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Discussion Starter #1
So I’ve got a 750 that has been sitting for quite some time that my uncle gave me. I figure how hard can it be to get it running? Well, After draining the tank, changing all fluids, replacing plugs it is now running. When I first got it started it would run at idle but stalled as soon as you touched the throttle. After a bottle or three of carb cleaner and half tank of new fuel with sea foam through it now runs but won’t idle. I’m able to ride it, but I have to keep the throttle up to keep it running when stopped. I look like a tool revving a stock 750 at every traffic light. I’m currently at a loss. I don’t know what else to do at this point to get it to idle. Any suggestion or feedback would be helpful and appreciated.
 

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Discussion Starter #2
Failed to mention that I also replaced the stock air cleaners with K&N air cleaners. No ear shave, just the K&N replacment filter.
 

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I had a similar problem when I got my Vulcan. She had been sitting for 2 years. Some of the veterans might give you more specific advise, but I would just leave the choke on a bit so you don’t have to keep on the throttle, and keep running that Seafoam. Mine took several tanks before all of my carb issues went away. Good luck!


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Sounds like the pilot jet(s) in the carbs are plugged up or nearly so. Seafoam might be able to clean the carbs out on its own, but don't be surprised if you have to pull the carbs apart and clean them yourself.
 

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Yeah, you can also get to the pilot jets without completely removing the carbs. You gotta unseat them a little bit and shift them, but it's possible. I took the stock pilot jets from mine and soaked them in ChemDip for a few weeks, nothing, still completely clogged, and ChemDip is WAY WAY stronger than Seafoam. Sometimes after such a long time those tiny holes are just plain clogged unless you clean them out with the right sized drill bit or maybe some guitar strings, but best bet is some new pilot jets.

pjmotorsports.com is my favorite place for jets. look in my signature for the part number you'll need. Stock pilots should be fine, you'll need 2 (one for each carb, of course)
 

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Clogged Pilot Jet for sure. Seafoam is good when there is some flow, it dissolves the crud which gets carried away. Probably going to have to mechanically clean the jets or simply replace them. I have a spare set I keep cleaned in a dime bag so I can simply swap them out.
 

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Discussion Starter #8
So supposedly from a lot of reading there is a way to get to the pilot jet without completely removing the carb. I can’t seem to find anything that I’ve read or watched that shows me how this can be done. Does anyone have any good videos on this task or should I just remove the whole carb?

I’m really starting to think this is a job for a professional. Unless someone can prove to me that it isn’t as hard as it looks. I’m no mechanic but I’m pretty handy. I’ve worked on cars and small engine carbs with success, but this looks mich more involved that I want to get. I don’t know if I want to tackle this and getting halfway through it and needing to take it somewhere is only going to cause more problems and cost more. There is literately ZERO room around these carbs. Any advice??
 

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I've been able to get them out without fully removing the carbs, but I don't have the stock intake system and did still have to unseat the carbs from the cylinder head intake boots, which would probably not be possible with the stock airbox in place, maybe it is though, I've never tried. You can use a small or right-angle screwdriver to get the float bowls off and get to the pilot jets to replace.

Even though the pilot jets may be the whole problem, they could also be a PART of the problem, with some of the carb passages are gummed up. Get a couple quotes from shops if you don't feel comfortable doing so, but honestly the carbs aren't that difficult, and it's a satisfying job if you like that kinda stuff. No matter what way you approach it, it's a difficult job, but I reckon it's somewhat of a rite of passage around here. We've ALL had to deal with the carbs at some point, myself included.

BTW where do you live?
 

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Somebody in the past few months posted the correct sizes to swap the screws for hex heads. If keeping the airbox, and possibly inclined to pull the jets this way, it's highly recommended.

As ubertall said, a clogged passage will probably require pulling the carbs.

I started using a cheap ultrasonic cleaner with white vinegar to clean jets. Works great, even the ones with concrete in them. Still have to rod them out with wire, but they soften right up.
 

