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Filling forks
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Saltcreek
Flying Brick Rider


Joined: 22 Oct 2008
Posts: 957
Location: New Hampshire

PostPosted: Thu Apr 09, 2009 5:47 pm    Post subject: Filling forks Reply with quote

If there's a fork oil change thread I couldn't find it. Has anyone found the perfect container or container and funnel for measuring and adding fork oil without getting it all over the place? I'm thinking like a graduated bottle with a squeeze top but I haven't found one yet.
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium


Last edited by Saltcreek on Thu Apr 09, 2009 6:30 pm; edited 1 time in total
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SugarHillCTD
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PostPosted: Thu Apr 09, 2009 6:15 pm    Post subject: Reply with quote

Great question, Jim.

I should be at that point within the next few days. Seals are going in tonight and I should have time to put the front end together by the end of the weekend.

John
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Rider
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Joined: 05 Apr 2003
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Location: La Grande, OR

PostPosted: Thu Apr 09, 2009 6:37 pm    Post subject: Filling forks Reply with quote

Jim,

The only way I have come up with to refill the forks is to use a plastic graduated bottle that can be squeezed to expel the oil. You need to find a container that will accept the spout that comes on quart gear oil containers. Then you need two sizes of clear tubing, the larger to fit over the spout and the smaller to fit inside the larger. The problem, as you have discovered, is that the filler hole is small and down under the handle bar. I have tried a funnel and plastic tube but that seems to take forever for the oil to run in. The squeeze bottle and tubing speeds the process and gets all the oil inside the fork.

Ed
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Rider
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PostPosted: Thu Apr 09, 2009 6:42 pm    Post subject: Filling forks Reply with quote

And John you can fill your forks with a small funnel before you install them in the triple clamp.

Ed
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RAL88
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PostPosted: Thu Apr 09, 2009 6:43 pm    Post subject: Reply with quote

I use a syringe like the kind you get at the grocery store for injecting turkeys.
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Saltcreek
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PostPosted: Thu Apr 09, 2009 6:44 pm    Post subject: Reply with quote

Quote:
The problem, as you have discovered, is that the filler hole is small


Wait, when I unscrewed one to look, the whole cap came out, about 1 1/4". I thought it was supposed to. I didn't have time to fool with it to separate the smaller plug from the cap.

Where did you find a graduated squeeze bottle? Why not dispense directly from the squeeze bottle?
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
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Flying Duck
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PostPosted: Thu Apr 09, 2009 8:12 pm    Post subject: Reply with quote

Pyrex measuring cup from the kitchen and a funnel. I'm a "no special tools required" kind of guy. Very Happy
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SugarHillCTD
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PostPosted: Thu Apr 09, 2009 8:37 pm    Post subject: Re: Filling forks Reply with quote

Rider wrote:
And John you can fill your forks with a small funnel before you install them in the triple clamp.

Ed


Uh...... the upper part of the forks are still on the bike. And I haven't taken the caps off the top of the fork legs yet. Is this going to make it harder to refill them?


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endoman100
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PostPosted: Thu Apr 09, 2009 9:41 pm    Post subject: Reply with quote

I use a 30cc slip tip syringe with a 6" small clear tubing like fish tank air tubing. I take my time and no spillage Very Happy
and I leave my forks in the tree also.
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Rider
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PostPosted: Thu Apr 09, 2009 10:10 pm    Post subject: Filling forks Reply with quote

Jim,

What you have off the top of the fork tube is the spring retainer which has the fill plug in it. Might as well dump in the measured amount of fork oil and screw it back on. If you can. If you have a strong fork spring you might not be able to get it to go back on and then you will know why there is a fill plug in it. You might get it back together if you have a helper to either turn the wrench or hold the retainer against the tube.

John,

I jumped to the conclusion that you had the forks out of the tree. You have to use the squeeze bottle, syringe or Duck's funnel. The reason I used the squeeze bottle is that it's graduated in ccs and I could put in the 400 or 450 ccs of oil at one shot.

Good luck,

Ed
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Scott_Anderson
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PostPosted: Thu Apr 09, 2009 11:05 pm    Post subject: Reply with quote

I picked up an oversized (50cc) syringe from a local pharmacy for like $1.
I've used it both with and without the plunger. Either way you have to take it slow so you can let the air out of the fork as the oil goes in.
Otherwise you will have a mess. DAMHIK. Rolling Eyes
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Jim
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PostPosted: Fri Apr 10, 2009 12:02 am    Post subject: fork oil Reply with quote

hi Jim - I think there are probably a few fork oil threads - and there should be something about fork oil in one of the tech stickies or on the main page.

