hole.  Remove the starter and check the cavity and o-ring joints for leaks.

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Starter_Oring.jpg

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DragBikeMike
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Re: Well, I reached the end of the line with my S4
Reply #7 - 10/13/22 at 12:12:06
 
Have you checked your engine breather to make sure it's not obstructed?  It's the large hose on the top right-hand side of your cylinder head cover.  Make sure the vent connection on the head is clear (no obstructions), same for the hose, and same for the nipple on your airbox where the hose vents to.
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Engine_Breather_Hose.jpg

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DragBikeMike
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Re: Well, I reached the end of the line with my S4
Reply #8 - 10/13/22 at 12:12:41
 
Dave found one like this not too long ago.
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Daves_Trouble_Call_06_05_21.jpg

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Re: Well, I reached the end of the line with my S4
Reply #9 - 10/13/22 at 12:36:39
 
Thank you Mike, that is a lot of good info. For now I dont want to take everything apart, this thing drained all the energy out of me. Maybe I'll get to it again some day.
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Re: Well, I reached the end of the line with my S4
Reply #10 - 10/13/22 at 13:33:01
 
That drain hole in yellow seems interesting, I definitely need to check it.
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Re: Well, I reached the end of the line with my S4
Reply #11 - 10/13/22 at 14:37:36
 
Mike,

out of curiosity, in your picture what exactly is that obstructing the engine breather? Never seen anything like it.
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Re: Well, I reached the end of the line with my S4
Reply #12 - 10/14/22 at 17:35:38
 
It looks like the screen assembly normally installed inside the head cover.  Possibly someone forgot to install it and tried to backfit (literally).  Dave worked on it so best to inquire with him.  He might have more info.  If the vent is plugged, capped, or otherwise obstructed, it might cause all sorts of leaks in locations such as those described in this post.  Easy enough to check.
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Re: Well, I reached the end of the line with my S4
Reply #13 - 10/15/22 at 13:31:00
 
Mike, thank you so much. Took out the two bolts that hold the starter, and it came out with no effort. The o-ring on the starter doesn't seal at all, so obviously the oil is leaking through the starter o-ring and weeping out of the weep hole on the stator cover. All this time, money, and energy I've spent fixing something that wasn't broken.










My starter was replaced by a local shop about 1.5 years ago. I found an old thread where it turns out Suzuki sells a wrong size o-ring for out starters. I understand the shop did not know that, but the technician working on it should've known something isn't right when installing the new starter and not feeling any effort or feedback when the o-ring snaps in.

This is the old thread.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1183949991/0

Going to research it, and get a new o-ring and hopefully solve this issue for good. On a side note, I see the starter has only one wire going to it, and if I had to guess it seems to be the ground wire since it attached directly to the housing, so it can't be the hot wire. How the hell does the starter work without a positive wire?



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Re: Well, I reached the end of the line with my S4
Reply #14 - 10/15/22 at 13:34:20
 
The wire to the starter is the hot wire.
It grounds through the engine case,the big wire to the rear on the right side of the engine is ground. Trouble ensues when it gets corroded.
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