Thanks both. Dave: the wheels are original and not touched. Mike: If the brake discs do not resolve the issue I will be either throwing it at a specialist or trading it in! I now have in my possession brand new OE discs that have been kindly loaned. I'll be fitting them tomorrow at some point with the new pads. New discs and pads take a couple hundred miles to bed in properly so it's going to be a week before can confirm or not problem is resolved. The disks will now rule out everything on the front end as it's all new.
Ok that rules out that potential problem, Hopefully the new discs and pads will resolve the issue, seriously running out of options after that other than a fork issue, but I'm just not seeing being related so fingers crossed your be sorted
Its going to be interesting to know as my bike has a tremor/slight judder under hard braking but only happens occasionally. Sometimes the back wheel is off tje floor and its smooth as silk, sometimes im pulling into local cafe and it shows itself. Mine is still there after recent caliper change.
I would expect to have a judder if I was braking near the limit. At this point I would ease off then reapply the brake. You can't overcome physics.
This is more than a slight judder as it makes the fairing physically shake on track when braking hard but certainly not to point rear wheel is lifting. The borrowed brake discs are now installed with new pads and all aligned properly to service spec.
Patience!!! Been busy doing house chores all day so I'll be using it for work all week to bed the brakes in gently.
Well... 35 miles done so far ... no vibration... Early days yet as the discs / pads need to bed in properly (lever feels a little soft atm) but its looking promising.
So thinking out loud ... I'm 99% confident the alternative discs have resolved the issue. Although before counting my chickens I want to do some more miles probably till the end of the week and so it will be the weekend before can make any further decisions. Assuming it is the discs... and sending the existing Brembo ORO discs off to Brembo where I'm expecting them to say 'out of warranty'... do I: (keeping in mind the existing mods on the bike) - purchase OE discs (£200) - buy a new set of Brembo ORO discs (£270-ish) - buy a new set of Galfer discs (£290-ish) - buy a new set of Brembo T-drives (£550-ish) *gulp* Got to admit finding the T-drives difficult to swallow given the bike commutes in all weathers (I don't do salt) and given the ORO discs like to rust at the mere hint of water I'd get very annoyed spending that kind of cash to find the T-drives going brown... ... which obviously is due to the increased iron content in the discs which makes them so awesome... but for a mainly road bike? Overkill? (it gets tracked 4-5 times a year)
Early days but great news.... will be amazed if you get any joy from sending them back to Brembo but possibly worth a try. Personally unless your a trackdays addict I would stick to the OE discs, also you could price up rebuilding yours with new disc and bobbins against the price of replacements. By the sound of it you do some miles just commuting with perhaps the odd trackdays so OE discs are plenty capable without any hassles.
The braking performance from the ORO discs were excellent... I noticed a big improvement over the OE discs for sure which is why so reluctant to stick with them. It makes sense to do so though. Rebuilding could be an option.
Have a chat with Ian at Mode Performance, super helpful and pretty much experts in Brembo and high end equipment! Least you will have a figure to work with, then just way up the pro's and con's! I ran my GP's on OE discs for a while before changing out to the T-Drives... they definitely offer more feel and bite at the sharp end, but for just mainly road use I would have just kept the OE ones... the big plus for me was the price too...trade money plus a drink so it was a no brainier.
65 miles done ... still no vibration. Too early to pop the champagne? (Indicator has gone on piss now!)
Check disc run-out; could be from that or some deposits on the brake disc surface. If its only happening during braking and not normal riding then it is very likely to be something with the brake discs. Maybe someone didnt cool the brake disc down after a track day and held the front brake.