It's 350cc and 400cc.
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Milton
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PostPosted: Fri Apr 10, 2009 2:41 am    Post subject: Reply with quote

I use a baby bottle. Good graduations for measure and just pinch out a larger hole in the nipple. Not too messy.
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SugarHillCTD
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PostPosted: Fri Apr 10, 2009 6:17 am    Post subject: Reply with quote

Hey everybody- (Jim, sorry for the hi-jack but I think that your question has been answered)

Thanks for all the tips on the forks.

Yesterday was the turn around from dismantling to reassembly.

The fork seals went in very easily- I warmed the fork legs for slight expansion and found something just the right diameter to tap them home.

This evening the timing cover and valve cover go back on. Then the fork legs with their new gaiters, new tires (Pilot Road 2) and..........a fan switch.

PLUS the new Ram shock should be here SOON.

Hey then back on the road Very Happy
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Saltcreek
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PostPosted: Fri Apr 10, 2009 7:29 am    Post subject: Reply with quote

Quote:

Jim,

What you have off the top of the fork tube is the spring retainer which has the fill plug in it. Might as well dump in the measured amount of fork oil and screw it back on. If you can. If you have a strong fork spring you might not be able to get it to go back on and then you will know why there is a fill plug in it. You might get it back together if you have a helper to either turn the wrench or hold the retainer against the tube.


OK, should I be worried that nothing happened when I removed the retainer? I just screwed it back in. I should have held the hex shoulder of the retainer while removing the plug?

Quote:
(Jim, sorry for the hi-jack but I think that your question has been answered)


I wasn't going to say anything. Smile Actually the threads that meander are usually the most interesting.
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium
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SugarHillCTD
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PostPosted: Fri Apr 10, 2009 7:43 am    Post subject: Reply with quote

Sorry about that chief. (You have to be a "geezer" to know where that originally came from)

Now back to the OP's thread........
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Phil Marvin
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PostPosted: Fri Apr 10, 2009 10:03 pm    Post subject: Reply with quote

Hi, All,
To change fork oil, I use an old gear oil container (with the spout) with the bottom cut off, in other words, a funnel. I slide a piece of plastic tubing over the end of the spout. I insert the end of the tubing into the fork tube and tie the container so it is upright and reasonably steady. I then use a baby bottle and measure 200cc of fork oil and pour it into the funnel/container. It slowly drains into the fork tube. I measure another 150/200/220cc (depending on side/bike I'm working on) and pour this into the funnel/container. When it has all drained out, I switch sides and tie the container above the other fork tube. I do the same thing and add the proper mount of oil into the other fork tube. I withdraw the plastic tube and remove the funnel/container and replace the fill plugs. I clean the container and put it away until next year.

CAUTION: Don't let the tubing fall off the spout and fall ino the fork tube! It HAS come off the spout, but luckily not gone completely into the fork tube!

Ride Safe,
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Saltcreek
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PostPosted: Sat Apr 11, 2009 7:58 am    Post subject: Reply with quote

Quote:
CAUTION: Don't let the tubing fall off the spout and fall ino the fork tube! It HAS come off the spout, but luckily not gone completely into the fork tube!


Having had a peek in there accidentally I don't think there's anywhere for the tube to go.

I'm wondering if this method runs the risk of oil overflowing if it can't get in fast enough. It seems like the ideal thing would be to make a reservoir that actually threads into the plug's threaded hole. I'm probably making this to complicated having not yet tried the measuring cup and funnel program.
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium
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Phil Marvin
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PostPosted: Sat Apr 11, 2009 1:25 pm    Post subject: Reply with quote

Hi, Jim,
It is a small tube. It takes, maybe, 5 minutes for the 200cc to drain into the fork tube. I have never had it overflow, and I've used it on 2 K1100LT's and 3 K75's.
Ride Safe,
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endoman100
Rider in the Sky


Joined: 26 Jan 2009
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PostPosted: Sat Apr 11, 2009 4:02 pm    Post subject: Reply with quote

Saltcreek wrote:
Quote:
CAUTION: Don't let the tubing fall off the spout and fall ino the fork tube! It HAS come off the spout, but luckily not gone completely into the fork tube!


Having had a peek in there accidentally I don't think there's anywhere for the tube to go.

I'm wondering if this method runs the risk of oil overflowing if it can't get in fast enough. It seems like the ideal thing would be to make a reservoir that actually threads into the plug's threaded hole. I'm probably making this to complicated having not yet tried the measuring cup and funnel program.


The biggest problem is how fast/slow it goes in..
let's pretend that you are changing the fork oil.
you can change the oil without pulling the forks from the tree.
if this was a fork oil change you would drain the oil from the bottom fork
and remove the hex bolt from the top of the fork to refill it.
If you go to fast the oil will not let the air escape as you are putting the oil in and it would spill all over the place..
I have replaced the oil in mine a few times and as long as you let the air come out as you put the oil in you have no mess.
take your time and all is good.
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