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Cdnrider
| | Posted on Wednesday, April 03, 2019 - 01:10 am: | 
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I purchased an 01 with 22k miles for $500 and had it running until it choked out and died at idle. I disassembled the carb and found the main jet brown and clogged beyond conceivable use, and a cigarette worth of debris in the fuel line. I’ve since reassembled everything and now the bike won’t rev or accelerate over 2000 rpm and chokes to nearly dying above 2k.
I replaced the float bowl gasket, and the fuel pin but it still bleeds. Ive checked everything except cylinder pressure, but I’m at a loss.
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Gabby_duck
| | Posted on Wednesday, April 03, 2019 - 08:50 am: |
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What is the fuel pin? I would remove carb again. With carb cleaner spray can and extension nozzle spray each port. Remove float and needle. Spray the needle seat. Inspect accelerator pump diagram. Probably still have a small particle of debris in one of the ports.I had a small piece of brass from removing a jet causing my issue.wear safety glasses when spraying |
Cdnrider
| | Posted on Wednesday, April 03, 2019 - 06:13 pm: |
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Sorry, needle. I put a new needle on suspecting that it was worn despite looking brand new. Waste of $20. Yes, that is an issue and I’ll look again at the whole picture once more...I’ve sprayed the carb countless times. My biggest issue is the revving. Why is it dying just above idle? I have video and I’ll try uploading it to YouTube and link it here tonight. It’s driving me mental and I’m contemplating a new carb but hoping it’s not needed. |
Gabby_duck
| | Posted on Wednesday, April 03, 2019 - 08:39 pm: |
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https://youtu.be/3FmfO-mWv3Q
This guy gets gives good tips on a typical CV carb. Tips Can be applied to any carb. |
Gabby_duck
| | Posted on Monday, April 08, 2019 - 03:51 am: |
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https://youtu.be/dDqHi5Smodw |
Gabby_duck
| | Posted on Tuesday, April 09, 2019 - 05:11 am: |
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https://youtu.be/IbTfVbDFGKQ |
Cdnrider
| | Posted on Monday, April 15, 2019 - 10:43 am: |
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So I feel I’ve fixed 90% of my problems because I retuned the fuel mixture needle and feel I’m close to where I need to be. It seems that in my haste after purging debris out of the fuel line that I overlooked the pathway from the line to the floatbowl and purged that too. I may purchase new fuel line just to be 100% sure. So now I run pretty clean, but about 1/2-3/4 miles in the bike chokes down as though it’s run out of fuel. Most times if I clutch and rev thru it will resuscitate, but this will happen several times in a test ride. I’m going to retest to ensure my top end on the carb is sealed with the tip from your YouTube links which were immensely helpful. Roma Custom Bikes actually gave me the tip I needed to mess with the fuel mixture.
Anyway, thanks muchly for the tips thus far and hopefully I get this broken bird running clean, I chopped my saddle last night and will recover the seat sometime this week. Any tips on building a back end would be appreciated! soon!
