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Author Topic: 640 LC4 front wheel help  (Read 437 times)

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Offline Dolf

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640 LC4 front wheel help
« on: March 10, 2019, 10:58:37 am »
Took the front wheel off but now the left rotor is touching the caliper. Spacers are all in correct from what I can tell. What am I doing wrong?
 

Offline Kobus Myburgh

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Re: 640 LC4 front wheel help
« Reply #1 on: March 10, 2019, 02:39:12 pm »
Did you pump your forks prior to locking your pinch bolts?  This will center your forks.  If you’ve inserted your wheel collars correctly, this is the only thing that I can think of that might possibly cause this.
"If you have men who will only come if they know there is a good road, I don't want them.  I want men who will come if there is no road at all."

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Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #2 on: March 10, 2019, 04:33:49 pm »
Thanks. Just tried that but no luck.
 

Offline Kobus Myburgh

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Re: 640 LC4 front wheel help
« Reply #3 on: March 10, 2019, 06:10:36 pm »
Have you not got the wheel collars/bushings the wrong way round.  I THINK the one is longer than the other, i.e. left and right side.

Do you have a manual to verify this?


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« Last Edit: March 10, 2019, 06:18:03 pm by Kobus Myburgh »
"If you have men who will only come if they know there is a good road, I don't want them.  I want men who will come if there is no road at all."

-David Livingstone-
 

Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #4 on: March 10, 2019, 06:40:49 pm »
Don't think so. I checked that everything is in correctly from here:
https://www.partsfish.com/oemparts/a/ktm/524b7f79f8700231ac496f30/front-wheel
 

Offline Kobus Myburgh

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Re: 640 LC4 front wheel help
« Reply #5 on: March 10, 2019, 09:12:34 pm »



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"If you have men who will only come if they know there is a good road, I don't want them.  I want men who will come if there is no road at all."

-David Livingstone-
 

Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #6 on: March 11, 2019, 06:38:46 am »
Did exactly all of that.

There must be something I'm missing. Anyone in the Weltevreden Park area that want to come help me? I'll pay with beer.
 

Offline BuRP

Re: 640 LC4 front wheel help
« Reply #7 on: March 11, 2019, 12:05:50 pm »
Pic 3, the hazyish one - that alu plate in which the calliper sits, isn't that thing bent?
Looks like it, shit pic though.
Dunno this bike but front brakes take hits at times so....
Sparta MC50, 46 other 50cc's, Garelli Tiger Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701 Enduro, KTM 790 Adv R, KTM 2020 XC-W TPI 300 Six Days, KTM 790 Adv R Rally ordered
 

Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #8 on: March 11, 2019, 01:50:33 pm »
Nope, looks Ok.

Thing is, it was fine before I took the wheel off  :biggrin:

So it must be me doing it wrong......
 

Offline Dirt Junkie

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Re: 640 LC4 front wheel help
« Reply #9 on: March 11, 2019, 02:12:42 pm »
Try taking the one caliper off, then fasten the wheel and then refit the caliper, everything might align again once the wheel is in and fastened
Something to think about...
When you complain, you make yourself a victim. Leave the situation, change the situation, or accept your it. All else is madness.

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Offline WP

Re: 640 LC4 front wheel help
« Reply #10 on: March 11, 2019, 03:46:41 pm »
I had the same on one of my previous 990's.

So the shaft which insert through the forks and the wheelhub tends to have bur on the side which doesn't take the nut (if that makes sense) this is usually due to people tapping it in with a hammer or whatever creating a slight burr(I lightly filed off the edge to get rid of the burr), make sure that the shaft sits slighty inside the right hand fork (if that makes sense) and not flush with it. It is supposed to sit slightly inside as per the pictures from the manual posted above.

I hope this makes sense and that it helps.
 

Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #11 on: March 11, 2019, 05:43:34 pm »
I had the same on one of my previous 990's.

So the shaft which insert through the forks and the wheelhub tends to have bur on the side which doesn't take the nut (if that makes sense) this is usually due to people tapping it in with a hammer or whatever creating a slight burr(I lightly filed off the edge to get rid of the burr), make sure that the shaft sits slighty inside the right hand fork (if that makes sense) and not flush with it. It is supposed to sit slightly inside as per the pictures from the manual posted above.

I hope this makes sense and that it helps.

Aha, I think you may be on to something. Mine sits almost flush with the fork sticking out just slightly - probably about 0.5mm. Will give that a try tomorrow.
 

Offline BuRP

Re: 640 LC4 front wheel help
« Reply #12 on: March 12, 2019, 12:41:24 pm »
Actually it's very easy - if the bike has wheelshaft-clamps on both forklegs.
This is best done with new brake pads, they're thickest hence will push/locate the callipers best. On this, make sure first that they slide well on their sliding pins.
Undo axle clamps on both sides, move the wheel to the middle by using small wedges between disk & callipers (Edited: on either side!), shake the suspension up&down, re-check alignment and then nip the clamps... finished!
Got an uncle called Bob perhaps?  :P
« Last Edit: March 12, 2019, 01:41:09 pm by BuRP »
Sparta MC50, 46 other 50cc's, Garelli Tiger Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701 Enduro, KTM 790 Adv R, KTM 2020 XC-W TPI 300 Six Days, KTM 790 Adv R Rally ordered
 

Offline Dolf

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Re: 640 LC4 front wheel help
« Reply #13 on: March 13, 2019, 06:44:02 am »
I had the same on one of my previous 990's.

So the shaft which insert through the forks and the wheelhub tends to have bur on the side which doesn't take the nut (if that makes sense) this is usually due to people tapping it in with a hammer or whatever creating a slight burr(I lightly filed off the edge to get rid of the burr), make sure that the shaft sits slighty inside the right hand fork (if that makes sense) and not flush with it. It is supposed to sit slightly inside as per the pictures from the manual posted above.

I hope this makes sense and that it helps.

It worked. Was exactly this issue. Thanks!
 

Offline WP

Re: 640 LC4 front wheel help
« Reply #14 on: March 14, 2019, 09:58:03 am »
I had the same on one of my previous 990's.

So the shaft which insert through the forks and the wheelhub tends to have bur on the side which doesn't take the nut (if that makes sense) this is usually due to people tapping it in with a hammer or whatever creating a slight burr(I lightly filed off the edge to get rid of the burr), make sure that the shaft sits slighty inside the right hand fork (if that makes sense) and not flush with it. It is supposed to sit slightly inside as per the pictures from the manual posted above.

I hope this makes sense and that it helps.

Happy to hear!

It worked. Was exactly this issue. Thanks!