FZR disc and rotor assembly

[stunz]

Vehicles cost money. 5000k out of a tire on a 250 seems pretty quick. Try another brand of tyre & check them for low pressure. Many people run them too low. Measure them.

Yep, always keep my eye on tyre pressures, keeping them to optimum. (even have a foot pump in the tank bag to adjust as necessary) and I use a harder compound tyre because its *supposed* to last a little longer for the type of riding I do. Hard, but not so fast...(I mean, geez, it is only a fizzer...)

Could be I'm just too fat, err, heavy...and thats whats causing the tyre wear. I also like to lean it over occasionally and that could be another contributing factor...

The thing is, I have tried medium, soft and hard compunds, but all wear out as quick as each other. Don't really have an opinion on brands, but usually go for the Pirelli. Maybe I just need to try a different kind of bike: alter my riding style.... maybe get myself a Vigaro or something, where leaning over 5 deg off centre will cause the pegs, exhaust and oilpan to scrape the blacktop...and ultimately take away the reason for riding a bike in the first place eh?...

[stunz]

A WoF is a non intrusive visual inpection,a service is in depth maintanence,but not a safety or compliance test...

Agreed, a wof is only to see if the vehicle is fit to be on the road.
You'd think, however, that regular servicing would pick up severe safety issues? My last service showed new head stock bearings required, (maybe as a direct result of the bad disc?) but no mention of the disc itself. I know you can get full on, thousand dollar + service jobs that replace nearly everything that can be replaced, but for the good ol kiwi "have a squizz and tell me what needs fixing NOW" service, a warped front disc should have been picked up straight off the bat...considering it is the primary stopping mechanism of the bike.
Oh well, you live and learn...

[vifferman]

What about that outfit in Waihi that advertise brake disks on TradeMe? Anyone here try them for new disks? Their prices seem reasonable.

[stunz]

Apparently, a Ducati 750 disc and rotor will fit...factory version is cheaper by $300 over the Yamaha factory version. $750!!! Either way, my riding days are over for the next couple of weeks...
I hate trains...

[F5 Dave]

There have been a couple of Kiwi companies that have made discs, I don’t know of any that have been any chop though, but would be happy to hear of good results from someone who has had some with reasonable mileage & they are still straight.

I had a friend investigate the correct material to use & import some at great expense (using plate steel is easy but it tends to warp no matter how it is cut. His theory is it is different densities throughout; thus heats at different rates,= warps). Sadly he closed up his shop & got a job so I don’t know that any where really made or how successfully.

Still think 5000k is bugger all wear for a 250. I typically get 6-8000k rears on my 750 & that is only sport ridden & tyres replaced at the legal stage. Think the MEZ3s lasted the longest, though the Pilot Sports look every bit as good (just as they are being phased out). Usually run at 2.3 & 2.5 bar. Any lower & you will wear tyres quickly.

[F5 Dave]

Apparently, a Ducati 750 disc and rotor will fit...factory version is cheaper by $300 over the Yamaha factory version. $750!!! Either way, my riding days are over for the next couple of weeks...
I hate trains...

I have just got ducati rotors for my 750. They are 320mm. Here is a list of the Ducatis they fit. Depending on your model I suspect yours are only 290 or 300.


350SS 1991-1997
600SS 1994-1999
M600 / M620ie 1994-2004
620S 2003-2004
748 SP / SPS / Biposto 1995-2003
750SS 1994-1998
750SSie 1999-2002
M750 / M750ie 1997-2002
M800 2003-2004
800S / 800SS 2003-2004
851 / 888
900SS 1991-1997
900SSie 1998-2002
M900 / M900ie 1993-2002
916 SP / Biposto 1994-2001
996 SP / Biposto 1999-2002
ST2 / ST4 / ST4S 1997-2004
M1000 2003-2004
1000SS 2003-2004

What wreckers have you tried?

[curious george]

FWIW, I have ordered from the guy in Waih, seemed really good to deal with, and happy to help.
I get mine hopefully by the end of the week, so I'l let you know...
The contact information I have is:
Graham Cornes
FGB
POwer Motorcycles
Waihi
021 616295

[Kickaha]

I had a friend investigate the correct material to use & import some at great expense (using plate steel is easy but it tends to warp no matter how it is cut. His theory is it is different densities throughout; thus heats at different rates,= warps). Sadly he closed up his shop & got a job so I don’t know that any where really made or how successfully.

We've had a few discs made in different materials,we get them lasercut and surface ground to clean them up

At the moment we have some made from what we were told was a surgical grade of stainless steel on a CBX550 pre 82 bike,these have done a full season and show no signs of warping,the bike won the local championship and gets ridden hard.

We've also got some made from mild steel on the front of a KDX200 and rear of a Ducati 400 and have also used these on a 250 Superkart,neither the KDX or Ducati have done enough work yet to see how they will last but they work well enough,the Superkart discs last one season and we toss them as they dish to much to be reground without making them to thin

[F5 Dave]

Enjoyed my old CBX.

Sounds interesting, What do you estimate it cost by the time it’s all done?

Generally stainless isn’t supposed to be near as good as the more ferrous compounds frictionwise. My PFMs go orange in between rides. With modern sintered compounds perhaps this is not such an issue?

Hardly worth doing one for the KDX I would have thought, I was surprised how cheap they are. I got one either side for mine, think they were motomaster or some some such silly name & they were very reasonable & had no problems with them.

[Kickaha]

Enjoyed my old CBX.

Sounds interesting, What do you estimate it cost by the time it’s all done?

Generally stainless isn’t supposed to be near as good as the more ferrous compounds frictionwise. My PFMs go orange in between rides. With modern sintered compounds perhaps this is not such an issue?

Hardly worth doing one for the KDX I would have thought, I was surprised how cheap they are. I got one either side for mine, think they were motomaster or some some such silly name & they were very reasonable & had no problems with them.

I estimate the cost to be absolutely zero,having friends in that industry thats the only reason we did the KDX discs

Not sure what compound pads (ferodo)Neil runs in the CBX but they work well

We were told meonite is the stuff to use,but we haven't tried sourcing it and know nothing about it.

[stunz]

FWIW, I have ordered from the guy in Waihi, seemed really good to deal with, and happy to help.
I get mine hopefully by the end of the week, so I'l let you know...

Thanks, I've not actually had a lot of time to go looking for the replacement part over the last couple of days and now the bike is parked up cos the jitters at the front do appear to be more pronounced now...(just my imagination? or not?)
Even considering selling the fizzer, right on the start of the good weather too, and that sux.