Chatter on take off from stop.


Information and questions on GL1100 Goldwings (1980-1983)
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dank
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Motorcycle: 1982 gl1100A STD

Chatter on take off from stop.

Postby dank » Mon Sep 07, 2009 10:59 am



I recently bought an 82 GL1100 "as-is" trade in from a local motorsports dealer. It was running, just. I've been working on it daily since I got it, kind of like when I rode a Harley. I got it to the point where the wife and I will take it to breakfast but not out of town. Has anyone experienced a kind of chatter or knocking when starting from a stop. Just as the clutch starts to put load on the engine I hear this rattle or chatter from below. I'm making the assumption that it's probably the clutch plates. Once engaged, there is no sign of slipping. Am I right about this or could it be something else? This is my first shaft drive bike.
PS, these online manuals have made my repairs a whole lot easier. Thanks.



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WingAdmin
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Re: Chatter on take off from stop.

Postby WingAdmin » Mon Sep 07, 2009 3:04 pm

Sounds like what you're talking about is the primary chain rattle, and the 4-cylinder wings are famous for it.

I suspect you're only hearing it at low revs under load (i.e. at first start up, or when in too high a gear going up a hill), almost when the engine is being lugged, correct?

A carburetor sync will go a long way to curing the noise (or at least lessening it). However the main solution is to not lug the engine at low RPM's. It's not a Harley, the torque curve is quite a bit higher up, and it does not like to be lugged at low RPM's. Try starting off at a higher RPM, and you'll notice you don't hear it. If you're hearing it under load (i.e. going up a hill) you're in too high a gear, it's time to downshift.

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dank
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Re: Chatter on take off from stop.

Postby dank » Wed Sep 09, 2009 1:39 am

Higher RPM's did the trick. I have to slip the cluch a little more or I take off like a rocket.

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WingAdmin
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Re: Chatter on take off from stop.

Postby WingAdmin » Wed Sep 09, 2009 6:46 am

Good! You'll notice that a carburetor sync will make it even better - you will be able to get it under load under even lower RPM's without the rattle (plus you'll improve mileage, vibration and engine smoothness).

idjit
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Re: Chatter on take off from stop.

Postby idjit » Sat Mar 20, 2010 6:53 am

Over the log term, is this chatter hard on anything?

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WingAdmin
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Re: Chatter on take off from stop.

Postby WingAdmin » Sat Mar 20, 2010 12:32 pm

idjit wrote:Over the log term, is this chatter hard on anything?


It's hard on your ears. :) Really, that's about it. I suppose technically it could possibly wear the sprockets for the hydrochain, but those things are massive - I've never heard of it happening before.

Jeeper
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Re: Chatter on take off from stop.

Postby Jeeper » Mon Apr 19, 2010 4:39 pm

Once again the value of your site comes through Wingadmin. Having taken my '83 out today for the first time to really run it, I was concerned about this very noise you described. I found out the higher RPMs were the solution but was worried that something was wrong. I feel much better after reading this thread. I'll have to re-read your how-to on sync my carbs and give that a go next.

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blkhot08
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Re: Chatter on take off from stop.

Postby blkhot08 » Sun Apr 25, 2010 6:31 pm

I had the same problem when I bought it Inever rode a goldwing before and thats part of it I think..Once I sync ... the carbs and adjusted the vales it didn't bother as much and the more rpms helped :mrgreen:

robertdawber
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Motorcycle: 1983 GL1100 Interstate

Re: Chatter on take off from stop.

Postby robertdawber » Wed Apr 28, 2010 9:36 pm

One could always turn the radio up louder and drown out the clatter:)
I visited friends in Austin this past week and stopped in at Harbor Freight Tools-got the goods for my carb. synch!

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thrasherg
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Re: Chatter on take off from stop.

Postby thrasherg » Thu Apr 29, 2010 9:53 am

I only have the chatter problem when my wife is on the back. She just won't shut up!! :lol:

Glad to hear we have put your mind at rest.

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blkhot08
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Re: Chatter on take off from stop.

