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Discussion Starter #1
Hello,

I'm a new rider and certainly not a mechanic by any stretch of the imagination, so I find myself hear seeking some help with a problem.

I recently purchased an 07 Bouldevard c50 from a private seller which, at the time, seemed to be running just fine. He did say that he'd left some fuel in it for a month or two, so there's the possibility this is all because of bad gas... I rode it home from his place with out issue. The next day, I had some trouble starting it. It wouldn't start without applying a little bit of gas to coax it on. This sort of behavior continued for 4 or 5 days before a new issue arose.

A couple days ago, I noticed that while riding, I was struggling to deliver power to the engine and it began lurching while riding. Even while in neutral and applying some gas you can hear the engine rev up and then the rpms would fall off temporarily before reving up again. This would continue as long as I was applying gas. I had the battery tested, which turned out to be fine, and I added some SeaFoam additive to the gas to see if that might unclog any debris build up in the fuel system.

Last night on my way home from work, I was having some very strong jerking while riding, and I couldn't get the bike up over about 45 mph, regardless of gear. At a certain point, no additional power would go to the engine despite how much throttle I applied.

This morning, I was going to ride around the block to see if the additive had made any progress overnight, only to find that I cannot even get it into first gear! Applying more than a small amount of gas causes the engine to stall out. Letting out the clutch (while applying some gas to prevent a stall) causes it to stall out as well.

I'm at a loss at this point. I've ordered a service manual to hopefully disassemble parts of the fuel system to hopefully find out where there's a clog, if any, but until then I'm not sure what to do or if I'm even on the right path.

Any suggestions?

Thanks in advance!
 

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Welcome to the family here. Sorry to read of your problems, more sorry to read that someone sold you a mc with obviously known problems. Hope someone here can help get you started fixing the problem.
 

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Welcome - hope you get things worked out, unfortunately I have no advice for you, but someone here will.
 

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Discussion Starter #4
These issues weren't obvious when I bought the bike, and the owner may not have known that they were there. They may be nothing more than a clogged fuel filter, resulting from the fuel sitting in the tank for awhile. I don't think there was any malice in selling the bike to me, just the perfect combination of neglect and ignorance...
 

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So spit balling ideas i go way outside the box and let the really smart people here refine my thinking with Logic. SO dont listen to me 100% im just trying to shoot out some ideas.

1. Clutch and throttle cable adjustment. - Clutch cable would lead to the stalling and lack of 1st, throttle might enplane the lack of power and the pulsing you fee. once you get t your guide the steps are simple to adjust both of these.

2. Bad gas mixed with clogged fuel system. - i wold say pop the tank off empty it and start with fresh gas (also drain as much of the system as possible let it idle till it dies) mix in a carb and FI cleaner Seafoam is awesome but from what i know it is more for carbon buildup not fuel gunk(someone correct me if im wrong).

3. way left field bad Fuel pump - just seems like it has a problem delivering fuel.

Hope this helps narrow down the issue, and im sure more people will chime in and help out.
 

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So spit balling ideas i go way outside the box and let the really smart people here refine my thinking with Logic. SO dont listen to me 100% im just trying to shoot out some ideas.

1. Clutch and throttle cable adjustment. - Clutch cable would lead to the stalling and lack of 1st, throttle might enplane the lack of power and the pulsing you fee. once you get t your guide the steps are simple to adjust both of these.

2. Bad gas mixed with clogged fuel system. - i wold say pop the tank off empty it and start with fresh gas (also drain as much of the system as possible let it idle till it dies) mix in a carb and FI cleaner Seafoam is awesome but from what i know it is more for carbon buildup not fuel gunk(someone correct me if im wrong).

3. way left field bad Fuel pump - just seems like it has a problem delivering fuel.

Hope this helps narrow down the issue, and im sure more people will chime in and help out.
It's an 07 so it's FI. It's possibly a dirty injector.
 

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Here's my 2 cents...

Do the 07's have the same fuel valve as my '01? They are vacuum actuated and the small vacuum tube deteriorates over time and loses vacuum and starving the fuel pump/engine of fuel, leading to some of the same symptoms our new member (Welcome from Boston!) is having.

Can anyone confirm this fuel valve is the same? THX
 
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Discussion Starter #8
Fwiw, this is my pump filter assembly. I'm not sure if it's dirty or not by looking at it, but there was a sand like substance in the plastic piece containing the filter. Could be the sea foam additive or something else.. not sure. Any ideas?
 

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Discussion Starter #9
So I wound up just taking it to a mechanic, and sure enough the fuel injectors were clogged up. They were able to clean em out for about 350 bucks. I was worried that they would have to replace them which was not going to be cheap.

