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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 08-18-2012, 11:27 PM   #41 (permalink)
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I had the same hunting with the Intiminators on my 08' Bonnie. I checked my static sag on the front and found that with the stock springs and under its own weight, the bike compressed the front forks 35mm. According to Traxxion, this is too much. So I ordered new single rate springs from Traxxion, rated for my weight. Installed those with the spacers supplied by Traxx and remeasured the static sag, now at a more reasonable 20-22mm. With me on the bike the rider sage is set to 30mm and I have very little pre-load on the springs. BTW, I'm about 185lbs with gear.

Moral of the story, if you feel hunting, dont increase pre-load. Buy new springs for your weight. Measure your sag, you cant have a conversation about suspension without knowing your sag numbers. From what I've read, the bike should settle between 20-25mm under its own weight and about 30-35mm with you on it. This worked for me, no hunting and really nice suspension action up front.
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Old 08-19-2012, 02:11 AM   #42 (permalink)
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Originally Posted by PeteV View Post
Another thing I noticed when I removed the Intiminiators, was that after 1500 mi on the 5W Amsoil oil, it had turned dark grey, and when pouring it out of the fork tube, it appeared to be due to fine metal particles that were suspended. Has anybody else noticed this?
I noticed it when I changed the fork oil for the second time. For me it was a milky grey color... fortunately I had the wrong brand 5wt oil, so I had to dump it anyway.


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Old 08-19-2012, 02:17 AM   #43 (permalink)
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Welsh & Sequil, I am a little surprised at your posts- only because there have been other threads about the hunting issue, and it has been recommended to drill a hole, I think .05" (better check that one) down through the center of the Intiminator. Brian at Ricor is willing to do mine for no charge (they are in the mail to him now), or you can drill them yourself. But, you need to be able drill around 1/4" depth through aluminum, and Brian recommended a "spot" or "center" drill in a drill press. Hope this helps. I can let you know the results when I get it put back together. I checked this thread paricularly to find out what other people are using for an air gap. The T100 is too harsh a ride for me, and I am thinking of increasing the air gap to soften it. Any recommendations? (120mm is the standard airgap for the T100). Thanks.
I was hoping there was a quicker or easier solution. I live in Germany, so I'll have to miss the rest of August (perfect weather riding season here) in order to send in my intimidators. I'm gonna find a shop with a drill press in town before I send them back to ricor. I'm also rather surprised I need any modification at all at 145 lbs... If anything, I should be the one guy the product has no issues with. But alas...


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Old 08-19-2012, 03:23 AM   #44 (permalink)
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I'll attempt to pull this info together on a spreadsheet in the next couple of days. Keep the comments coming .... the more data available, the better picture we'll have of the situation. Thanks to all who've already taken time to answer.

Bob
what ever happned to the spreadsheet?

seems the common denominator is Amsoil 5w
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Old 08-19-2012, 07:25 AM   #45 (permalink)
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As an update I have tried increasing and decreasing the air gap by 10mm, it makes a noticeable harder/softer ride difference but the hunting is still there. Next, I`ll try the drilling the .05 hole in the intiminator. I bought another bike, a Sprint ST, so it`s dropped off my 'must fix' list but I`ll get it done within the next couple of weeks and post the results.
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Old 08-24-2012, 08:14 PM   #46 (permalink)
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I had some bad hunting problems on my Bonnie (05) with stock set up. I ordered the Intiminators to help. I installed these today and so far so good. I simply installed them as spec. from the manufacturer and did not shorten the spacer. Living with a mile of dirt road that is severely 'wash board' the bike used to twitch really badly and the suspension was having a hard time dealing with the road surface (or lack thereof). My test drive today seems to have been greatly improved the handling on this road. Also on a fairly smooth surface (regular road) there is noticeably less 'hunting' going on. There is also some worn out road surface in the county here that has the top layer missing, not deep enough to be considered a pot hole, but still an inch deep or so. I used to avoid these imperfections but with the intiminators I thought I would ride over them to see. I barely notice them at all. It's early days for me yet so I will reserve judgement until I have a few hundred miles or so under my belt, but so far so good.
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Old 08-31-2012, 12:05 AM   #47 (permalink)
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After a few hundred miles or so riding the intiminators have definitely improved the handling. Significant 'bumps' in the road simply disappear and the handling is great. The washboard on the dirt road around here are a non issue now.
However I do still have that niggling 'bounce' sensation on slightly uneven or undulating road surfaces. Perfect road surfaces (we have a new stretch just done) there is no issue so I know it is not a wheel balance issue or oval tyre as the sensation disappears.
I've read a few threads discussing possible solutions and I was wondering who made an adjustment that definitely cured the issue. Since the problem was there before installing the intiminators I and reluctant to mess with them. Some solutions I have seen posted are as follows:-

1) Reduce the oil level from 120mm to 140 mm.
2) Cut the spacer down to compensate for the depth of the Ricor.
3) Ricor suggest drilling a .05 hole down the center of the Intiminator.
4) Change oil viscosity. (I have the recommended Amisol 5w)
5) Change the spring.

Has anyone tried any one of those options (or other options) that definitively cured the bounce effect on a smooth road like I mentioned?

As a side note I tried playing with the preload on the back springs and felt that this seemed to have had an effect. But it may just be a placebo effect. I do have stock shocks on the rear. Does anyone know if adjusting the rear preload would affect the feeling on the front?

A lot of questions I know but I know there are some geniuses out there.
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Old 11-27-2012, 03:22 PM   #48 (permalink)
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From what I'm gathering is those who have installed fork springs matched to their weight, have no issues. Brand doesn't seem to matter be it Traxxion or Ikon.

Those of you who have replaced the front springs to match your weight, have any of you had to drill your intiminators?

Did anyone already have their dampening rod drilled from an emulator install?
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Last edited by Wheelhorse; 11-27-2012 at 04:10 PM.
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Old 11-27-2012, 03:31 PM   #49 (permalink)
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I'm running 10wt Hyperpro oil with 125mm air gap and Hagon springs. My preload adjusters are different than a Thruxton, but I'm using a minimal amount. Mind you, I'm a hefty 300+++ lbs.


Quote:
Did anyone already have their dampening rod drilled from an emulator install?
Yes. On another T100 I'm running YSS PD310 emulators with 5wt Maxxis oil and the damper tube drilled per YSS instructions. Springs are Hyperpro and preload adjusters are stock Thruxton (dialed in about 1/2 way as I recall).

And on yet another T100, I'm running Bitubo cartridges with 5wt oil. I want to say the springs are 90Nm/cm... but don't hold me to that. The preload adjusters are set to minimum. I ended up crashing that bike, but it felt like it was on rails before I high-sided it. Draw your own conclusions.

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Old 11-27-2012, 03:42 PM   #50 (permalink)
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Originally Posted by Wheelhorse View Post
From what I'm gathering is those who have installed fork springs matched to their weight, have no issues. Brand doesn't seem to matter be it Traxxon or Ikon.

Those of you who have replaced the front springs to match your weight, have any of you had to drill your intiminators?

Did anyone already have their dampening rod drilled from an emulator install?
I installed Race Tech single rate (0.9kg) springs to match my weight with the Ricor Intiminators and the setup works superbly. The Intiminators are not drilled and don't need to be.

I installed everything by the book: I cut the spacers so that everything was the same length, I used 5W fork oil as specified by Ricor, air gap set to factory specs and I used the Thruxton's pre-load adjusters to set sag to 30mm. The dampening rod was not removed or altered/drilled.
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