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Cdnrider
| | Posted on Tuesday, April 16, 2019 - 01:11 am: |
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I also noticed something odd. The charcoal canister has been removed and the PVC valve that sits in the cylinder head is extremely loose. Wondering if this is normal and if this could be causing my loss of pressure. In rerouted the hose straight from my air filter to the pvc valve and removed the massive snake of hoses that originally ran to the canister and drain hose at the rear of the bike. Thoughts? |
Gabby_duck
| | Posted on Wednesday, April 17, 2019 - 12:36 pm: |
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Loose pvc wouldn't be correct. I don't know your bike,mine is a 09 Ulysses. The PVC is held in with rubber grommet not loose. |
Cdnrider
| | Posted on Wednesday, April 17, 2019 - 11:19 pm: |
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I’ve read that the new pvc valves have an o-ring to seal better, but my 01 was pushed out of the factory like this. The service guy at HD (who won’t look at my bike, but will answer my questions) said that it’s not a power loss concern. Turns out previous owner must have replaced the float and never adjusted the needle. Apparently my issue could be one of running out of fuel in the float bowl due to ill-adjusted fuel valve position whilst riding - essentially burning more than back-fills. Not positive. I readjusted and it’s certainly better but still stalling. Since it was a warm evening i actually rode in shorts tonight and noticed a whisp of wine on my left leg when I revved. Appears to be a small leak at the head gasket with a little oil residue, not massive, but leaks are never good and could contribute to the dirty acceleration on the top end of the revs I assume. I’ll have it apart tomorrow since I didn’t sleep much last night. Lol
I’m hoping this is it, then I can bring it to a local shop to have them run compression tests and give it a little look-over/tune up. Let me know your thoughts on anhead gasket leak causing either power loss under load and stalling. Seems the bike resets to fire up immediately after it stalls completely. It runs really rough while I fight to keep the engine alive by revving the throttle so it’s almost better to let it die, then restart rather than fighting it. |
Gabby_duck
| | Posted on Thursday, April 18, 2019 - 12:22 am: |
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Head gasket or valve cover leak ? |
Cdnrider
| | Posted on Thursday, April 18, 2019 - 11:27 am: |
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It’s at the top of the cooling fins, a small leak that puffs smoke when i rev. The leak is below the 1/2” bolt on the front left side of the cylinder. I was going to pick up a torque socket wrench bc I figured on replacing it. I just wonder if this could be a reason for the sudden drop in power. I’m just baffled. I would think that at speed the loss in compression may contribute, and certainly on the top end of the rev range I can see it. It’s just odd that it still acts like it’s running out of fuel despite having readjusting the float (which was way off). Basically the spring on the fuel valve attached to the float was fully compressed at a 15° angle, that is now corrected. |
Akbuell
| | Posted on Thursday, April 18, 2019 - 12:16 pm: |
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Have you checked to make sure the fuel tank vent is working properly? Quick check - try running it with the gas cap loose, and see if the problem goes away.
And has nothing to do with the smoke puffs.
Hope this helps, Dave |
Cdnrider
| | Posted on Thursday, April 18, 2019 - 12:40 pm: |
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Thanks Dave. Trust me when I say that I’ve (pardon the pun) exhausted most options. One item I haven’t checked is the exhaust packing...that’s something I had recently read. Being that the fuel lines were packed with swamp weeds it’s potentially reasonable to assume that the pipe is choked too - though that would be a complete performance issue. Mine is more of lack of fuel or air. Rides clean up to certain rpm, then stalls as though out of gas, then starts right up and rides clean again.
That’s why the fortune of riding in shorts last night brought to light the head gasket leak - feeling puffs of breeze on my leg then noticing the small puffs blue smoke.
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Gabby_duck
| | Posted on Thursday, April 18, 2019 - 02:59 pm: |
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Pull the head and get that head gasket /leak repaired. Yes you could lose power and it will get worst etc heck oil is getting on you. |
Cdnrider
| | Posted on Saturday, April 20, 2019 - 02:20 am: |
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Easy peasy. Figured it may be harder to disassemble the engine but 90 mins and I was down. Booya. So I’m off to harley to get a new gasket tomorrow as this one appears a little deformed. Maybe I’ll consider replacing the others above it just for shits n giggles since the red residue on the rocker cover seemed to peel and fasten to the cylinder a little. Anyway, the piston head is filthy. Like covered with burned residue dirty. Have a look. Curious on your thoughts.
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Gabby_duck
| | Posted on Saturday, April 20, 2019 - 05:59 am: |
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Lower picture looks like leaking gasket. Install new head bolts.
