Front wheel judder when braking around 60+

[Etherion]

Hi all,

I'm slightly at a loss with a problem my girlfriend is experiencing on her rvf.

The front end judders when braking medium to hard at speeds over 60mph. Doesn't happen when slower than that.

We had the brake pads and hoses changed and had the headstock bearings changed but it still happens.

What else can it be? I don't want to buy disks and find its not that and then spend money on anything and find out it could be something totally different.

My girlfriend has her first track day coming this sunday and would prefer it could be resolved before then so any suggestions appreciated.

Thanks

[Deviant400]

wheel bearings maybe

[Micro Monkey]

Could be several things really.

Headbearings, Wheel Bearings, Warped Discs, Front Wheel Out Of Allignment, Wheel Needs Balancing, Suspension Needs Adjusting. Probably best to try and get the front wheel off the ground and check one by one.

[Etherion]

Headbearings were just changed so should be able to rule that one out.

I got an abba stand so i can get the front wheel off, but how would i test to see what is causing the problem?

ie, how to test if wheel bearings, warped disc or wheel needs balancing etc?

Thanks

[yamahaha]

fork bushes definetely had this on my yzf 750 even a little bit of play on usd forks gives this symtom i think my yzf was owned by the wheelie king of japan before i owned it cause when i took it back from where i bought it from they informed me the fork upper had ovaled no amount of new bushes would fix it .....................i sold said bike two months later
take wheel out and feel each fork leg if there is play even a little i would bet my bottom dollar this is causing the judder my yzf only did it over 70 mph ....was scary but it was ok if you braked hard just if you were trailing the brakes it juddered all the time .......................

[Micro Monkey]

I have sent you some things to try etherion. Has wrked for me in the past, had terrible trouble with the ap brakes dragging on the yzf.

[CMSMJ1]

I'd looking at the discs...

get something adn blu tac it to the fork leg - spon the wheel adn see if there is any warpage..

I have some to bin after having the exact same issues...

[Etherion]

If the discs are warped or say if only one side is warped, do I still have to change both sides?

and if I do, what discs are good enough for track days and general use? Are the OEm good or the armstrong ones on ebay any good?

Last thing my gf needs is to fear squeezing the brakes and it IS nerve whacking

[Malc]

I agree with CMSMJ1 - had same issues and same problem.

Personally, I can't see past OEM discs IF the price is right, but others are generally as good.

[CMSMJ1]

I bought some EBC discs for half price - they have a deal on....