GSXR1000 K3 front wheel needed to borrow ...

[Deleted]

Anyone feeling the kindness to loan me a front wheel (With tyre / brakes) for a K3 Gixxer 1k ... I'm told a 600 / 750 K1-K3 may fit ?

I've picked up a judder at low speed braking and the forks & discs have been checked and ruled out. The Mech thinks the wheel may be damaged, and to rule that out I need to swap it for a know good one just to test.

I'm happy to put a cash deposit down and beer for the favour and hopefully its only going to be for a day or two.

[David]

Mar 24, 2017 18:06:14 GMT @rivercop said:

The Mech thinks the wheel may be damaged.

What does the mech. think might be damaged.

[nickw]

Try checking the float pins. I had exactly the same problem on my last blade and got a top tip from someone that used to be on here.

You'll need a nut and bolt with some washers. Put it through the float, tighten, but don't over tighten. Spray a load of brake cleaner on it and then turn it with a socket and ratchet until it moves freely. You'll need a fair bit of brake cleaner.... Repeat for all float bits... (Can't remember the official name of the floaty thing )

They get well crudded up and then the disc doesn't float properly. It's worth a try...

[David]

Mar 24, 2017 18:06:14 GMT @rivercop said:

The discs have been checked and ruled out.

[Deleted]

Yea. So the brakes were swapped out for a known good set and its still there. Had the head bearing replaced as they were going bad anyway. Still no joy. Forks and tyre look to be good. Mech says that it's either the wheel or the calipers that's causing it.

Don't wanna cough out hundreds for a wheel or calipers if its not them that's causing the judder.

[nickw]

Mar 24, 2017 20:26:31 GMT David said:

Mar 24, 2017 18:06:14 GMT @rivercop said:

The discs have been checked and ruled out.

So what's that all about David ? Discs could have been checked to make sure they're not warped.

All I've done is suggest a simple and quick check.... Still, we're not all blessed with your knowledge are we

[David]

Mar 24, 2017 22:29:47 GMT @rivercop said:

Mech. says that it's either the wheel or the calipers that's causing it.

Has the wheel been checked to be true & dynamically balanced, are the wheel bearings new, are the calipers fixed or floating.

[Deleted]

He checked the balance and its fine, there was a tiny bit of run off on the jig, but he said not enough to cause the judder. Bearings look new and the calipers are the last suspect if the wheel is OK.

[David]

Have the calipers been cleaned & pistons exercised to ensure smooth operation.

[Wheelnut]

Not too sure what swapping the wheel/brake assembly will tell you. It is likely to be something related to the front wheel so even if swapping it cures the issue you still won't know if it's wheel bearings, a buckle or a flat spot, the disks or the tyre.

[Deleted]

The brakes are fine. The tyre is fine. Bearings feel fine. If the wheel is swapped for a known good wheel / tyre and the problem stops, then I know the problem is with the wheel. If its still juddering then its something else. Just trying to narrow down the possible culprits before I spend money on replacing stuff that doesn't need replacing.

[David]

How about stripping the wheel (remove tyre & discs etc.), replace the bearings at £5 each, get the wheel checked for true, dynamically balance it & go from there.

[David]

How are you getting on with diagnosing the problem.

Whilst at NBT yesterday, the problem was discussed with Steve, he can dynamically balance wheels.

If you can't find anyone more locally who has the gear to do it, it might be worth a trip to Newton Aycliffe.

[Lee]

interesting one.
Discs have been swapped, wheel and steering head bearings have been checked and found fine.
The wheel has been checked and found to be true.

Try removing the calipers and working the caliper pots in and out on each side.
It normally takes me about an hour to properly free off caliper pots.
You'll need some small G clamps, plenty of brake cleaner, an old toothbrush, an artists paint brush and either red rubber grease or copper slip.

I'd clean up the pads too and make sure any glazing has been scuffed off the pads before refittting.
Be sure to rub down and grease the pad sliding pins also.

Slacken the front wheel axle and pinch bolts. Lower the bike onto its own weight.
Torque the axle and pinch bolts, THEN refit the calipers and torque them.
It's possible that the wheel has been nipped up previously whilst not under its own weight and this can cause a slight judder.
Also, try swapping the pads between calipers.
Remember to pull the front brake lever and make the pads contact the disc before rolling it out the garage!
You might also want to bleed them a little too.
This will rule out any judder caused by unequal pressure applied to the front pads whilst on the anchors

[Deleted]

Yea. Its just waiting inbetween the mech's other jobs to get sorted. Hate waiting.

Its frustrating having so many things that can cause a judder and no idea which it is.

Thanks for the info David ... I'll check him out. If the wheel isn't the problem, all the brake stuff you said is next Lee. I'm just not convinced it is the brakes as they work really well even when the judder appears. Doesn't feel like it's lacking if you know what I mean.

[Lee]

It's a simple enough procedure. I rake my calipers out at least once per year and normally do a spot of bleeding. Just 3 or 4 top ups in the reservoir. Which is probably around 50% of the fluid. It makes for a fluid conntent that's always pretty new whilst expelling any air present

[Retired rigworker]

Have you checked the fork bushes are ok ?. Get the front wheel off the ground and pull forward from the bottom ever so slightly you should feel no play at all.

[Deleted]

It passed all the bearing checks at the MOT ... The head bearing had some "notchyness" but I had them replaced just in case. All other bearings and bushes feel fine. No free play anywhere.

[greenman]

Mar 24, 2017 18:06:14 GMT @rivercop said:

Anyone feeling the kindness to loan me a front wheel (With tyre / brakes) for a K3 Gixxer 1k ... I'm told a 600 / 750 K1-K3 may fit ?

I've picked up a judder at low speed braking and the forks & discs have been checked and ruled out. The Mech thinks the wheel may be damaged, and to rule that out I need to swap it for a know good one just to test.

I'm happy to put a cash deposit down and beer for the favour and hopefully its only going to be for a day or two.

putting on a front wheel is more than just tightening the axle - did you do the "bounce" to ensure the fork legs are straight, if not this will cause the discs to be out of line and the fork legs,, if you think the wheel is damaged run it on the tyre balance machine, take the tyre off first , , when did the judder start before the new discs were fitted , or new wheel bearing fitted , known a gixxer 1000 ovall a front wheel because he was lifting the front up ,

[greenman]

Mar 24, 2017 19:30:35 GMT nickw said:

Try checking the float pins. I had exactly the same problem on my last blade and got a top tip from someone that used to be on here.

You'll need a nut and bolt with some washers. Put it through the float, tighten, but don't over tighten. Spray a load of brake cleaner on it and then turn it with a socket and ratchet until it moves freely. You'll need a fair bit of brake cleaner.... Repeat for all float bits... (Can't remember the official name of the floaty thing )

They get well crudded up and then the disc doesn't float properly. It's worth a try...

i thought it was that nick ,as it was juddering sticking pads ,just put new pins in mine , this is the video nick ,,, the word on the street is BOBBINS ,
,,,