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Old 06-05-2007, 01:04 AM   #1
evilkymevil OP
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Cool2 Running a single disc

I have a KTM 950 04 and have found the front end of this bike to have a heavy front end. Especially after removing the heavy stainless mufflers and replacing them with custom made aluminium ones.
This amplifies and unbalances the heavy feel up front.

So to lighten the front end i have removed the original front side covers the complete dash and all the bracketery to support all this negative weight .
I have then made carbin fibre side covers and a carbin dashboard to support the instuments and indicators.

The headlight is original and is mounted to brackets that are clamped to the forks as well as the dash

Then i removed the right hand side caliper and disk and run a single brake line with a carbin fibre high guard.

These modifications have removed approxiamately 6 kg off the front .

Along with stiffer fork springs and heavier valving this has transformed the way the front end feels.

The biggest drawback i have had is a loss of braking power, approx 30 %

I think the master cylinder is designed for duel discs because it has a wooden feel to it initially then with more pressure it will pull you up but fairly poorly on bitumen.

So i pinched the master cylinder off my girlfriends dr 650 and this gave it a lot more feel but still lacks outright power,

After speaking with numerous mechanics about the correct master cylinder
i should use i got different answers.

Some said use a larger diameter piston some said smaller.

I have tried using my 11 mm kx450 master cylinder good feel no power.

I would love to put on a 4 pot caliper like moto master as on my kx 450 supermoto but their too wide.

Has anyone out their got any suggestions on this topic.
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Old 06-05-2007, 02:45 AM   #2
docgonzo
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balanced engineering

Quote:
Originally Posted by evilkymevil
I have a KTM 950 04 and have found the front end of this bike to have a heavy front end. Especially after removing the heavy stainless mufflers and replacing them with custom made aluminium ones.
This amplifies and unbalances the heavy feel up front....snip....
Has anyone out their got any suggestions on this topic.
Yeah, you should have left the "heavy" mufflers on the bike, the way the engineers meant it to be. Then, the balance would have been good.

By lightening the rear of the bike, as you have found out, you make the front heavier, effecting the steering balance that was carefully engineered into the bike. To say nothing of the jetting aggrevations. And the cost.

My SuperEnduro steers beautifully. And wheelies nicely. With the stock cans.
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Old 06-05-2007, 05:33 AM   #3
O.C.F.RIDER
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Quote:
Originally Posted by docgonzo
Yeah, you should have left the "heavy" mufflers on the bike, the way the engineers meant it to be. Then, the balance would have been good.

By lightening the rear of the bike, as you have found out, you make the front heavier, effecting the steering balance that was carefully engineered into the bike. To say nothing of the jetting aggrevations. And the cost.

My SuperEnduro steers beautifully. And wheelies nicely. With the stock cans.

HMMMM......Mine seems to wheelie OK even with aftermarket exhaust and the useless extra weight of the 2nd rotor and caliper PLUS crash-bars, driving lights, aftermarket triples, steering damper, GPS, route sheet holder,& metal bark-busters. Go figure?? Must be that carbon-fibre front fender adding the lightness
Rally On!!!
Chris
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Old 06-06-2007, 05:50 AM   #4
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Quote:
Originally Posted by O.C.F.RIDER
the useless extra weight of the 2nd rotor
Yes.. there is nothing as bad as having the useless extra weigh of a 2nd rotor. I just got my bike but think the 2nd rotor is the 1st thing I'll remove in my quest to make it lighter. I'll get one of those GS servo brake assist pumps and install it so i get the same stopping power. I think that'll be the tits.
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Old 06-06-2007, 07:30 AM   #5
O.C.F.RIDER
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Quote:
Originally Posted by Donkey_Kong
Yes.. there is nothing as bad as having the useless extra weigh of a 2nd rotor. I just got my bike but think the 2nd rotor is the 1st thing I'll remove in my quest to make it lighter. I'll get one of those GS servo brake assist pumps and install it so i get the same stopping power. I think that'll be the tits.
Even if you put on a 330mm rotor and Lockheed 6 piston caliper and wind up with even more braking power than the original set-up, the one thing you WILL NOT be able to get around is the SEVERE twisting of the forks BECAUSE there's only one caliper & rotor. But hey, it's your bike and at the end of the day, I don't really care if you take both rotors off and save even more weight
Rally On!!!
Chris
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Old 06-06-2007, 01:54 PM   #6
stk0308
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Sound more like you need to trade in for a Super Enduro.
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Old 06-06-2007, 08:06 PM   #7
Rock_93
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Why would you have twisting of the forks because of only one rotor? Isn't there lots of bikes with only one rotor? I'm sure they can't all have a problem with twisting forks.
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Old 06-07-2007, 04:00 AM   #8
evilkymevil OP
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.
I would like to try and put my motor master 4 pot caliper off my kx 450 supermoto.
It seems it will fit if i space the disc across approx 4 mm
Has anyone out there successfully put a 4 pot caliper on.
I know it may seem easy to trade my bike in on a superenduro but i really need the fuel range and comfort of the adventure.
I also have a set of 17" wheels off a gsxr 1100 that i have to use on bitumen.
This is another reason for the single disc i dont need to remove the caliper to change wheels.
On the the black stuff i mainly ride two up and surprisingly the brake has good feel braking right into the apex .
Its really only when i need to emergency brake that i cant pull it up quick enough.
I do have a dr650 master cylinder though as the original one lacks feel with 1 disc.

