springer noise

Information on forks/springers/shocks
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plattd
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springer noise

#1

Post by plattd » Sat Jun 13, 2009 4:42 pm

Back again for some shared wisdom. This panchop has a springer front end, not sure what make; it's my first bike with spring forks, so I'm unfamiliar with what to expect. When I get up in the rpm range, say around 3000, I hear a ringing noise that at first I thought was coming from the rocker covers, but then as I was feeling around I put my gloved hand over the top of the springs and the noise damped right down. So is this the standard song of a spring fork, or is there some adjustment/lube thing I need to attend to? Thanks.

David



NightShift
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Re: springer noise

#2

Post by NightShift » Sat Jun 13, 2009 7:25 pm

Dear Plattd.

Most springers have two rods that stick through the springs with nuts on top, and they pre load the springs so they don't shake or sing.

See what tightening them does.

Nightshift.

Ohio-Rider
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Re: springer noise

#3

Post by Ohio-Rider » Sun Jun 14, 2009 2:44 pm

Put the bike up on a jack with the weight off of the wheel, then check for broken or loose inner springs. Springers don't normally back much noise other than an ocassional squeek when needing greesed.

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Re: springer noise

#4

Post by FlatHeadSix » Sun Jun 14, 2009 3:41 pm

David,
its hard to diagnose your problem without seeing the fork you have on the bike. A factory springer has 8 springs, 4 on top and 4 on the bottom. The inner springs should have a bow or arc in them which keeps them pressed against the inside of the outer springs and tight on the rod to prevent them from making noise. A lot of the replacement springs installed on choppers (usually chrome) are straight, the inner springs will be loose and rattle. Are your inner springs loose?, can you spin them or slide them up and down a little inside the outer spring?

just a thought, post a picture.....

mike

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Re: springer noise

#5

Post by Ohio-Rider » Sun Jun 14, 2009 4:55 pm

At 3k rpm a lot of things could be rattling up there. I've had headlight collars rattle so bad it could drive you crazy. Same with a loose horn bracket.

plattd
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Re: springer noise

#6

Post by plattd » Thu Jun 18, 2009 8:22 pm

Can't be sure, but I think these are Paughco's 9inch wide forks. They still sing a bit after tightening. Maybe I'll try another few flats on the nuts. The inner springs on top are straight, not much room for bend as they are only slightly bigger around than the rod. The lower inner springs are larger diameter and maybe bowed a bit. They are also slightly rusty. Any recommendations on lubing these springs?
David

NightShift
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Re: springer noise

#7

Post by NightShift » Thu Jun 18, 2009 8:46 pm

Paughco's are sturdy, but you gotta massage them like a, well lets not go there.

One trick with a custom is to punch big thick washers out of hard rubber like a truck mudflap and make dampeners out of them. One on each spring rod aughta be enough.

NightShift
And oh yeah, if that Paughco springer doesnt have fender tabs, dont' try to put a fender on it.

108
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Re: springer noise

#8

Post by 108 » Thu Jun 18, 2009 9:50 pm

My extended stock springer with only single lower springs(because of added rake) used to vibrate so bad at about 60 mph I could hear it even with a helmet and fairly loud pipes. I stopped it by sliding an upper shock rubber bushing from a car down the rod which happened to be a snug fit inside the coils.

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Re: springer noise

#9

Post by NightShift » Thu Jun 18, 2009 11:41 pm

We should call rubber bumpers "snubbers'.

Ain't my invention, I swear.

NightShift
.

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