High end clatter


Information and questions on GL1000 Goldwings (1975-1979)
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Reedcutter
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Motorcycle: 1977 GL1000

High end clatter

Postby Reedcutter » Sat Jul 20, 2013 10:50 am



Hi all
Well! I have a GL1000 1977 and I've got her running sweet as a nut. Only problem is that I have a sharp quick clatter when I'm peaking through every gear?? It sounds like its coming from my carbs rather than the block area. Does anyone have a clue what this could be?
I don't seem to be able to get it to make the noise when out of gear and standing.only seems to do it under load?? I have balanced the carbs and they are all fine. Could this be the slides in the carbs going crazy for some reason? Thanks in advance for any input to this post.



bustedwing
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Re: High end clatter

Postby bustedwing » Sat Jul 20, 2013 3:55 pm

It sounds like it's coming from the throat of the carbs? Is that only on upshiftig but not downshifting? Is there a certain RPM? At the moment all I can say to try, if you haven't already, is take a compression test to see if all of the cylinders are close to the same. To do it right take a dry then wet test, marking your findings down so when you are done you can compare them.
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Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Jul 21, 2013 12:55 am

It's only happening when the engine is at the top of rev range while under load . I will do a compression test today and see what I'm up against. All my vacuums seemed fine and the same as each other on the sync . Il post me findings a bit later on thanks .

Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Jul 21, 2013 1:04 am

Sorry, I've just read your message again. What's difference between a wet and a dry test? All I have is a push on and twist compression tester. Is dry with throttle shut? And wet with it open?

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themainviking
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Re: High end clatter

Postby themainviking » Sun Jul 21, 2013 5:07 am

No, dry is the way the bike is now, and wet is with a squirt of oil in the cylinder.
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Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Jul 21, 2013 7:40 am

Thanks il try that. I found a guy who had posted how both are done and I will get round to doing these tests today.

Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Jul 21, 2013 9:00 am

I've just done the tests. All cylinders read 150psi and wet test is 165psi I'm guessing that's ok as they all the same give or take 1 psi . I've narrowed that noise to either #1 or #3 carb area. As I rode down a quiet road bobbin me head down each side for a listen. Could it be an air jet blocked? Or wouldn't it run at all then? Cheers.

bustedwing
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Re: High end clatter

Postby bustedwing » Sun Jul 21, 2013 11:51 am

The compression tests show your valves and rings are in great shape. So the problem is not in the top of the internal engine. So that narrows it down to one of the carbs . One thing you might try before pulling a carb apart is run some carb cleaner thru the fuel. There are several different kinds and it's worth a try beforehaving to tear into it. The carbs do get small areas plugged after sitting any time, especially if the fuel hasn't been treated before shutdown. Keep in mind while the cleaner is going thru the engine will not run any better as the gunk is still going thru the engine, so it may take a few tanks of clean fuel before you know if it worked or not. Good luck.
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Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Jul 21, 2013 12:06 pm

Thanks very much for your thoughts and advice. I've been and bought an in fuel mixer designed for carb and injector cleaning. It's called Red X . Il try a couple of tanks with that mixed in and then few tanks of fresh and see where we are then. Will be back on here once this has been done and let you know how it has gone. Cheers.

bustedwing
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Re: High end clatter

Postby bustedwing » Sun Jul 21, 2013 12:13 pm

I am always glad to try to help. I know sometimes we may ask some seemingly weird questions but it'shhard for us to get the feel of what is wrong when we are so far apart. Thanx for your tolerance and understanding.
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spookytooth
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Re: High end clatter

Postby spookytooth » Thu Jul 25, 2013 1:49 pm

When was the last time the valves were adjusted?

Reedcutter
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Re: High end clatter

Postby Reedcutter » Thu Jul 25, 2013 2:24 pm

Hi
I checked all valves and they are all set ok. I didn't need any adjustment this time. I've not had a chance to go for a ride since my last post due to the pants weather we are getting at moment. Meant to be sunny at weekend though so il go for it then . Thanks.

