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Reuel
Posted on Saturday, July 19, 2008 - 03:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check the exhaust bolts, too, but it's probably what Swampy said.
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Kovert
Posted on Monday, July 21, 2008 - 12:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok so I returned home from my 40 mile one way commute. I pull in my garage, hop off the bike, and hang up my coat and helmet. The bike is idling fine at this point, well all of a sudden I see it shake violently then shut off.

I try to restart it, it just turns.

I look and the wire popped off the plug, and the part that screws off the electrode is stuck in the wire. Well I fix that and chock it up to a messed up plug, then attempt to restart.

It restarts but all I hear is a loud banging that comes from the bottom of the engine, or top of the primary. Hard to tell, but I turn it off immediately and left it because I was going away for the weekend. I didn't bother trying to restart obviously something more severe is going on, but does anyone have ANY idea where to start? the banging is definitely about the same at the RPM.

It's a 03 Blast with about 3500 miles on it BTW. Thanks!
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Ezblast
Posted on Monday, July 21, 2008 - 01:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did your primary adjustment bolt loosen up - I'd get into my primary ASAP.
EZ
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Kovert
Posted on Monday, July 21, 2008 - 01:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will pop it all off tonight, I adjusted the primary using the guidance here last week and all was fine. What's the worst case scenario I am looking for when I pop it open though?
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Ezblast
Posted on Monday, July 21, 2008 - 04:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Either of the large bolts could need tightening, or simply need to replace your tensioner shoe.
EZ
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Ezblast
Posted on Monday, July 21, 2008 - 04:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If it looks like neither, then also check timing - another persons ignition module got loose, moved a few degrees and he thought his engine was going to blow, readjusted and he was good as gold.
EZ
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Reuel
Posted on Monday, July 21, 2008 - 06:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You could start it up and rev it until it stops banging. That way, whatever is letting loose will make itself really known. I'm KIDDING! DON'T DO THAT! Just start taking it apart until you find something that's terribly amiss. Ignition timing will make it knock, but if it's banging violently, it's most likely something more severe.

After thinking this over, I'd say go after the primary first. If the shoe let loose and is floating around in the primary case, it could be causing your symptoms.

If everything looks fine in there, put the rear wheel up on a stand of some sort, put the transmission in 5th gear, pull the spark plug, and turn the engine using the rear wheel. That should allow you to listen to any strange sounds without the noise of the engine running or the dangers of something breaking because it won't bend. If you hear noises, follow them. Good luck!
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Swampy
Posted on Monday, July 21, 2008 - 08:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check your upper engine isolator, "Do Not Remove" bracket and the bolts that hold it to the head. If one of those goes, it could allow the vibrations and knocking sound.
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Gearheaderiko
Posted on Tuesday, July 22, 2008 - 01:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Welcome Kovert!
AVOID just ripping into the engine. Thats a bad and time consuming way to diagnose. Very strange that everything was fine, no hints of any trouble, then BANG.
I agree with everything stated so far (except pulling the engine apart).
Check the oil. Drain it and refill if in doubt (since getting it to normal operating temperature would be bad at this point).
Recheck the primary adjustment. Measure where it is now. If the shoe went, its likely the bolt will thread all the way in.
Static time the bike. That will also give you the opportunity jack the bike up, pull the plug and check for noises. Mark where the timing is before you start.
Did it run okay when you restarted it (except the banging)?
After you check all the above stuff let us know what you find, if anything.
There are other things you can check without pulling the engine apart.
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Kovert
Posted on Tuesday, July 22, 2008 - 08:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I can tell you it was running fine actually. Only issue I had was it bogging if I tried to really push high speeds. 5th gear was a mess unless I was already going fast. I could inch up to speed but not twist it hard.

When the noise started, it was right after it started to shake and cut off. The plug wire popped off, I put that back on, started it up just like normal then bang bang bang. I didn't get home until REAL late last night so I'll see what i can do tonight.
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Gearheaderiko
Posted on Tuesday, July 22, 2008 - 11:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The causes on the top of my list that come to mind are primary chain shoe failure or carb boot failure.
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Sking1973
Posted on Thursday, July 24, 2008 - 10:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Swampy: "Wheel bearings!

The clue is they were just replaced 300 miles ago.

Probably over torqued the rear axle nut."


Well, took my bike into have my rear wheel noise checked out. Haven't heard a definite cause yet, but the tech said he thought there might be a bearing actually rolling around inside the wheel. The axle nut appeared to be torqued correctly. We'll see when I hear from them later today.
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Ezblast
Posted on Thursday, July 24, 2008 - 10:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

By the way Kovert - your primary is too tight - that is why the difficulty to get up to higher speeds.
EZ
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Kovert
Posted on Thursday, July 24, 2008 - 06:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I still haven't had a chance to take it out, but I can tell you I really doubt it's too tight. I did the check using the method hear with the idle and to be honest it made zero difference.

