Progressive Fork Spring Noise
Seasoned HDF Member
Joined: Aug 2006
Posts: 24,418
Likes: 30,641
From: Pennsylvania
RE: Progressive Fork Spring Noise
Look at the floating front wheel disk (I am pretty sure your model has that too), my 2006 Dyna Clunks and it is the floating disk hitting the stops on the hub. Just watch youe wheel and disk when you do that, you will see the wheel move slightly and the disk stay put. Hope this helps
-The Breeze
-The Breeze
Road Warrior
Joined: Nov 2007
Posts: 1,641
Likes: 4
From: south of Boston
RE: Progressive Fork Spring Noise
SeeNoSun, I just got back from a quick whip.... man, it felt good after 5 months....anyway, i got an initial "clunk" when i first braked.... and that was it....now, that could have been from the simple fact that the bike had been sitting with the new setup for nearly 4 months and hadn't had any dampening occur....i don't know...but i was diving it and everything, afterward, and nothing.... seemed very smooth....and really a difference in ride
you know, i suspect if you didn't bleed the air out, things aren't going to dampen properly
you know, i suspect if you didn't bleed the air out, things aren't going to dampen properly
Outstanding HDF Member
Joined: Jun 2007
Posts: 3,306
Likes: 5
From: Bellville, Tx
RE: Progressive Fork Spring Noise
I get that clunk when it tops out if my oil level is too low. I don't know what effect the progressive springs have but they may require heavier oil for proper damping.
Road Master
Joined: Aug 2007
Posts: 1,069
Likes: 0
From: Western MA
RE: Progressive Fork Spring Noise
ORIGINAL: SeeNoSun
I did not bleed out the air and have not cut the spacer. I will try those two things.
Thanks.
I did not bleed out the air and have not cut the spacer. I will try those two things.
Thanks.
Thread Starter
|
Tourer
Joined: Dec 2007
Posts: 437
Likes: 0
RE: Progressive Fork Spring Noise
how do you bleed the air out?
Took it by the dealer today. I travel an hour to get to a good one that I trust. They feel the thunk too when sitting still and rocking back and forth. They test rode the bike and don't feel it while riding (neither do I). They said the bike handles really well (I agree). They said since it handles well it should be safe. They would be happy to tear it down and rebuild it but they said that will take about 4 hours of labor.
I have a couple of options:
1) Adjust the Pre load/SAG by cutting the Spacer. I weigh 175 and it does feel a little stiff. I'm reluctant to change this because it does handle so well.
2) It could have too much or too little oil. My guess is too much is a possibility. I was told by a tech at Progressive that these Springs displace more oil than stock springs. I did not drain the oil ...just replaced the springs and spacer. I had an Indy tech help and he measure the oil at 5.5 inches but I don't remember if the fork was compressed when we did the measurement.
3) Do nothing.
Thanks for all the ideas. I appreciate the help.
Took it by the dealer today. I travel an hour to get to a good one that I trust. They feel the thunk too when sitting still and rocking back and forth. They test rode the bike and don't feel it while riding (neither do I). They said the bike handles really well (I agree). They said since it handles well it should be safe. They would be happy to tear it down and rebuild it but they said that will take about 4 hours of labor.
I have a couple of options:
1) Adjust the Pre load/SAG by cutting the Spacer. I weigh 175 and it does feel a little stiff. I'm reluctant to change this because it does handle so well.
2) It could have too much or too little oil. My guess is too much is a possibility. I was told by a tech at Progressive that these Springs displace more oil than stock springs. I did not drain the oil ...just replaced the springs and spacer. I had an Indy tech help and he measure the oil at 5.5 inches but I don't remember if the fork was compressed when we did the measurement.
3) Do nothing.
Thanks for all the ideas. I appreciate the help.
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,223
From: the 50s & the 60s
RE: Progressive Fork Spring Noise
ORIGINAL: SeeNoSun
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
Sun, here's a little info
mud
Tourer
Joined: Dec 2007
Posts: 286
Likes: 0
From: Santa Rosa, Ca
RE: Progressive Fork Spring Noise
I just got off the phone with Progressive tech support. I discussed your situation as I'm about ready to buy a set of springs myself and wanted to prevent the same situation. My weight is at 180. The PVC that comes with the kit is longer than required and designed to be cut to give you the proper sag. The tech said, with weight off thefront endand the fork cap off, the spacer should stick out approximately 1/4". Once the cap is screwed in you should have a decent pre load on the spring for your/my weight. I asked about the clunking noise and he said it's either a damaged damping rod (not likely in your case) or there's too much pre load on the spring. From my own personal experience having set up dozens of street bikes you're looking for approximately 1 1/2" of SAG. The link I posted earlier explains SAG.
I hope this helps,
Ron
I hope this helps,
Ron
Road Master
Joined: Aug 2007
Posts: 1,069
Likes: 0
From: Western MA
RE: Progressive Fork Spring Noise
ORIGINAL: mudpuddle
Sun, here's a little info
mud
ORIGINAL: SeeNoSun
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
Sun, here's a little info
mud
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Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,223
From: the 50s & the 60s
RE: Progressive Fork Spring Noise
ORIGINAL: Muddyape
Mud, I certainly have NO business questioning you BUT.....I noticed you posted that page before and I think its wrong. The numbers are inverted, I have an 07 Service manual and the amounts are just the opposite which makes more sense to me as the WG has longer tubes therefore should require more fluid. When I added 26.6 oz to my SB lowers the measurement was just about perfect. I think it was a glitch for that manual.
ORIGINAL: mudpuddle
Sun, here's a little info
mud
ORIGINAL: SeeNoSun
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
how do you bleed the air out?
**********************************
2) It could have too much or too little oil. My guess is too much is a possibility.
I was told by a tech at Progressive that these Springs displace more oil than stock springs.
I did not drain the oil ...just replaced the springs and spacer.
I had an Indy tech help
and he measure the oil at 5.5 inches
but I don't remember if the fork was compressed when we did the measurement.
Sun, here's a little info
mud
So, I wonder what the policy from the MoCo is on manual revisions??
If mine is wrong, why is HD not issuing alerts on this??
(even though the difference is only 1/10 of an inch)
Please scan this part of your manual, so I can edit my previous postings.
mud
Road Master
Joined: Aug 2007
Posts: 1,069
Likes: 0
From: Western MA
RE: Progressive Fork Spring Noise
Mud, if my fluid dynamics is still up to snuff 
, the 3 oz's of extra fluid probably translates to the WG legs being about 1.75" longer than the other Dyna's. Because the fluid level measurement is from the top ofthe tube collapsed. If thats the case then I agree with why there wouldnt be a problem with guys who put it in to the specs (incorrect) outlined in 06 manual.
, the 3 oz's of extra fluid probably translates to the WG legs being about 1.75" longer than the other Dyna's. Because the fluid level measurement is from the top ofthe tube collapsed. If thats the case then I agree with why there wouldnt be a problem with guys who put it in to the specs (incorrect) outlined in 06 manual.