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Old 04-30-2013, 05:43 AM   #61
Prutser
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Quote:
Originally Posted by Airhead Wrangler View Post
If I had to guess, I'd say 42N/mm spring rate and 280mm free length.
I think you are right on the length but with the ratio of that TAG swing arm the spring rate needs to be at least 80 N/mm or more.

Do you know what spring rate is on your bike AW ?
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Old 04-30-2013, 06:21 AM   #62
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Originally Posted by Prutser View Post
Do you know what spring rate is on your bike AW ?
Nope, but I know it's too soft, whatever it is.

EDIT: You got me curious so I went back and looked at a few photos and managed to catch the number in one of them. It's a 75-240 spring, also made by WP, so those numbers should be directly comparable.
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Old 04-30-2013, 08:35 AM   #63
Prutser
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Quote:
Originally Posted by Airhead Wrangler View Post
Nope, but I know it's too soft, whatever it is.

EDIT: You got me curious so I went back and looked at a few photos and managed to catch the number in one of them. It's a 75-240 spring, also made by WP, so those numbers should be directly comparable.
Your numbers sound right. It will be 240mm long (free length) and 75 N/mm.
Our shocks were mounted on almost the same place but your swing arm is longer. ( if I remember correct from the drawings you made?)

On my bike I'm using a 90 N/mm spring with 15mm pre load and I might even try a stronger one.
With more pre-load I would have the risk of the coils blocking. And a the mono swing would start to jack to high so I have no dynamic sag when I'm riding anymore.

If you mount a stronger spring on your shock you should be able to get your fork moving a bit better too.

Now back to Ras his bike
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Old 04-30-2013, 10:48 AM   #64
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Originally Posted by Ras Thurlo View Post
great advice, with a bit of route-planning the RT clutch cables worked out great on the giraffe risers

already had long brake line, so did not have the worry about that

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your bike is suitably dirty. Well done.
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Old 04-30-2013, 02:08 PM   #65
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Originally Posted by Ras Thurlo View Post
[IMG] photo IMG_0192_zps8300d94e.jpg[/IMG]

Off topic, but still on two wheels, sort of. Is that Vespa scooter off to the right an SS (with the "big" 180cc two stroke engine)? I can't remember how many models came out with that shaped head light.

That tank looks good, and who need more than 35 litres anyway?
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Old 04-30-2013, 03:47 PM   #66
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Originally Posted by Ras Thurlo View Post
I am glad that my eco-friendly centerstand mod was noticed. Should also work well as a biodegradable bash plate.

In the meantime I also got a telescopic side stand from Migsel. Its real chunky and well made, as well as being able to deal with moving the spring so that it can work like a 'real' side stand.

Although will need to try out how it feels in this location as there is quite a lot going on in this particular corner of the bike between carbs, gear-lever, footpegs and side stand
Where can the side stand be ordered?
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Old 04-30-2013, 04:05 PM   #67
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Where can the side stand be ordered?
Google migsel bmw, go to site and send email. It will not be listed in the webshop.
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Old 04-30-2013, 10:41 PM   #68
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Originally Posted by gsd4me View Post
Off topic, but still on two wheels, sort of. Is that Vespa scooter off to the right an SS (with the "big" 180cc two stroke engine)? I can't remember how many models came out with that shaped head light.

That tank looks good, and who need more than 35 litres anyway?
Got to agree, that tank does look good,as is the rest of the bike. Is there good steering lock with the tank indentations ?
Those are some big Rox Risers.! ! Ithought mine were big at 3 1/2 inches, but i have mine angled back a lot further. How is the reach to the bars when sitting. A bit "Easy Rider"
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Old 04-30-2013, 11:52 PM   #69
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Those are some big Rox Risers.! ! Ithought mine were big at 3 1/2 inches, but i have mine angled back a lot further. How is the reach to the bars when sitting. A bit "Easy Rider"
They are probably just the ticket for standing though. I am 178cm tall with longish legs and I can't get my bars high enough or pegs low enough to stand comfortably. On my previous bikes, an 1100GS and Xchallenge I was able to set them up so I could stand almost straight up with comfort for many kilometres.
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Old 05-01-2013, 06:46 AM   #70
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Originally Posted by Ras Thurlo View Post
 photo IMG_0200_zps7638ebe9.jpg
Hi Ras,
loving the build,

that looks a bit uncomfortably close in my very humble opinion.
Not much room at all for sticks and stones and mud and stuff...?