Anywho, I have been riding for a couple days now (I picked it up on Wednesday) and some of the same symptoms are slowly returning: stalling out at idle/beginning to apply gas from a stop, and low top speed/low acceleration. I'm having trouble keeping up with traffic from a stop and most of the other vehicles pass me because applying more throttle doesn't speed me up.

I did some searching and found some people suggested similar symptoms could be caused by a slipping clutch, but were almost always accompanied with the explanation that the bike would rev up without gaining speed. I don't have those symptoms per-se, but I did notice that I felt like I had to shift up sooner than I thought I should, relative to my speed/acceleration. So that's on the table too I suppose. Anyways, the shop said they'd warranty the service for 30 days (typically 14, but the mechanic was sure this was the problem) and I'm well inside that, so come Monday I think I'm going to ride over there (if I can) and tell em I'm still having problems. Hopefully this bike doesn't dig me a grave sitting in their shop.
 

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Tough time of year for this kind of troubleshooting. Hopefully shop will have a second solution for you.
And welcome from Worcester!
 

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Welcome from Penciltucky.
 

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new rider, c50 problems

I recently purchased an 05 C50 that had sat for 9 mos. Idled fine would not rev without dying. Tried seafoam -no improvement. Took to mechanic he cleaned injectors, trial rode and not happy. He took throttle bodies off ,removed injectors ,cleaned. Still not running right. He checked valve clearances-which were OK. He tore into the fuel system again. He cleaned fuel rails, intense cleaning of throttle bodies and injectors. This solved my problems. He charged me $300 which I felt was a very fair price. PS he also changed out the Vance/Hines pipes back to the OEM pipes which he had in his shop from a prior swap. This was between the 1st and second injector cleaningThis made no difference but eliminated the possibility of a fuel/air imbalance. I had replaced the fuel pump myself before taking bike to mechanic. Hope this is of some help with your problems. Ride SAFE
 

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Discussion Starter #13
So I installed a new fuel pump and have apparently only made my problems worse...

It didn't even occur to me that I would have to prime the fuel pump more than it would typically do when you turn on the bike, so I just flipped on the kill switch, started, and instant stall. Started again, and at least got it running for a minute. I noticed I still didn't have very much power as I started to roll off, and bang, stalled again. This time, the bike is borked. Flipped the kill switch off and on again, and nothing. No fuel pump prime sound, and where there was some information on the display, it's now blank. My lights and at least my neutral indicator still work, and the starter works but the bike doesn't start running. It sounds like the engine is turning over but just won't start. I can apply a little fuel with the throttle and it does sound like it's having some effect (not sure if good or bad) but ultimately doesn't start...

I'm hoping that I can reinstall the old pump and these issues will go away (doubtful) so I can at least get the bike running enough to drive it back to the mechanic.
 

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... there was a sand like substance in the plastic piece containing the filter.
I would think that you really need to look for the source of this contaminant. Is it possible that the pump or filter or some other part has deteriorated? Previous owner dumping harsh solvent such as acetone in an effort to "clean" the injectors? In looking on ebarf it seems that the actual pump is not very expensive, about $25, but the whole pump assembly is in excess of $300. Are you sure the tank has been thoroughly flushed out?
 

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running problems

When I changed out fuel pump, somehow I blew a fuse in the fuse pac down by the left foot area. I would check there to see if fuse is blown. It caused many things on bike not to work, inc speedo infp. Replacd fuse--back in business.Think that may be your problem. Then back to your mechanic.My guess is he did not get the fuel system clean enough and crap is building up and restricting fuel flow thru injectors.
 

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So I wound up just taking it to a mechanic, and sure enough the fuel injectors were clogged up. They were able to clean em out for about 350 bucks. I was worried that they would have to replace them which was not going to be cheap.

Anywho, I have been riding for a couple days now (I picked it up on Wednesday) and some of the same symptoms are slowly returning: stalling out at idle/beginning to apply gas from a stop, and low top speed/low acceleration. I'm having trouble keeping up with traffic from a stop and most of the other vehicles pass me because applying more throttle doesn't speed me up.

I did some searching and found some people suggested similar symptoms could be caused by a slipping clutch, but were almost always accompanied with the explanation that the bike would rev up without gaining speed. I don't have those symptoms per-se, but I did notice that I felt like I had to shift up sooner than I thought I should, relative to my speed/acceleration. So that's on the table too I suppose. Anyways, the shop said they'd warranty the service for 30 days (typically 14, but the mechanic was sure this was the problem) and I'm well inside that, so come Monday I think I'm going to ride over there (if I can) and tell em I'm still having problems. Hopefully this bike doesn't dig me a grave sitting in their shop.
Did you ever figure out what the problem was I just bought one from somebody he put a thousand miles on it and 11 years 205 Boulevard C50 and I'm having the same problem
 
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