https://youtu.be/wFZANcHY57Q |
Cdnrider
| | Posted on Saturday, April 20, 2019 - 10:48 pm: |
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Did a top end fix up. Took it down to the cylinder and replaced all the gaskets. Seems to pull much stronger now but still gags after 20-30 seconds. I tweaked the float needle a little more and I’m just not sure. Driving me mental. It rides super clean then starts hesitating, then dies. Starts immediately, sometimes before coming to a stop and goes again for another 30-iso second. I’m way beyond the recommended 15° float adjustment spec but it still dies out. Wondering wtf. |
Gabby_duck
| | Posted on Sunday, April 21, 2019 - 07:10 am: |
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Does it idle good cold and hot? Is it happening during constant steady or under acceleration. |
Cdnrider
| | Posted on Sunday, April 21, 2019 - 11:12 am: |
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Idles perfect and stalls mostly under constant speed. If I crack the throttle when it’s sputtering it comes to life but eventually just dies, then I can restart it. |
Gabby_duck
| | Posted on Sunday, April 21, 2019 - 11:42 am: |
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Look at the plug color are you running rich or lean. Lookup plug color chart.you should be able to add more fuel or take away. (fuel air ratio) |
Gabby_duck
| | Posted on Sunday, April 21, 2019 - 11:51 am: |
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https://youtu.be/W_69DUsc4uk |
Gabby_duck
| | Posted on Sunday, April 21, 2019 - 12:30 pm: |
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https://youtu.be/1fDNg4LIfvo |
Cdnrider
| | Posted on Sunday, April 21, 2019 - 05:06 pm: |
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It was definitely running rich, the piston has lots of carbon as does the plug. I will get a new plug even tho this one fires and I cleaned it thoroughly with a steel brush. I already went down the air/fuel mix route but maybe I need to revisit. The blast doesn’t have a tach so I can not accurately gauge the rpm, so I adjust the throttle screw by ear then shut my adjustment needle, back it out 1.5 turns, start the bike and draw the adjustment screw back until the idle stops increasing and that is what I gauge to be the optimal start point. Maybe I need to start dialing that back and see how it affects the operation. I’m positive it has to do with either the float needle or the richness, it acts as though it’s running out of fuel. Best description I can give it, so it’s possible that either I need to adjust the float further or possible it’s too rich and bogs down the engine over a short time. Not positive. I’m mechanically inclined but no mechanic. Lol |
Gabby_duck
| | Posted on Sunday, April 21, 2019 - 10:01 pm: |
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The float definitely needs to be adjusted per manufacturer spec. I haven't adjusted one in a while.The one I adjusted was a Holly 5200 . There's float drop adjustment by bending a metal tab and measuring with with a ruler needle and seat close then flipping it over and doing the same with the seat and needle open
I would get a rebuild kit or new carb. Your now officially
a mechanic |
Cdnrider
| | Posted on Monday, April 22, 2019 - 12:47 am: |
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I ran the float as best I can to ensure I have enough fuel in the carb as I ride and it still stalls after a 1/4 mile or so of even rev riding around 45mph. Always at nearly the same mark. I started from zero on the fuel mixture screw and brought it out 1.5 turns, warmed up the bike and adjusted it to max rev by mix needle alone and rolled it out an extra 1/8 turn. Still dies. I’m lost. Top end of the engine is leak free, bottom end is clean too - no drips. If I rev the engine to higher rpm it’ll keep running, but be choppy - and if I let go the engine will straight choke out and die. I’m considering replacing the auto enriched with a manual choke to remove one potential glitch, though I doubt that’s it.
Is it possible that the muffler is causing issue in terms of poor flow or would it also cause issues at idle as well? It still strangely feels like it’s running out of fuel or having either too much or too little fuel/air. I’ll head to the gas station and see if a fresh batch of 91 octane will cure the issue, and I’ll swap to a fresh plug too. The fact that it’ll idle forever without issue and operate at low speed/low rpm is what has me baffled. I checked both needles again and they’re both clean. The carb looks to be 100% in so far as I can tell. Could this be TPS? I’m not exactly sure what it’s function is on the bike to be honest |
Cdnrider
| | Posted on Monday, April 22, 2019 - 01:18 am: |
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Update - I read a string on BWB that included discussion about disconnecting the TPS. That was bad news for me. Ran extremely rough and the bike didn’t like that at all. It lurched horribly and was really cranky. Died several times on the same 1/4 mile stretch and I was unable to keep the engine alive by revving this time. |
Gabby_duck
| | Posted on Monday, April 22, 2019 - 05:04 am: |
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Hang in there. I have been through similar situation. At the end you will be a better
Mechanic etc... Do you have a service manual on this bike? That will be a must. |
Gabby_duck
| | Posted on Monday, April 22, 2019 - 05:09 am: |
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https://st-paul-harley-davidson-buell.myshopify.co m/search?q=Buell+blast
Parts catalog and service manual plus parts and more |
Cdnrider
| | Posted on Monday, April 22, 2019 - 08:20 am: |
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Oh hell yes. Got it all. Bike came w the factory manual |
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