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Discussion Starter #11
I've been able to get them out without fully removing the carbs, but I don't have the stock intake system and did still have to unseat the carbs from the cylinder head intake boots, which would probably not be possible with the stock airbox in place, maybe it is though, I've never tried. You can use a small or right-angle screwdriver to get the float bowls off and get to the pilot jets to replace.

Even though the pilot jets may be the whole problem, they could also be a PART of the problem, with some of the carb passages are gummed up. Get a couple quotes from shops if you don't feel comfortable doing so, but honestly the carbs aren't that difficult, and it's a satisfying job if you like that kinda stuff. No matter what way you approach it, it's a difficult job, but I reckon it's somewhat of a rite of passage around here. We've ALL had to deal with the carbs at some point, myself included.

BTW where do you live?
Thanks for the info. I am in PA. Just outside of Pittsburgh.
 

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Thanks for the info. I am in PA. Just outside of Pittsburgh.
I'll be there for the game next Sunday against the Falcon's! :smiley_th:pepper::pepper:
 

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Another one of our active members is near Pittsburgh, forget who it is right now. Think he has it listed with his avatar, he knows the VN though.
 

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Discussion Starter #14
Another one of our active members is near Pittsburgh, forget who it is right now. Think he has it listed with his avatar, he knows the VN though.
This would be awesome if I could figure out who it is. If he has experience with a carb clean, I’d pay him to sit there and tell me what needs to be done!
 

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FREEBIRDS MC CENTRAL NY
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Shark88 is in Central PA, awesome dude.

Sent from my Z899VL using Tapatalk
 

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Discussion Starter #16
Still working at getting this thing running. I’ve tried everything and am almost there but I still can get it running.

Fresh Oil...check
New Plugs...check
New Battery...check
New Air Filters...check
Fresh Fuel...check
Seafoam soakerd carbs...check

I’m to the point where the bike fires for a second or two then dies. If I try to fire it up again it won’t but if I let it sit for a minute or two it will do the same thing again.

Any thoughts on where too next? I’m so close but still not running. I do see the oil level is a bit low. It’s at the very bottom of the sight glass. Not sure if the bike has it or not, but Could this be killing the engine before I even get to see it run. Vac line and fuel lines seem to be good. Fuel is flowing through carbs when pulling vac on petcock line so I don’t think it’s a fuel delivery issue. Carb seems to be clean even when I drained it for the first time. Plugs are dry so I don’t think it’s flooding. I currently have the air filters off the bike while i was investigating. I’m trying to start it with they off and I do hear a poof of air. I didn’t think it was necessary to have them on to start it but correct me if I am wrong.

I’m at a loss right now...what are some of your thoughts?
 

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I don't know if it's a reason for your bike not running but the oil level should be nearly to the top of the sight glass. There's a horizontal mark there.

I wouldn't run one with low oil.
 

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You might get it started with some starting fluid, be ready for backfire. But it sounds like some jets and/or passages are plugged up in the carbs. Requires a teardown, soak, and hosing to get them clean again.

There's the enrichment circuit (choke/cold starting), pilot jet (idle to 2000rpm), and main jet (2000rpm to 14k). Just seafoam sitting in the bowls won't help those.
 

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FREEBIRDS MC CENTRAL NY
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You might get it started with some starting fluid, be ready for backfire. But it sounds like some jets and/or passages are plugged up in the carbs. Requires a teardown, soak, and hosing to get them clean again.

There's the enrichment circuit (choke/cold starting), pilot jet (idle to 2000rpm), and main jet (2000rpm to 14k). Just seafoam sitting in the bowls won't help those.
Wow 14k? I've had mine at 9500... Lol just busting

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Wow 14k? I've had mine at 9500... Lol just busting

Sent from my Z899VL using Tapatalk
:smile2: That's where the needle stops ain't it? Think I've been to 11 or 12k, tad above redline anyway, shows no sign of peaking out. Too hard to be looking around when the road is that fast. >:)
 
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