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Buddy losses throttle during driving...

 
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Kingcake
Member


Joined: 11 Nov 2015
Posts: 2
Location: New Orleans
Buddy 150

PostPosted: Tue Dec 15, 2015 8:35 pm    Post subject: Buddy losses throttle during driving... Reply with quote

Hello,

This is my first post here. I own a 2009 Buddy 150 International Pamplona that I purchased used a few months ago.

First off, I love the thing! I've put over 1500 miles on it since I got it sometime in mid October. I cannot imagine life now without it.

Yet, there has been this really annoying issue that has left me stranded on the side of the road - usually when I am pretty far away from home and once at 1am! I have brought it to the local mechanic for the issue but still the problem persists. I hope that posting the symptoms here someone will have an idea as to the issue.

- While driving, throttle starts skipping to the point of full engine kill. This has happened about 5-7 times.

- After the engine kills, I cannot start it up again for some time. Not sure the correct language here, but it tries to start. It turns, yet doesn't fire. I just have to keep trying to start. During this time it'll go from completely not firing, to starting then killing, to starting and able to drive for a moment then kill, to finally starting with no other issues.

- I believe a common link is having less than half a tank, closer to 25% tank, of fuel left. On most of these occasions I have taken it to the nearest gas station and filled up. After filling up today, still had a small issue starting, but afterwards drove home with no issue.

- Another common link I believe is that the issue usually happens after a good long drive. Today's episode was about an hour drive, then sitting for 20 in a parking lot, then killed 5 minutes later.

- Also, after today's episode, I found some success starting it up without the gas cap. Seems to like that a bit.

- The gas cap is vented. I have one small hole at the top of the gas cap.

- Also, bought Seafoam last month and have added to about 4 tanks of gas overall.

I have brought the bike to my local mechanic who did a carburetor clean, changed the spark plug, changed the oil, and changed the fuel filter. He cleaned the carburetor (stating some debris was around) and stated some sort of ring was not placed correctly, and so corrected the placement.

With these symptoms listed, anyone have a suggestion of what I should do? Thanks for reading and for any help provided.
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DeeDee
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Joined: 26 Jul 2014
Posts: 725
Location: Denver
buddy 170i

PostPosted: Tue Dec 15, 2015 8:38 pm    Post subject: Reply with quote

Surprised

Last edited by DeeDee on Wed Dec 16, 2015 4:21 am; edited 2 times in total
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az_slynch
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Joined: 12 Sep 2012
Posts: 1766
Location: Tucson, AZ
'18 Spade, '16 K-Pipe, '13 Stella 4T, '12 Yager GT200i, '81 Vespa P200e and Far Too Many Others

PostPosted: Tue Dec 15, 2015 11:20 pm    Post subject: Re: Buddy losses throttle during driving... Reply with quote

Kingcake wrote:
I have brought the bike to my local mechanic who did a carburetor clean, changed the spark plug, changed the oil, and changed the fuel filter. He cleaned the carburetor (stating some debris was around) and stated some sort of ring was not placed correctly, and so corrected the placement.


The ring mentioned is probably the vacuum diaphragm sealing ring. Here is a good thread referencing it:

http://www.modernbuddy.com/forum/topic27908.html

Since you've vented the gas cap, I would consider checking the fuel tap. Make sure there isn't anything in the tank that could be inhibiting fuel flow at lower fuel levels. Another item to check would be that the fuel tap is getting sufficient vacuum from the engine to keep the valve fully open. Check the smaller line that runs from the intake manifold to the fuel tank for secure connections and make sure there's no fuel in the smaller line.

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jrsjr
Moderator Emeritus


Joined: 09 Jun 2006
Posts: 3932


PostPosted: Wed Dec 16, 2015 12:44 am    Post subject: Re: Buddy losses throttle during driving... Reply with quote

Kingcake wrote:
Hello,

This is my first post here. I own a 2009 Buddy 150 International Pamplona that I purchased used a few months ago.

First off, I love the thing! I've put over 1500 miles on it since I got it sometime in mid October. I cannot imagine life now without it.

Welcome to Modern Buddy. You definitely sound like our kinda people!

Now I'm going to get out of the way so the folks who know what they are talking about can help.
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avescoots1134
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Joined: 06 Oct 2014
Posts: 279


PostPosted: Wed Dec 16, 2015 1:37 am    Post subject: Reply with quote

Sounds like you didn't bring it to a real mechanic!
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avescoots1134
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Joined: 06 Oct 2014
Posts: 279


PostPosted: Wed Dec 16, 2015 1:40 am    Post subject: Reply with quote

That's the vacuum operated petcock acting up. If you would have brought it to me you would have saved a lot of money!
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k1dude
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Joined: 08 Jun 2008
Posts: 2422
Location: Northern California
'08 Orange Buddy 125

PostPosted: Wed Dec 16, 2015 10:55 am    Post subject: Reply with quote

It sounds like you have a bad stator.

Last edited by k1dude on Tue Dec 22, 2015 7:29 pm; edited 1 time in total
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Drew
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Joined: 03 Jul 2007
Posts: 105
Location: Bucks County, PA
2008 Red Genuine Buddy 125

PostPosted: Wed Dec 16, 2015 1:58 pm    Post subject: Reply with quote

This may not be what is causing your problem but it is easy to rule out. I had similar symptoms on my Buddy. It would intermittently start missing and sometimes stop. Check your spark plug wire. It just pushes on to the spark plug and over time it can stop fitting as tightly. Then when it is loose you can get the throttle skipping. It's worth checking out. Replacing my spark plug wire fixed it for me.
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Kingcake
Member


Joined: 11 Nov 2015
Posts: 2
Location: New Orleans
Buddy 150

PostPosted: Thu Dec 17, 2015 5:36 pm    Post subject: Reply with quote

Thanks for all the suggestions. I am going to look into troubleshooting and whether I can manage these tips myself or bring back to the mechanic with these suggestions.

avescoots1134 - It seems that part is fairly inexpensive and that you seem pretty confident in it being the cause. What is the difficultly of changing the part? I don't mind getting my hands dirty and learning, but don't want to get over my head.
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babblefish
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Joined: 04 Dec 2007
Posts: 2991
Location: San Francisco
2006 Blur 180, 2008 Buddy St. Tropez

PostPosted: Mon Dec 21, 2015 4:33 am    Post subject: Reply with quote

So did the problem go away after your mechanic worked on it? If not, then it definitely sounds like a fuel starvation problem to me. I agree with avescoots, check the fuel petcock and it's related hoses including the vacuum line that opens the petcock and allows it to supply fuel to the carb.
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