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Placerville
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Re: High end clatter

Postby Placerville » Thu Jul 25, 2013 4:33 pm

I re-read your first post and suggest that the 'sharp quick clatter when peaking through every gear' is perhaps a 'resonate' sound rather than a 'suck, bang & blow' related problem. You said it happens briefly at high RPM. Could it be that a vibration of, say, the air box (or some other part) is occurring briefly at higher RPM's? When riding the bike, take note of the RPM range that this sound is occurring. Then, with the bike on the center stand, run it up to that level several times and see if you can get the sound to repeat itself. If you can, you might be able to isolate it.
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Reedcutter
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Re: High end clatter

Postby Reedcutter » Thu Jul 25, 2013 4:39 pm

I've already tried it standing and reving it. It only seems to be while its under load . When sitting , it's fine. Can rev it up lovely. Just when in gear and moving. A real puzzler hey?

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spookytooth
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Re: High end clatter

Postby spookytooth » Thu Jul 25, 2013 10:59 pm

I had something similar to this happen to me last week.. During deceleration (downshifting, coasting) I could hear a quite loud and worrisome rattle. It turned out to be the headlight ring..

Reedcutter
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Re: High end clatter

Postby Reedcutter » Fri Jul 26, 2013 1:57 am

Ha! Ha! I wish it was just that. But I have a twin headlight on it and its all tight. I'm hoping the in fuel carb cleaner idea will solve my problem. Fingers crossed! And all that!

dwight007fchr
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Re: High end clatter

Postby dwight007fchr » Mon Jul 29, 2013 9:27 pm

You sure you didnt have a stray ferrel cat leave some kittens in your airbox?

This weekend I was successful in resolving my carb problem by just squirting a **** of carb cleaner spray into the right and left lower sides of the intake box while reving the engine up and down. (Remove air filter and then spray down into that intake box, aiming for the screen wire on one side, and then the other side). I would have her running at say 3000 rpms and let the spray rip, and put so much in that she would come close to stalling out. That really helped my "gummy" carbs.

Reedcutter
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Re: High end clatter

Postby Reedcutter » Tue Jul 30, 2013 1:43 am

Thanks for that. If the cleaner in petrol don't sort her out. Il try the cleaner in the plenum through the screens. Cheers.

dwight007fchr
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Re: High end clatter

Postby dwight007fchr » Tue Jul 30, 2013 6:51 am

demickeys........You will definately have "high-end clatter" if you let your wife ride on the back of your Wing wearing one of these dresses.

Reedcutter
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Re: High end clatter

Postby Reedcutter » Sat Aug 03, 2013 11:41 am

Hi all
Just wanted to say thank you for all your suggestions. The in fuel additive/carb cleaner,Red X has solved my clattering. I've been out and up to the coast today( about 45miles) and she didn't clatter once. Throttle response is awesome!! So much power! I had only run half a tank with additive in it . But due to bad weather, I had to stand her up for about 2weeks. I'm thinkin this must really have let the cleaner eat in to the gunk in my carbs. Only problem now is that I'm having to pick bugs out of my teeth now due to all the grinning I'm doing as she pulls away from lights and junctions.
Cheers guys

bustedwing
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Re: High end clatter

Postby bustedwing » Sat Aug 03, 2013 7:26 pm

Very glad you were able to solve it without having to dismantle anything. Now just run some thru once in awhile, treat your fuel before you store the bike for the winter, and you will have less problems with carbs and clogged ports. Ride safe.
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Reedcutter
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Re: High end clatter

Postby Reedcutter » Sun Aug 04, 2013 6:33 am

That's good advice bustedwing. Il make sure I run some additive through it before I stand her for the winter. Don't want to spend half my summer cleaning and moaning like have done this year.
Thanks for that.
Ride safe mate




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