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Discussion Starter #1
I know this is like asking to fix the squeek that only happens over 30mph when the left wheel goes over a bump.........:nonono:......but here goes :flowers:



Three times now I've experienced this, but can't figure out yet what this problem could be.


First time I'm decelerating from 55 fairly slowly and suddenly there's a 'reedy' sound, reminds me of when some straw got stuck between my bicycle wheel and fender as a kid. There's too much going on (gotta turn across traffic into a lot with cars & people) for me to pay much attention and by the time I've stopped, so has the sound. The ride back home was quiet.


2-3 days later, I'm going much slower, around 30mph decelerating and it just starts, then stops 10-20 seconds later.


4-5 days after that, at the same place as the first, although this time I have the opportunity to tap the rear then front brake, no difference, then I begin to pull in the clutch and the noise suddenly stops. I don't think I got the clutch fully squeezed shut either.


It's hard to hear above the noise of the wind, I can't tell if it's front/back/left or right. There's no associated vibration with the noise, acceleration is good, bike has been up to 75mph, climbs up hills nicely.



Changed oil about 150mi ago, 10w40 castrol. Chain lubed/adjusted maybe 200,300mi ago. Clutch cable adjusted. Shifts easily up/down/neutral.



Since I got this bike it does have one weird clutch characteristic I've never felt before. When pulling away very slowly in 1st, once the bike is moving and the clutch reaches the end of the friction zone, it seems to jump the last 10-20% meaning it just goes from slipping slightly to fully engaged.


Any ideas welcome.
 

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You may have determined the source of the noise by pulling the clutch lever when you hear it. How many miles on that clutch? What's the ownership history of the bike?
 

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I forget exactly, but isn't Castrol 10W-40 one of the oils not recommended for our clutches?
 

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I can't remember, somewhere in there at around 10W-40, or 10W-30, or so it breaks out into the new Energy Conserving oil. The Energy Conserving oil is (from what I remember) what is NOT recommended to use in our wet clutches. I'm sure a search could be done on here to see the threads that better explain it. Either way, I'm not trying to tell anyone what to do. If it is not the Energy Conserving oil, it is good oil (well, let me be more accurate, it is great oil either way). Castrol traditional is all I use in my cars (with one exception).
 

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Discussion Starter #6 (Edited)
You may have determined the source of the noise by pulling the clutch lever when you hear it. How many miles on that clutch? What's the ownership history of the bike?
I didn't buy this from the original owner, but from his friend who got it running for him and sold it.
The story is the bike was purchased for the wife, rode it, got divorced, he garaged it. Tires were 10yr old when I got my hands on it, but no flat spots, so it was stored decently, asides from not draining the carb, from what I can tell.
I'd guess the owner was 25-35 when this bike was purchased.
I got it with 3800 on the clock, it now has 6250. This oil is same as the last change.


EDIT: Yesterday I noticed the oil smelled slightly of gas, possibly indicating an over rich condition (my daily commute is 5 minutes). Considering my choke cable was compromised, I'm wondering if my last carb setup was thrown off. I'll re-do that today.
 

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Discussion Starter #7
I have not had a chance to readjust the carb, but no noises since my last 50+mi run.
 

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Discussion Starter #8 (Edited)
And today it's back, neither brakes nor clutch made a difference, changed down a couple of gears before it stopped. Sped up sound came back, didn't go away until I slowed back down (30/20 mph). Sounded like a strangled weasel.

I doesn't seem related to engine revs.


Any idea what it sounds like if the starter is engaged while at speed?
 

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Discussion Starter #9
Found it! A critter had eaten a hole through my left saddlebag. A candy bar was poking out, almost touching the rear sprocket :nonono:.


That would be the reedy/strangulated creature noise I'm hearing, when it just touches I guess.


Well those hard bags just became much more important :rolleyes:
 

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Glad you figured it out!
 
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