You blokes may say why bother but i love working on my bike nearly as much as i do riding it.
I am a boatbuilder by trade so i can fabricate carbin fibre products .
My mate made the mufflers for his and my bike for under $200 AUD for both.
The 17" wheels were only $ 750 from the wreckers.
So the mods have certainly have given me what i have been looking for .
A bike that when ridden hard will not push the front in turns and dive and bottom out when on rough ground.
The bike sits higher which gives me more suspension due to the lighter weight and stiffer springs.
I just need to get the front brake sorted before a bloody kangaroo jumps out in front of me.
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Old 06-07-2007, 04:35 AM   #9
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Quote:
Originally Posted by O.C.F.RIDER

HMMMM......Mine seems to wheelie OK even with aftermarket exhaust and the useless extra weight of the 2nd rotor and caliper PLUS crash-bars, driving lights, aftermarket triples, steering damper, GPS, route sheet holder,& metal bark-busters. Go figure?? Must be that carbon-fibre front fender adding the lightness
Rally On!!!
Chris
You forgot to say that even at 80 mph+ the bikes suspension is compressing but that front end still came up. You need to stop trying to catch me

Single disc is trick looking but the wiehgt of the bike warrants the need for the double disc setup.

later,
A
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Old 06-07-2007, 04:50 AM   #10
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Quote:
Originally Posted by docgonzo
And wheelies nicely. .


The only way your SE will wheelie is if someone else rides it !
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Old 06-07-2007, 05:09 AM   #11
O.C.F.RIDER
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Originally Posted by DockingPilot


The only way your SE will wheelie is if someone else rides it !
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Old 06-07-2007, 05:11 AM   #12
O.C.F.RIDER
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Quote:
Originally Posted by Rock_93
Why would you have twisting of the forks because of only one rotor? Isn't there lots of bikes with only one rotor? I'm sure they can't all have a problem with twisting forks.
Just think about it and it will become clear. Simple physics.
Rally On!!
Chris
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KTM 950 Adv. "S"...'06 KTM 525 EXC...
'76 MV Agusta 750 America S...'84 Honda VF1000...
'75 Kawi 900 Z1...'90 Kawi ZX11...'03 Kawi ZRX 1200...'01 VOR 400E
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Old 06-07-2007, 05:16 AM   #13
DockingPilot
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Quote:
Originally Posted by docgonzo
Yeah, you should have left the "heavy" mufflers on the bike, the way the engineers meant it to be. Then, the balance would have been good.

By lightening the rear of the bike, as you have found out, you make the front heavier, effecting the steering balance that was carefully engineered into the bike. To say nothing of the jetting aggrevations. And the cost.

My SuperEnduro steers beautifully. And wheelies nicely. With the stock cans.
And furthermore:

Wern't you the one insisting those stock ballast tanks were made of titainium when you first bought it ? I remember, yes, "they are so light, KTM makes them out of titainium"

Doc, dont ever go on the witness stand, I'll have you speechless on the cross !
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Old 06-07-2007, 06:15 AM   #14
O.C.F.RIDER
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Quote:
Originally Posted by DockingPilot
And furthermore:

Wern't you the one insisting those stock ballast tanks were made of titainium when you first bought it ? I remember, yes, "they are so light, KTM makes them out of titainium"

Doc, dont ever go on the witness stand, I'll have you speechless on the cross !
Oh shit, come on, , oh God, STOP already, , my stomach hurts!!!!
Rally On!!!
Chris
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KTM 950 Adv. "S"...'06 KTM 525 EXC...
'76 MV Agusta 750 America S...'84 Honda VF1000...
'75 Kawi 900 Z1...'90 Kawi ZX11...'03 Kawi ZRX 1200...'01 VOR 400E
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Old 06-07-2007, 06:32 AM   #15
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Quote:
Originally Posted by O.C.F.RIDER
Oh shit, come on, , oh God, STOP already, , my stomach hurts!!!!
Rally On!!!
Chris
This is almost as funny as DanBrew calling himself a long distance GS type of rider and saying how a 950 doesn't get him "hard" compared to a GS . I think he got some and shit himself can't have that happen again so switch back to the GS where he won't get any, can't have those verticle brown stains anymore, the wife doesn't like washing them out of the underwear.
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