Postby blkhot08 » Thu Apr 29, 2010 12:15 pm

Nows a good time to solve. That problem. Drive along the lake front. Rodes I'll. Bet she don't chatter to much then :lol:

PalmBayChuck
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Re: Chatter on take off from stop.

Postby PalmBayChuck » Mon Jun 07, 2010 1:58 pm

I'm really glad I stumbled upon this thread. My new (old) 82 Goldwing was doing the same as well, and I was worried. I guess there is no need to be!

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danhoeger
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Re: Chatter on take off from stop.

Postby danhoeger » Thu Jul 08, 2010 11:00 am

how loud of a chatter are we talking about?

I'm a new Goldwing owner (1982 GL1100i) and I'm trying to get this bike in as good a running condition as I can. I want to take it for a long trip in about a month.

It is making a loud knocking noise at low RPM and is idling very rough. above 2.5 - 3k RPM it sounds great.

I have rebuilt the carbs, replaced the timing belts (and made sure they were set correctly) and put new plugs in.
I haven't looked at the valves yet, that is what I was going to check next but maybe I need to try to sync the carbs first.

I think the carbs might be out of sync but I'm not sure. Just got a sync tool in the mail so I'll be trying that soon.
Father - 1982 Goldwing 1100 Interstate
Son - 1982 Silverwing 500 Interstate

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blkhot08
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Re: Chatter on take off from stop.

Postby blkhot08 » Thu Jul 08, 2010 11:08 am

After i sync 'd my carb's it ran a lot better with less of the knocking.... i'm new to goldwings also but they do have a engine knock of sorts.. So getting the carb's sync'd would be a great start.... I also have a 2008 yamaha stratoliner and that bike has a engine knock that is just the nature of that v -twin.. so good luck the guys on this site can help you with any questions you have ... good luck again :mrgreen:

dwhite
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Re: Chatter on take off from stop.

Postby dwhite » Thu Jul 08, 2010 12:24 pm

This is the noise I have been trying to describe. How ever my 82I doesn't chatter until it is warmed up. Any idea's.

83gl1100nb
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Re: Chatter on take off from stop.

Postby 83gl1100nb » Fri May 13, 2011 11:58 pm

i have similar situation. just cleaned carbs on an 83 gl1100. going thru the posts here & learning various things to do. i rebuilt the starter with help here & now it starts. it idles very loud & knocking sounding, but smooths out nicely at 2,000 with that nice honda hum sound. do you think valve adjustment would help smooth out idle noise? i have to rebuild the front master cyl & brake rotor in order to take it out on the road. but it sounds so nice at 2,000rpm & up. any thoughts would be appreciate. thank you

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WingAdmin
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Re: Chatter on take off from stop.

Postby WingAdmin » Sat May 14, 2011 8:13 am

83gl1100nb wrote:i have similar situation. just cleaned carbs on an 83 gl1100. going thru the posts here & learning various things to do. i rebuilt the starter with help here & now it starts. it idles very loud & knocking sounding, but smooths out nicely at 2,000 with that nice honda hum sound. do you think valve adjustment would help smooth out idle noise? i have to rebuild the front master cyl & brake rotor in order to take it out on the road. but it sounds so nice at 2,000rpm & up. any thoughts would be appreciate. thank you


Normally the sync chatter happens under load, not at idle. It would have to be very out of sync to chatter like that at idle - either that, or one of the carbs is not operating correctly at idle, meaning the bike is essentially running on 3 (or less!) cylinders at idle.

If you have an infrared thermometer (you can get them for around $20 at Harbor Freight) point it at each of the exhaust downpipes coming from each cylinder when the bike is idling to see what their temperature is - they should all be at about the same temperature. If one of them is much cooler than the rest, then that cylinder is likely not running correctly at idle (idle jet clogged in carb, perhaps).

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tallman21
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Re: Chatter on take off from stop.

Postby tallman21 » Tue May 17, 2011 8:49 pm

once again also glad i found this thread :) i was having the same knock on my bike at low RPMs. Now im glad its not a problem




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