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Old 07-23-2013, 11:15 AM   #166
SOLO LOBO
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Joined: Mar 2004
Location: Shoreline, WA
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Here's a shot of a G/S at the national BMW rally... for some reason my phone didn't save the other shot I took of this bike. The guy looked to be running stock KTM clamps, what was intersting is his headlamp bucket bracket... he had the stock length swing arm with a taller shock that looked to jack up the back end a bunch...

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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.

SOLO LOBO screwed with this post 07-24-2013 at 09:53 AM
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Old 07-26-2013, 06:57 AM   #167
aerone
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I feel like I must be lucky or something. I've been riding the crap out of my GS with the SM front end and custom trees for a while now. No problem at all. It is a little over braked, I got the front wheel to slide on pavement when braking a while back. I guess there for a second I thought I was riding my 950SM.
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Old 07-26-2013, 09:49 AM   #168
naginalf
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Quote:
Originally Posted by aerone View Post
I feel like I must be lucky or something. I've been riding the crap out of my GS with the SM front end and custom trees for a while now. No problem at all. It is a little over braked, I got the front wheel to slide on pavement when braking a while back. I guess there for a second I thought I was riding my 950SM.
Are you using the stock BMW master cylinder or did you swap controls and bars for the KTM stuff? Do you have the standard or oversize rotor?
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Old 07-26-2013, 12:03 PM   #169
aerone
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I'm using a 16mm BMW master cylinder, made only a year or so I believe. Using all the stock controls mounted on KTM 950SM bar and risers. I had the lower clamp drilled and fitted the stock KTM brake lines and am using both 950SM radial mount calipers. We made a two piece adapter for the stock BMW hub to carry both KTM rotors on the BMW wheel. I used the KTM stem that was shortened and rethreaded with stock BMW head bearings and all stock BMW dust covers. A hybrid of 950SM and 88GS parts. I have resisted the call to mount my extra 950SM front wheel on it. No mods yet the WP front end, works great with an Ohlins out back.

There are some pictures back a few pages that AW put up for me. Notice the offset since I didn't use a leading axle front end. No problem since I carefully measured the location of the BMW axle center horizontally to the bike and vertical to the floor before disassembly. Never moved the bike and was able to mill the top of the tubes until they slid up enough to get the axle centered.
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Old 07-26-2013, 02:40 PM   #170
naginalf
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Ah, yes, nice bike there, I remember now.

I was just wondering, since I could maybe get mine together if I could use the stock MC on the single rotor KTM, but I'm pretty sure that it would be too soft. But, I've gone too far into this, and scope creep has gotten the better of me once again. Why do all my bikes end up in pieces?

Anyway, I did end up ordering another semi-used wheel, got a great deal on a new, black excel with paint blemishes mated to a black, talon hub with new, heavy duty spokes for only $200 from a reputable wheel shop that sells it's seconds and rebuilds on ebay. Only about $1600 more to go, woohoo. I'm gonna go ahead and say it's not gettin done this year.
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Old 07-26-2013, 02:52 PM   #171
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Quote:
Originally Posted by naginalf View Post
I was just wondering, since I could maybe get mine together if I could use the stock MC on the single rotor KTM, but I'm pretty sure that it would be too soft.
If I were in your shoes I'd be willing to gamble a few bucks in brake fluid to find out.
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Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 07-26-2013, 02:53 PM   #172
SOLO LOBO
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I'm running the stock BMW 13mm MC to a stock KTM caliper with a 300mm rotor and the brakes are as good as my former set-up which was an HE 320mm rotor with the stock BMW caliper and MC
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 10-14-2013, 09:18 AM   #173
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Time for the seasonal thread bump. Have any more buyers of Rdubb triples gotten around to installing their forks? Any more results/suggestions/questions/observations to share?
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R80ST Gets The HPN Treatment
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Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 11-22-2013, 09:40 AM   #174
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I just stumbled across this the other day. I haven't had my forks completely apart and this explains all the pieces one will encounter when breaking these down. Note these are from a 2004, so it's got some parts that were eliminated in later models.

http://ktmdirtquestions.com/how-to-k...rk-components/
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 11-25-2013, 04:04 AM   #175
jian var
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Hi all,
I have a WP 4357 fork which i want to install on my R100GS PD. I know that almost everyone is installing 4860s. Is it a good idea to put it on or not?
I will try to install it with the original KTM triples. Cause I am not familiar with the technical issues can please someone tell me in simple words what are the pros and cons?
Is it doable?
Thank you in advance!!!
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Old 11-25-2013, 02:45 PM   #176
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You might want to contact R-Dubb here. He used 4357s on his bike. As far as I know, functionally they're pretty much the same as 4860s and some say they're lighter and have less stiction, but I've never used them so can't comment.
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 11-25-2013, 02:53 PM   #177
jian var
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Thank you!
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Old 11-26-2013, 01:16 AM   #178
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Jian Var,
4357's: worked pretty well from what I have heard (on airheads), but I thought they were very prone to blowing oil seals, at least when used on heavy bikes like ours (and possibly in general). Again, from what I have heard from good sources, the 4860's at least for our application were a step up in reliability.
Original KTM triples will be a lot less offset than the bmw was 'designed for', which will change the trail and steering dynamics and will also most likely (without mods) reduce your turning circle.
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Old 01-30-2014, 12:11 PM   #179
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Your comments please fellow inmates!!!
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Old 04-09-2014, 03:54 AM   #180
GrahamM
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#2106 '81 R80G/S WP4860 w/200mm travel, stock geometry

Got this all together yesterday, so far very happy with the new front end. Final tuning this weekend with a decent ride around the area.

Forks are from a 04 450SX KTM, a 100mm spacer was added to reduce travel and length to match original BMW travel and wheel position. springs are shorter with a .7 stiffness value. Feels a bit stiff but i will not able to tell until I get into some rough stuff.

Triple is from Henderson. Very nice quality. Bar mount is ready to accept a GPR stabilizer once I get the stabilizer post from Henderson.

Bars are Renthal Fat Bars.

Front fender - KTM - 2008-2011 white.

Front wheel and disc - KTM from I think a 04 vintage, like the silver rim.

Master and caliper from a 09 KTM 450

Brake disc and master might be a bit small and will look to a bigger diameter of the disc and maybe increasing bore of the master. I believe the RC4 640 parts would be the best match for this bike, it's weight and what I will carry.























walk around with start:

http://s421.photobucket.com/user/gra...1450b.mp4.html
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