I think I'm just too heavy and the hills are really what kill me. : ) It just seems to feel like it bogs if I try to twist the throttle hard. Almost like it's choking..
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Ezblast
Posted on Thursday, July 24, 2008 - 06:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Detonation - adjust your static timming.
EZ
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Swampy
Posted on Thursday, July 24, 2008 - 09:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Kovert,
Trust me, you are not too heavy, I had the Little Kid riding bitch one time, at band camp, and we rode up hills just fine, total combined weight 355, me 175, Little Kid 180+
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Reuel
Posted on Friday, July 25, 2008 - 01:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

After you go WOT, and as you ease up the throttle, does it seem to get more power? If so, it's running lean.
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Gearheaderiko
Posted on Friday, July 25, 2008 - 02:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Key question for me is "Did it ever run okay"? If it did, then what changed?
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Sking1973
Posted on Friday, July 25, 2008 - 09:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The saga continues with my "mystery noise." Went to pick up my bike last evening. The mechanics were sitting outside as I arrived (end of the day) so I had a chance to talk with them about what the problem was. "Well, we completely tore the rearend out of your bike and put it back together, and the noise is gone now. We don't know what it was. I rode it about 15 minutes and it didn't do it once." he says. I was just glad it was gone. So I hopped on it and headed through the parking lot. Sure enough, there it was. Same noise in exactly the same way. So I rode back as they stood there scratching their heads. I left it for the weekend since I will be out of town and unable to ride anyway. Hopefully by Monday they will have figured out what the heck is going on.

More Info: It seems to only do it when a torque is applied to the rear wheel. Give her some gas, let of the clutch, and begin rolling and you hear it. If the wheel is off the ground and you do the same thing it doesn't do it. It doesn't do it while sitting in neutral and revving the engine either like it was a rattling bolt or something.

Gotta love Blast ownership...I do!
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Reuel
Posted on Friday, July 25, 2008 - 03:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is your rear brake caliper bouncing around? Could it be your shift lever? I hear metallic jingling sometimes that goes away when I put my foot on the shifter.
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Ezblast
Posted on Friday, July 25, 2008 - 03:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The brake lever will jiggle around also and make noise if loose.
EZ
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Kovert
Posted on Friday, July 25, 2008 - 04:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I bought the bike, changed all the fluids, and basically I never noticed it until I started commuting where I really have to push it sometimes to merge into traffic. So this may have been this way for a while. The noise never started until recently, but the WOT problem has..

When I twist it hard it'll hesitate and bog down, but if I release and gradually roll the throttle it'll get up to speed, just slowly. Or if I downshift and push it with higher RPM's it'll be alright. It's just that hard quick twist that it doesn't like.

I will be pulling some of the bike apart tonight to make it easier to check it out first thing in the morning.
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Pirte
Posted on Friday, July 25, 2008 - 05:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've tried to scour the forum and the internet on how to replace the rocker gaskets with metal ones but havent found a thing. I've searched through the service manual (granted its for a 2008. Its off of the yahoo group page. That IS the service manual, right? :-P)
I have a 2001 blast that is leaking oil out the wazzoo, has ruined a pair of khakis (lol), and consumes and ungodly amout of oil from where its blowing it off.
What page\section of the manual is the how to to take this thing apart?

(Message edited by ezblast on July 25, 2008)
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Ezblast
Posted on Friday, July 25, 2008 - 06:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Go here -
http://www.badweatherbikers.com/buell/messages/201 64/34972.html?1215827077
EZ
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Swampy
Posted on Friday, July 25, 2008 - 06:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sking1973,
Check to see if the rear wheel bearing is loose in the hub.
Check to see if the noise is coming from the front drive pulley area, maybe transmission output shaft bearings.
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Kovert
Posted on Friday, July 25, 2008 - 06:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Pulled the peg, pulled the bolts for the primary cover, and drained out as much of the fluid as possible. Well running into an issue of actually getting the cover off : ) All 14 bolts removed, shifter, what else am I missing. The manual isn't very clear here. Unless I went by it 5 times scouring that sucker.
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Ezblast
Posted on Friday, July 25, 2008 - 06:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The middle bolt?
EZ
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Kovert
Posted on Friday, July 25, 2008 - 07:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yeah behind the shift lever, that is off. I counted I had them all just to make sure...
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Swampy
Posted on Friday, July 25, 2008 - 08:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Back the primary chain adjuster off?

Also it is mounted on dowels and is firm coming off for about a 1/4 inch.
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Gearheaderiko
Posted on Saturday, July 26, 2008 - 02:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tap with a rubber mallet or plastic hammer. If not available a hunk of 2x4 wood will work. Remember, your just trying to crack it free, not crack it.

Symptoms still indicate tight primary or "Das Boot". Could be both! (or neither): (
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