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post #1 of 11 (permalink) Old 06-20-2015, 08:46 PM Thread Starter
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Fork oil level with pvc and intimidators

Is everyone with intiminators and pvc spacers increasing their air gap to account for the greater volume of the pvc vs the Oem metal spacers?

I have a 2013 mag wheel apart and just refilled the forks to the Oem level of 106mm below the fork tube. But now I'm thinking it may be too much oil because the pvc is thicker and taking up more volume. I did cut the pvc 14mm shorter to account for the intimidator.

Any help is greatly appreciated as I want to wrap this up by tomorrow.

Sean

Last edited by Doog; 06-20-2015 at 08:57 PM.
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post #2 of 11 (permalink) Old 06-21-2015, 12:31 AM
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I don't like the idea of a thicker spacer giving less oil volume, so even though I don't intend to fit intiminators, if I did I would buy a second set of OEM spacers and get them cut to length.
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post #3 of 11 (permalink) Old 06-21-2015, 06:45 AM
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Quote:
Originally Posted by Doog View Post
Is everyone with intiminators and pvc spacers increasing their air gap to account for the greater volume of the pvc vs the Oem metal spacers?

I have a 2013 mag wheel apart and just refilled the forks to the Oem level of 106mm below the fork tube. But now I'm thinking it may be too much oil because the pvc is thicker and taking up more volume. I did cut the pvc 14mm shorter to account for the intimidator.

Any help is greatly appreciated as I want to wrap this up by tomorrow.

Sean
Sean,
I recently put in Race Tech imulators, their springs, and I cut the OEM metal tubes for spacers. I called RT and verified their printed #, which is 125 mm for my application.
I don't have as much experience with suspension as other areas, but it can't hurt to start with less oil and add as needed.

Namaste,
Charles
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post #4 of 11 (permalink) Old 06-21-2015, 08:28 AM
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Depending on the final length of the spacer you should be able to lower the fluid level by 10mm, Keep in mind fluid level should be set with Intiminator in and springs out and fork compressed. Also as a tip leave the Intiminator out and add fluid to the top of the damper rod and pump the forks to get the air out and when bubbles are gone add more fluid to top of damper rod and then install Intiminator and then set final oil level.

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post #5 of 11 (permalink) Old 06-21-2015, 09:22 AM Thread Starter
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Thanks guys for your suggestions. I followed Ricors instructions to a T when adding the oil and intiminators. I was hesitant to cut the original spacer in case I didn't like the feel and wanted to go back to stock. I think I will take out an additional 10mm of oil and go from there since I still have the forks off the bike. If it rides decent then maybe I'll just cut the original spacers and fine tune the level.


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post #6 of 11 (permalink) Old 06-21-2015, 11:47 AM
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Not sure about the stock level on a 17" wheel bike, but it's 120mm on a T-100. I run the shortened PVC spacer with a level of 140mm measured as described above. This gives you a bit more air spring effect and I prefer a softer front end. YMMV of course.

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post #7 of 11 (permalink) Old 06-21-2015, 11:58 AM Thread Starter
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Thanks Baron that helps to give me a range. Stock is 106 so maybe I'll try 120. I just looked up the oem spacers and they are only $8 each. So not a big deal if I end up cutting them. I'll try the pvc first since I already have them cut.


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post #8 of 11 (permalink) Old 06-21-2015, 04:21 PM
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I just installed Intiminators in my T100.

I decided to set the entire front end up properly once and for all as I suspected the bike had too much sag on it the way it came from the factory. In fact the front was sitting "nose down" with me on it.

Which means I also suspected it had less ground clearance and could drag the pegs in corners or possibly hit the pipes if I leaned it over real far. Not good.

My goal was to get all the travel possible out of the fork as stock you only have about four inches to work with anyway. And you give up an inch for sag. So that means you are riding on at best only three inches of upward travel to soak up potholes. Not much.

Oil level is only part of the factors. Used correctly the deal is that if you overfill it you limit how far the fork can travel and waste some of its movement by stopping too soon before it is fully compressed.

If you take out more oil the fork can move farther before it "bottoms out."

If you take out waaaaay too much oil the front fork will have too much room to move upwards when you hit a bump and you will get either a clunk or a bang when you hit metal to metal.

I left in the stock spacers with my T100 when I installed the new Intiminators. This gave me a sag setting of 28mm with me on the bike using the Racetech method of pulling up and settling and pushing down and settling and averaging the two sag numbers.

I had refilled the tubes with about 20% less oil than stock to get the required result. I am guessing stock there was too much oil in there. And the Intiminators were taking up some extra space so even LESS oil was needed.

At the end of the day it matters most of all to understand WHY you are trying different levels and WHAT you want the fork to do when it hits bumps.

I drained the forks overnight and pumped out all the old thicker oil of course. But I use a slightly different method for measuring how high up the oil level is in each fork tube.

With each cap off I stick a car dipstick down the tube until I touch oil. I make sure each tube is set the same.

Then I change oil levels to make the fork travel increase or decrease. It is easy as all it takes is removing the fork cap a couple of times until the fork gets full travel with no clunk. A turkey baster with an extension tube sucks out the oil if you go too far.

I use tie wraps tied around the tubes to see how far the fork can move. There is a fairly high "speed bump" not far from my house and I use it to test how much the fork can move on potholes. I am getting perfect results hooray hooray!

The pictures show a small but quite noticeable increase in how high the nose sits and how much fork space is showing between the lower triple tree and the lower leg oil seal.

The bike used to sit nose down. Now it is level.

One interesting thing is the book says T100s have 120mm of available fork travel with the oil and springs removed. Mine had only 110 as others have reported.

So four inches is what you have to work with if you squeeze out every last mm.

Boy does the Triumph handle well. I am in love.

Some of you must think it's a race and you HAVE to be first---sorry, I don't have that problem!

Last edited by Trumpettwin; 06-21-2015 at 04:28 PM.
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post #9 of 11 (permalink) Old 06-21-2015, 07:00 PM
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Quote:
Originally Posted by Doog View Post
Thanks Baron that helps to give me a range. Stock is 106 so maybe I'll try 120. I just looked up the oem spacers and they are only $8 each. So not a big deal if I end up cutting them. I'll try the pvc first since I already have them cut.


Baron?! Were we in school together or did you race with me in the '60's? Not many know that nickname!

Don't sweat the PVC as I doubt they are even IN much oil. 106 is interesting. 120 sounds fine if it feels good to you. If you're light, you could run even less.

'09 T-100 Forest Green / New England White, TORs, Intiminators & fork tubes raised 15mm, Chrome Ikon 7610 - SP8 Shocks, Custom Sargent Saddle, OEM Chrome Grab Rail, Conti Road Attack 2 EVO's 110/80VR19 & 150/70VR17, 7" Cibie lens and uprated H4 bulb.
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post #10 of 11 (permalink) Old 06-21-2015, 08:30 PM Thread Starter
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Ha, I saw your name in your profile. I'm about 150lbs so we'll see if I need to take out more oil.


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