brake disk

[new kid on the block]

hi need some advice for a good set of front disks as i think the ones on my cbr 600 ,1999 are warped but have seen ppl say about cleaning up the bobbins . and i also have a nasty flat spot up to about 4500 rpm . i have only just got this bike and know nothing about its history all advise welcome .
thanks

[Reid]

For brake discs, either get OEM or a trusted aftermarket brand like EBC/Brembo. Wavey's might look but if they're cheap Chinese crap you'll only ever regret it. Poor performance and will warp super-quick.

Flat spot could be anything to do with fueling. Clean/replace the air filter, clean the carbs.

[DrDonnyBrago]

To clean the disc rivets/bobbins, get a big nut and bolt (I think I used an m12) slot the bolt through the hole and tighten the nut.

When it is tight, spray brake cleaner around the hole and turn the bolt with a spanner - it'll turn the rivet/bobbin and allow the brake cleaner to penetrate and loosen the shite off.

Repeat until they are all done. It is also worth checking for corrosion on the wheel hub - remove the wheel, remove the discs and have a look for white powdery chunks that could be pushing the disc off centre - check both the disc and the wheel. Clean them up if need be and reinstall the discs.

Chances are though that they are warped because the front brakes are/still are binding which will require a bit of brake maintenance to sort.

The flat spot is probably a fuelling issue as a result of a non standard airfilter/exhaust/endcan. If this is the case, the solution is to have a jet kit fitted and the fuelling adjusted to suit.

[new kid on the block]

has got standered can on it when its cold it seems to run ok buy once warmed up it starts to mess about when below 5000 rpm ? any ideas as onky juat got the bike and funds low to get it looked at so all ideas helpfull