Yamaha SR500 & SR400 Forum

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 Post subject: Re: Fork ajusters?
PostPosted: Fri Apr 17, 2015 1:00 pm 
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Joined: Wed Jun 05, 2013 9:07 pm
Posts: 599
Location: South Jersey USA
You can find bell ray for oil at most shops.
Some oil does come out with the springs, let it drip a while or just add some.

If you buy progressive brand fork springs for an SR500, you need to make spacers.
PVC pipe works fine, they tell you how long to cut it, and you can add some washers if you need to adjust the preload.

Bike up on center stand, towel over the gas tank, remove handlebars, loosen top fork clamp, remove fork cap, pull springs out, replace with progressive suspension spring and spacer, add some oil (or not).

I do not have a service manual yet, so can not say how much oil the forks take.
On my TU250 they say pull the springs, compress the forks all the way, and fill with oil to about 1 inch from the top.
That was about 400cc's I think, but they were thicker forks.

I need to add a little bit more preload to my forks, but they are much better with the progressive springs (which are NOT progressive).
The stock springs are progressive wound, the progressive springs are not, go figure...

Thicker oil increases the damping, which makes sharp edged bumps feel harsh.
I like the stock damping on my SR front and rear, more then the TU had, not excessive.
I think its a nice general purpose ride, the forks WERE too soft (springs) but not now.


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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 12, 2015 6:27 pm 
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Joined: Fri Mar 06, 2015 7:39 pm
Posts: 329
Location: Metro Atlanta, GA
I definitely like the damping of the SR forks. It handles bumps, dips, and other irregularities very well. It's a very comfortable ride. Except for that layer of skin that got rubbed off the top or my left big toe, from shifting.
I rode Friday, Saturday, and Sunday. If I had the time and energy, I'd ride it every day.

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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 12, 2015 6:53 pm 
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Joined: Thu Oct 03, 2013 2:01 pm
Posts: 3134
Location: South Central Wisconsin, USA
Just make it to retirement and every day is Saturday :D

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1981 SR500 old school 'Caff Racer'
2009 Suzuki TU250X
In all things maintain thy uprightness lest the ground rise up and smite thee.


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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 12, 2015 10:50 pm 
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Location: Metro Atlanta, GA
gcrank1 wrote:
Just make it to retirement and every day is Saturday :D


true :mrgreen:

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Screw this, I'm going riding!

"Mulder, toads just fell from the sky."
"Guess their parachutes didn't open."


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 Post subject: Re: Fork ajusters?
PostPosted: Mon May 18, 2015 8:01 pm 
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Location: South Jersey USA
I do ride every day unless I have to work late or its raining.
Love the SR.


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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 19, 2015 1:19 pm 
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Joined: Fri Mar 06, 2015 7:39 pm
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Location: Metro Atlanta, GA
NJ-brett, where did you buy your Provressive form springs?

Also, can I use solid Delrin rod for the spacers ?
I have Delrin rod and I have a lathe.
I don't have any PVC pipe

Thanks

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Screw this, I'm going riding!

"Mulder, toads just fell from the sky."
"Guess their parachutes didn't open."


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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 19, 2015 2:23 pm 
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Joined: Thu Oct 03, 2013 2:01 pm
Posts: 3134
Location: South Central Wisconsin, USA
The PVC pipe is the common, cheap 'plastic plumbing pipe available at any home center or hardware store. It cuts easily with a hacksaw or even a wood saw, way easy to work with and some stores even sell short cutoff pieces. If you are on good terms with your hardware store guy he might even give you a cutoff chunk from their junk pile.
Now, iffn ys want to go to the trouble of turning Delrin, go ahead, you will have braggin' rights.

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1981 SR500 old school 'Caff Racer'
2009 Suzuki TU250X
In all things maintain thy uprightness lest the ground rise up and smite thee.


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 Post subject: Re: Fork ajusters?
PostPosted: Tue May 19, 2015 4:58 pm 
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Joined: Fri Mar 06, 2015 7:39 pm
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Location: Metro Atlanta, GA
I've turned knife and safety razor handles from Delrin
Spring spacers shouldn't be a problem
What diameter do the spacers need to be?
I thought about turning them from aluminum or steel

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"Mulder, toads just fell from the sky."
"Guess their parachutes didn't open."


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 Post subject: Re: Fork ajusters?
PostPosted: Thu May 21, 2015 8:21 am 
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Joined: Wed Jun 05, 2013 9:07 pm
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Location: South Jersey USA
You are over thinking the spacers, almost everyone uses pvc pipe, it costs about $1.00 and takes 1 minute to cut. You can also cut it with a tubing cutter.
3/4 or 1 inch pipe, I do not remember what fit.

Stock spacers are often very thin rolled steel tubing.

Google progressive fork springs for an sr500.
If I find where I got mine from I will post it.

I have not got around to increasing the preload, the bike is riding so nice I never bothered.
I am easy to please, but the SR has the best ride of any street bike I have had I think.


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 Post subject: Re: Fork ajusters?
PostPosted: Thu May 21, 2015 9:12 pm 
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Joined: Fri Mar 06, 2015 7:39 pm
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Location: Metro Atlanta, GA
Does the SR handle better with the Progressive springs?

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"Guess their parachutes didn't open."


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