steering dampener

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PanPal
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steering dampener

#1

Post by PanPal » Tue Nov 01, 2011 6:04 pm

I aquired several pieces of the steering dampener set up this weekend. I think I am missing a coil type spring and can't find a drawing of the complete assembly. Also if I am missing the spring, does anyone have dimensions?



Robert Luland
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Re: steering dampener

#2

Post by Robert Luland » Tue Nov 01, 2011 8:23 pm

Which damper? Springer, Glide, WLA?

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Re: steering dampener

#3

Post by panhead » Tue Nov 01, 2011 8:23 pm

Is this what you are looking for?
frontfork.jpg
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Re: steering dampener

#4

Post by PanPal » Tue Nov 01, 2011 8:43 pm

Robert, it is for the glide. and I saw your JD motor up at Steve's over ther weekend.

That's the One Panhead! Thanks

The dimensions I was looking for are spring #79 in the drawing

Now, I just read an older post and found I may not want to install it on a 59. Apparently Duo's had a high speed wobble problem with Dampeners tightened down.

I've taken a lot of time making sure the front and rear wheels are in line and made sure my rims were trued up. At 65 MPH and up I get almost a Gyro feeling with the bike, not bad but enough it feels a little uncomfortable. I guess the next step is some wheel balancing. I'm running the newer style Dunlops until I wear them out. I've played with tire pressures with no luck.

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Re: steering dampener

#5

Post by RUBONE » Tue Nov 01, 2011 9:10 pm

If you are getting that "gyro effect" as you call it check your swingarm bearing pre-load and your neck bearing adjustments. Too tight in either of those can cause what you are describing! Too loose tends to produce a wallowing feeling.
Robbie

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Re: steering dampener

#6

Post by PanPal » Tue Nov 01, 2011 9:36 pm

Could be I'm explaining the feeling wrong. Swing arm bearings and shaft are good to go. I may have the neck a little loose but there is no clunking or give noticed rocking it forward and backwards with the front brake pulled. The neck is not tight.

If I take my hands off the bars even at slower speeds. The bars start to shake a bit left to right. I think this is what I feel more at 65 MPH.

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Re: steering dampener

#7

Post by john HD » Tue Nov 01, 2011 10:29 pm

loose parts in your seat T assembly can give you a weird ride.

john

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Re: steering dampener

#8

Post by PanPal » Tue Nov 01, 2011 11:21 pm

John,

Good point as this was very bad last year. Very wierd ride for sure. I repaired this last year with a new bolt and machining a new bushing for the front of the seat Tee. It is very nice now.

I will reset the load on my neck bearings to see what happens there. Mainly because this is what I was trying to get accomplished with the dampener to begin with.

Can most shops balance star hub wheels with weights? Are the balancing beads any better?

Going back to trueing my wheels about 3 years ago..... We painted and rebuilt the star hubs and I was changing over to some chrome rims at the same time. One rim was a later HD rim which was very true and appeared to be triple chromed but it had DOT stamped in it. The Other was a reproduction rim that appeared to have a hump where it was welded together during manufacturing and you could see sanding marks through the chrome. The HD rim trued perfectly but there was one spot on the aftermaket wheel with a little bump. it was a very small hump and my buddy said I would never feel it once the tire was mounted. I believe the wheel with the better Chrome is mounted on the front because you can see more of it. So is it probable I am seeing this handle bar wiggle with this wheel on the rear? The original black (painted over bad chrome) rims I removed did the same thing.

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Re: steering dampener

#9

Post by Johnno » Wed Nov 02, 2011 12:04 am

PanPal
Try a dial gauge on your front rim (felt marker pen will do) but I would be having a good look at the tire for correct installation or faulty (lump, separation,balance) jack it up & spin it by hand. Ive had similar feel when shops haven't fitted a tire correctly on bead, fitted my own for years now. I would rule out alignment as that should only push it left or right & not create a wobble.Hope this helps. Cheers Johnno (down under)

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Re: steering dampener

#10

Post by Robert Luland » Wed Nov 02, 2011 12:45 am

I've seen just about anything you can think of over the years that can cause a weird feeling riding. All my wheels are balanced and weighted. I hate the way the weight looks on the bike but it does make a difference in the feel on the road. As Rob stated. The swing arm preload is a big deal but people get lazy and slap it together. I mean, how much time does it take to hook a fishing scale to something? I had one buddy come by the shop in 94 complaining about a fishtailing feeling. The first thing to hit my head was swing arm or wheel bearings. Threw on the air lift only to find his rear spokes were so loose, you could move the rim back and forth one inch plus. I don't know how he even got there without the wheel collapsing. The other thing that I see a lot is that star bearing nut under the top triple tree loosing up. I got a cure for this. When you look at the top triple tree you will see three 1/4" holes that are in front of the main hole. They are already drilled for a 1/4 in tap at the factory. I tap all three. After the top triple tree is bolted down, I screw in a set screw in the hole that lines up with a star indentation on the bearing nut below it and lock it. I always felt that this was the factories intent. Bob L

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Re: steering dampener

#11

Post by PanPal » Wed Nov 02, 2011 3:54 pm

Robert and Johnno, Thanks for the replies. I'll go back and check out the rims, tires, neck and swing arm again.

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Re: steering dampener

#12

Post by RUBONE » Wed Nov 02, 2011 11:26 pm

While you are checking, look at your lower triple tree and see if it is the correct one for a swingarm bike or if it is a rigid style. It will affect the rake slightly.
Robbie

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Re: steering dampener

#13

Post by old1955 » Fri Nov 04, 2011 10:31 am

G'day PanPal

I found a push rod tube spring, fits nicely on the damper screw shaft.
Hope it works out for you!

Pete

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Re: steering dampener

#14

Post by PanPal » Fri Nov 04, 2011 4:20 pm

Pete
That will work! Even if I don't install it I do want to collect everything I need for the set up.

Robbie,
How can I tell if I have a swingarm lower tree. Part Number??? Where did they stamp the part number or would casting numbers do?

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Re: steering dampener

#15

Post by RUBONE » Sat Nov 05, 2011 2:22 am

Look underneath it at how the stem is welded in. If it is offset in a raised oval boss it is swingarm. If it is centered in a round boss it is rigid.
Robbie

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