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 Shimming fork springs

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steveR
Maxi-Scooter Rider
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PostSubject: Shimming fork springs   Wed Apr 13, 2011 9:23 am

I have asked this in the England forum also, but thought this may get a wider readership! Smile

I am looking to firm up the front forks and will use a heavier weight oil when I rebuild the forks, however while putting some new springs would be a nice option, it is not cheap.

Has anyone tried increasing the preload on the Swing springs by using shims/washers on top of the spring and found it worked? I have done this in the past on bikes and found it can often be useful.
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Cosmic_Jumper
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PostSubject: Pennytech Hyperpros   Wed Apr 13, 2011 9:45 am

Dunno about using heavier weight fork oil, but, in the past, there were several discussions on the Yahoo Silverwing Forum about adding a 10 mm piece of PVC pipe to increase the length of the SW spring spacer and increase the pre-load that way.

Tim
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C-Wing
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PostSubject: Re: Shimming fork springs   Wed Apr 13, 2011 10:43 am

I did this on a Sportster I used to own and it worked pretty well.
It wouldn't cost much other then your time.

C-Wing
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steveR
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PostSubject: Re: Shimming fork springs   Wed Apr 13, 2011 10:52 am

Thanks Guys, I will see what i have in the washer box tomorrow morning and go from there. It cannot hurt to try 8-10mm and it'll never be easier!
! Smile
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Bernardo
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PostSubject: Re: Shimming fork springs   Wed Apr 13, 2011 1:00 pm

Well its definitely worth a try and should help with a firmer ride, but ultimately will not be as good as the hyperpro springs as they are progressive as opposed to linear... where u really will notice the difference is in the handling, progressive springs will give a tauter ride and the scoot will be more stable and quicker at stopping in a hurry
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steveR
Maxi-Scooter Rider
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Number of posts: 175
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PostSubject: Re: Shimming fork springs   Wed Apr 13, 2011 3:00 pm

Bernardo wrote:
Well its definitely worth a try and should help with a firmer ride, but ultimately will not be as good as the hyperpro springs as they are progressive as opposed to linear... where u really will notice the difference is in the handling, progressive springs will give a tauter ride and the scoot will be more stable and quicker at stopping in a hurry


Not sure what make spring is in the forks, but they are pukka progressive springs already! I think that someone may have been in the forks before, as there was a mark on the one leg on the retaining plug.
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Bernardo
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PostSubject: Re: Shimming fork springs   Wed Apr 13, 2011 5:33 pm

steveR wrote:
Bernardo wrote:
Well its definitely worth a try and should help with a firmer ride, but ultimately will not be as good as the hyperpro springs as they are progressive as opposed to linear... where u really will notice the difference is in the handling, progressive springs will give a tauter ride and the scoot will be more stable and quicker at stopping in a hurry


Not sure what make spring is in the forks, but they are pukka progressive springs already! I think that someone may have been in the forks before, as there was a mark on the one leg on the retaining plug.


Looks like you are onto a winner..!
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steveR
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PostSubject: Re: Shimming fork springs   Thu Apr 14, 2011 12:58 am

Bernardo wrote:


Looks like you are onto a winner..!


It'd be nice to think so Smile
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walmac
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PostSubject: Re: Shimming fork springs   Thu Apr 14, 2011 6:33 am

Hi Steve,in the standard Honda set up the fork springs have a large distance piece fitted,approx 60mm in length.When the Hyperpros are fitted this distance piece is left out as the springs are much longer than the standard fitted.So if you have no distance piece in your fork set up then it looks like some previous owner has upgraded the forks.

Looking good.

Wal. Smile
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steveR
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PostSubject: Re: Shimming fork springs   Thu Apr 14, 2011 7:38 am

walmac wrote:
Hi Steve,in the standard Honda set up the fork springs have a large distance piece fitted,approx 60mm in length.When the Hyperpros are fitted this distance piece is left out as the springs are much longer than the standard fitted.So if you have no distance piece in your fork set up then it looks like some previous owner has upgraded the forks.

Looking good.

Wal. Smile


Much obliged Wal, the long spacer was still in the fork. I know what you mean about the longer springs, as I have fitted Hagon springs on my bikes in the past too.
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C-Wing
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PostSubject: Re: Shimming fork springs   Tue May 17, 2011 10:30 am

This thread got me to thinking about shimming the forks so I did.

The original spacer is about 2 3/8 of an inch. I made spacers out of 3/4 inch schedule 40 PVC pipe. I made them 3 3/8 inchs long.

The first thing I notice is that the front doesn't sag near as much. Almost half my travel was taken up by just standing the Wing up. Now I loose about an inch which is almost perfect for sag.

Now the front is stiffer but not harsh. I will have to give is some time to get used to it and to give a better report. Total cost was .53 cents for the pipe and a couple hours of my time.

C-Wing.
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pancho
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PostSubject: Re: Shimming fork springs   Tue May 17, 2011 2:58 pm

What weight oil did you use?????
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C-Wing
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PostSubject: Re: Shimming fork springs   Wed May 18, 2011 10:08 am

pancho wrote:
What weight oil did you use?????


I didn't change the fork oil, although i probably should have. I pulled the stock spacers and installed my longer spacers then bolted it all back together.

In the small amout of in-town riding I have done, I am happy with the results.

C-Wing
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pancho
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PostSubject: Re: Shimming fork springs   Wed May 18, 2011 4:09 pm

C-Wing wrote:
pancho wrote:
What weight oil did you use?????


I didn't change the fork oil, although i probably should have. I pulled the stock spacers and installed my longer spacers then bolted it all back together.

In the small amout of in-town riding I have done, I am happy with the results.

C-Wing


Thank You,guess what I will do soon.......
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pancho
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Number of posts: 219
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PostSubject: Re: Shimming fork springs   Sat May 21, 2011 10:37 am

C-Wing wrote:
pancho wrote:
What weight oil did you use?????


I didn't change the fork oil, although i probably should have. I pulled the stock spacers and installed my longer spacers then bolted it all back together.

In the small amout of in-town riding I have done, I am happy with the results.

C-Wing


It rides great........Thank you.........
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C-Wing
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Age: 45
Location: Topeka, Ks
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Registration date: 2011-04-07

PostSubject: Re: Shimming fork springs   Mon May 23, 2011 10:29 am

Mine seems to ride better, it doesn't bottom out and it corners much better. I am having to retrain myself to ride with the springs shimmed.

I would recommend this as an inexpensive upgrade. Cool

C-Wing
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DennisB
Silver Wing Guru
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Number of posts: 2397
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PostSubject: Re: Shimming fork springs   Mon May 23, 2011 11:03 am

This was a enteresting thread. Alot of great information. Thank's to all that contributed to it. sunny
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