I've got the standard KTM two pot brembo caliper, and the same 320 rotor as you. My current caliper bracket set-up is a little complicated right now to go into, and I am about to change it anyway, but essentially with the stock caliper it gives me 8-9mm room on either side between the fork slider and the spokes. Although it took me a while to figure it out I didn't have to alter the stock wheel spacers or the caliper brackets like Jenna did.
sorry for the terrible photo, but you can kinda see the space on either side here.



It is probably not much good to you now because you have that caliper and HE bracket already, and apologies if it is old news to you, but the stock two pot brembo seems to have plenty of stopping power with the 320mm rotor, and there is a HE relocation bracket to make it work for a 320mm rotor- for either variation of the WP50 fork sliders and the differing caliper bracket lugs (forks that came stock with a 260mm rotor such as yours have smaller lugs, and forks that came stock with a 300mm rotor have larger lugs).
This post goes into a bit more detail about this stuff.

After all my work making my cobbled together brackets I ended up getting a spare set of WP50's that have the larger caliper lugs (ie from a bike that came with a 300mm rotor stock) and found the correct (used and cheap) HE caliper bracket to suit them- eg, this


sorry for the sidetrack and long post,
I hope it made sense.
Keep up the good work!
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Old 05-01-2013, 08:21 AM   #71
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I had thought the Brembo "goldline" 4-piston calipers only worked with the Supermoto, as the front wheel is smaller and there is more room to fit the wider caliper...
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Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 05-01-2013, 12:10 PM   #72
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Ras, whats going on with those funky exhaust pipes there?
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Old 05-01-2013, 07:20 PM   #73
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Originally Posted by SOLO LOBO View Post
I had thought the Brembo "goldline" 4-piston calipers only worked with the Supermoto, as the front wheel is smaller and there is more room to fit the wider caliper...
Yeah, that is right, that is the stuff I remember reading way back when I kept finding references to not being able to fit a 320 rotor to WP forks and a 21 inch wheel- wasn't a problem for us as it turned out but they must have been talking about using that caliper that Ras has. I did also read back then that there is a small amount of room that can be gained by carefully milling a little meat off the back of the caliper where it comes closest to the spokes. The rotor spacers have pushed that rotor so close to the fork leg though...
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Old 05-04-2013, 01:49 AM   #74
Ras Thurlo OP
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Originally Posted by Clay Spinner View Post
Ras, whats going on with those funky exhaust pipes there?
Moorespeed 42mm pipes and end can

[IMG] photo IMG_0174_zps6eaed9cc.jpg[/IMG]

[IMG] photo IMG_0175_zps55749a14.jpg[/IMG]
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Old 05-04-2013, 01:55 AM   #75
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Originally Posted by ontic View Post

that looks a bit uncomfortably close in my very humble opinion.
Not much room at all for sticks and stones and mud and stuff...?
It does fit, but you're right- does not leave any room for error.

esp when I go into the clay swamps that we get around here in the valley floors its could get all gnarled up.

I fear that you and Solo are right and that I will have to get a standard KTM two pot calliper. BTW- was told by the local orange boys that they improved a lot in 2012 so will probably just get a new one.

will the gold bling 4 pot calliper have the same problems on WP 4860s?

[IMG] photo IMG_0200_zps7638ebe9.jpg[/IMG]

Ras Thurlo screwed with this post 05-04-2013 at 11:38 AM
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