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Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders Discuss Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders problems, advice, and/or how tos.

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  #1  
Old 15th July 2007
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Default Nightster fork sag, solution?

( Moved from Nightster section )

I am experiencing ,what I consider, serious fork sag. At least 1" when just sitting on the bike and almost complete compression under breaking leaving very little suspension over bumps. It wouldn't be so bad except that this bike has very little travel to begin with and I only have 300 mi on this bike, what happens after several thousand? I have not had this problem with any of my other bikes, but they were not HD.

I have read several posts on this subject, but I have not come across a specific solution in detail on why and a how to truly fix this problem. I want to put some 11.5 or 12" progressive shocks on the rear but I need to remedy this first.

The dealer seems to think this sag is normal, I do not! At least the tech I spoke to admitted that he was not completely familiar with the suspension particulars on this particular bike since it is new and will call HD tech support and inquire about it. Do the Ls have the same suspension?

Any suggestions on how to approach the dealer on this and get them to fix it? I have to say, I am extremely disappointed with the front suspension at this point, I hope there is a reasonable fix. I just don't think I should have to be the one to shell out $$$$ to fix a brand new bike.

I would like to try to figure out why the stock set up is so wrong?

Thanks, CB
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  #2  
Old 16th July 2007
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Sportster suspension is notoriously bad, so your disappointment is pretty typical. Unfortunately, it is acceptable as far as HD is concerned, so they won't likely fix it for you.

I suggest progressive fork springs and heavier oil, maybe 20w Bel Ray fork oil - that should help out alot. I have the standard height XL and progressive springs and 15w Bel Ray and it still sags a bit, so I'm going to put 20w in when I get a chance to see if that helps.
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  #3  
Old 16th July 2007
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Good luck, as H-D is notorious for crappy suspension, as there bikes come with no adjustments for pre-load or compression settings to properly set the suspension correctly without going to progressive springs and heavier oil, although i prefer i stiffer ride even the 20 weight oil is still to soft, but hey that's just me!!!
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  #4  
Old 16th July 2007
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I like the results I got from Works performance. I called them up told them bike model, my weight and how I rode. The fork springs they sent worked great. The cost was approx $120. Getting the springs right is the best thing you can do.
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  #5  
Old 16th July 2007
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Quote:
Originally Posted by royt View Post
I like the results I got from Works performance. I called them up told them bike model, my weight and how I rode. The fork springs they sent worked great. The cost was approx $120. Getting the springs right is the best thing you can do.
I use Worksperf. for my sport quads, always been happy with their products to cost compare to others. I will give them a call for my HD, thanks.
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  #6  
Old 16th July 2007
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The cheap fix would be to try heavier oil, but I don't think you will be happy with that. One of the best things you can do for your bike is ditch the stock suspension and go with a better aftermarket setup. You'll enjoy riding your bike more.
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  #7  
Old 16th July 2007
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Progressive springs and 15 wt bel ray oil.

But, they only make them for Sportsters, not sure if you can find them for nightsters.
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  #8  
Old 16th July 2007
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Another cheap fix would be to put a short piece of pvc on top of the spring to give you more preload but it will probably also make the suspension tighter and less forgiving. A cheap but more radical fix would be to add valves to your fork caps and convert them into air shocks. One of the members has a thread going about that.

My suggestion would be replace the springs with something after market like Progressive. I've bottomed out my Custom forks a few times and it ain't pretty.
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Old 16th July 2007
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Start with the Screamin' Eagle fork oil, which is available in two weights. You can always do the springs from www.progressivesuspension.com if you are not satisfied with the fork oil change only.
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  #10  
Old 16th July 2007
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Ill speak for the "LOW" crowd...

I weigh 250 and it sags pretty bad just sitting on it. It bottoms out pretty often on the bigger bumps. When I get the chance I'm thinking about progressive spring/ 20wt oil route. It should keep the low stance and really help out the cornering / sag issues.
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