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03 Vulcan 750
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Discussion Starter · #1 ·
My 2003 VN750 has an oil leak. I haven't been able to pinpoint it. It only leaks when its running and warm. The oil seems to be coming from underneath the left side of the engine. Is there a place where it is a typical leak on these? Does the engine have to be pulled to fix the problem? Am I better off to just trade it off? Already out around $1500 on tires, battery, and mechanics. Any insight on the trouble this repair will be?

Thanks
 

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My 2003 VN750 has an oil leak. I haven't been able to pinpoint it. It only leaks when its running and warm. The oil seems to be coming from underneath the left side of the engine. Is there a place where it is a typical leak on these? Does the engine have to be pulled to fix the problem? Am I better off to just trade it off? Already out around $1500 on tires, battery, and mechanics. Any insight on the trouble this repair will be?

Thanks
Sorry, I have no insight into troubleshooting here. I've had my Vulcan for only about a year now and haven't had this issue. But would you be able to share with me how much tires were? I'm going to need new tires probably in 2022.
 

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How much oil is leaking? I get a few drops here and there on the ground by the side stand. My gut tells me the hacks at the dealership didn’t use any RTV with the gasket when I had the stator replaced. I don’t see it every time. Normally it’ll drip the first time I park after it’s been sitting but it’s so intermittent I can’t pinpoint it. If it’s the stator cover then it can continue to leak because I don’t plan on pulling the engine just for a tiny leak.
 

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03 Vulcan 750
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Discussion Starter · #5 ·
Sorry, I have no insight into troubleshooting here. I've had my Vulcan for only about a year now and haven't had this issue. But would you be able to share with me how much tires were? I'm going to need new tires probably in 2022.
373739890621 is the eBay item number just put it in the search line and it should take you there. $210 for 2 Dunlop tires. They are New Old Stock but I am very pleased.
 

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Its not the round cover. Why does it not drip overnight?
There's also an oil line that runs around the left side.

If budget is a concern for tires, many people have gotten good service from Shinko tires, I ran the 230 Tourmaster but my next set will be the 777. The next oversized is the way to go.
 

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Are you sure it’s not the oil filter? How much is it leaking? If only a few drops and it’s not leaking when cold, I’d just live with it. Just be sure to check your oil levels often.
The oil drips more easily when everything is hot. I would imagine it does leak at night but the drops just stay on the engine. A "pressure" leak should be easy to find because there are only a few places on the bike that can leak under pressure. The oil line, oil filter and pressure sending unit would be the most likely. A gasket or o-ring on the other hand is more likely and harder to spot. Wipe it down and place some paper under her to try and narrow the leak down. Really some leaks are more concerning than others. Most you can live with unless you have a little ocd. Then my suggestion is either (1) don't look or (2) buy a 1970's Harley. They were real leak masters. A few drops may be annoying but, unless you have a huge puddle appearing constantly, not going to hurt anything. For a comparison place a measured 1/2 teaspoon of oil on the concrete, then you will see how big a spot it makes. 1 drop will usually expand to over a quarter size spot and can make you nervous while the actual oil loss is not very much at all.

The only time I had a oil loss problem that concerned me was after a oil change. I didn't tighten the filler cap and it fell off. My leg got drenched and oil sprayed all over. The smoke off the exhaust alerted me to my mistake. Plus it happened right away, withing 5 miles of riding. Even then it was still in the sight glass on the center stand. (The cap landed between the exhaust and frame so I was lucky and could jut put it back on.)
 

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373739890621 is the eBay item number just put it in the search line and it should take you there. $210 for 2 Dunlop tires. They are New Old Stock but I am very pleased.
Thanks. I'll take note of this and keep for next year. I've also been considering white-walled tires or white-letter tires because I love the look. But also it will cost more $$. :/
 

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Thanks. I'll take note of this and keep for next year. I've also been considering white-walled tires or white-letter tires because I love the look. But also it will cost more $$. :/
You can get the Shinko 777 in whitewall.
 

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Thanks. I'll take note of this and keep for next year. I've also been considering white-walled tires or white-letter tires because I love the look. But also it will cost more $$. :/
These are SLEEK looking tires. I like this look
You can get the Shinko 777 in whitewall.
These are SLEEK looking tires. Thank you so much! I took note of this for when I'll need to replace my tires. :)
 

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My 2003 VN750 has an oil leak. I haven't been able to pinpoint it. It only leaks when its running and warm. The oil seems to be coming from underneath the left side of the engine. Is there a place where it is a typical leak on these? Does the engine have to be pulled to fix the problem? Am I better off to just trade it off? Already out around $1500 on tires, battery, and mechanics. Any insight on the trouble this repair will be?

Thanks
So after doing so much work on my bike and had no issues with leaks, I got a stupid leak exactly where you say (sounds like it) and it is the o-ring on the oil drain because I over tighten it!! It’s coming only when is very hot, on side stand, right there on the left , like behind the side stand. If it’s that, It’s less than $10 fix.
If not could be also the generator o-ring (left side round cover with 3 screws). Also under $15 fix.
Don’t panic, take your time, see and think … drain your oil , replace these two or one at the time (up to you) and test it for a few days.
Don’t waste your bike because of frustration! :)
good luck!
 

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This is what deal with normally the first time I cut the engine. It’s normally one or two drops like in the pic. It takes over a year for a spot to form on my pavement big enough for me to break out the degreaser and power washer so I know it’s not a high volume leak but it does annoy me.
Tire Automotive lighting Bicycle tire Automotive tire Tread
 

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How much oil is leaking? I get a few drops here and there on the ground by the side stand. My gut tells me the hacks at the dealership didn’t use any RTV with the gasket when I had the stator replaced. I don’t see it every time. Normally it’ll drip the first time I park after it’s been sitting but it’s so intermittent I can’t pinpoint it. If it’s the stator cover then it can continue to leak because I don’t plan on pulling the engine just for a tiny leak.
This like they just replaced the cover without replacing the rubber seal, they crush after a time and once removed they are useless, check with the garage who did the job if they changed it out or not,
 

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03 Vulcan 750
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Discussion Starter · #17 ·
My 2003 VN750 has an oil leak. I haven't been able to pinpoint it. It only leaks when its running and warm. The oil seems to be coming from underneath the left side of the engine. Is there a place where it is a typical leak on these? Does the engine have to be pulled to fix the problem? Am I better off to just trade it off? Already out around $1500 on tires, battery, and mechanics. Any insight on the trouble this repair will be?

Thanks
Tire Wheel Automotive tire Automotive lighting Tread

I dont know how I missed this but I did till today. I've never seen any oil come from it but I bet thats the culprit. I think I can see the O ring inside the chip. A replacement is ordered. Thoughts?
 

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View attachment 54011
I dont know how I missed this but I did till today. I've never seen any oil come from it but I bet thats the culprit. I think I can see the O ring inside the chip. A replacement is ordered. Thoughts?
Don't over tighten the replacement, just snug is tight enough on that oil screen cap.

Do you know if the screen, rubber washer, and spring are still in there?
 
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