Brake disk question

[dirtyfathobo]

Hey all, just curious what mileage have people changed their brake disks at or even if they have changed them at all yet, I'm trying to figure out if my local Honda dealer is trying to pull the wool over my eyes or not because I've been given mixed answers and they are notorious for trying to charge for extras that aren't needed, a perfect example of this is trying to charge me a high price for bearing parts stating "we have to order directly from Honda Germany (I'm in the UK) as no other dealers do them locally" so I found a local Honda distributer for parts here in the UK and ordered the parts for a fraction of the price which they didn't seem to appreciate when I had them fitted

Ok, so, I ride a 2015 Forza that's only had one owner before me and he kept it in immaculate condition with full history, I got the bike at about 18600 miles on the clock about a year or so ago, I've just hit 21600 and had it serviced. Faults that came back were a warning on my brake disks (not the pads though) saying they are heavily worn and need changing asap. My problem is this, I've taken it to my mechanic friend who says it's weird to hear they they have said that and he reckons I've got a good range of miles left on the disks (He's a car mechanic but rides bikes himself otherwise I'd pay him to do the bike but he doesn't have the right gear)

I'm taking it for a second opinion to a smaller bike garage to see if he mentions it and if he doesn't then ask his opinion (I mainly took it to Honda cause they apparently know Honda bikes where as this one is more for choppers and not scooters), I'd rather be spending money on a second opinion that the price for new disks especially if they aren't needed, if they are then I guess it's just another expense

My bike is still kept in immaculate condition and cleaned and maintained each week and never had this problem with previous bikes regarding disks.

TLDR; Anyway, what mileage have people changed their disks at if they have had to?

[you you]

Hey all, just curious what mileage have people changed their brake disks at or even if they have changed them at all yet, I'm trying to figure out if my local Honda dealer is trying to pull the wool over my eyes or not because I've been given mixed answers and they are notorious for trying to charge for extras that aren't needed, a perfect example of this is trying to charge me a high price for bearing parts stating "we have to order directly from Honda Germany (I'm in the UK) as no other dealers do them locally" so I found a local Honda distributer for parts here in the UK and ordered the parts for a fraction of the price which they didn't seem to appreciate when I had them fitted

Ok, so, I ride a 2015 Forza that's only had one owner before me and he kept it in immaculate condition with full history, I got the bike at about 18600 miles on the clock about a year or so ago, I've just hit 21600 and had it serviced. Faults that came back were a warning on my brake disks (not the pads though) saying they are heavily worn and need changing asap. My problem is this, I've taken it to my mechanic friend who says it's weird to hear they they have said that and he reckons I've got a good range of miles left on the disks (He's a car mechanic but rides bikes himself otherwise I'd pay him to do the bike but he doesn't have the right gear)

I'm taking it for a second opinion to a smaller bike garage to see if he mentions it and if he doesn't then ask his opinion (I mainly took it to Honda cause they apparently know Honda bikes where as this one is more for choppers and not scooters), I'd rather be spending money on a second opinion that the price for new disks especially if they aren't needed, if they are then I guess it's just another expense

My bike is still kept in immaculate condition and cleaned and maintained each week and never had this problem with previous bikes regarding disks.

TLDR; Anyway, what mileage have people changed their disks at if they have had to?

Perhaps post a picture of the disks?

[gn2]

Discs shouldn't be worn out at that mileage but its possible the discs could have been damaged.
Impossible to tell without a visual inspection.
New discs without pads rings alarm bells though, new discs should get new pads.
I would avoid main Honda dealers like plague, find a good well recommended independent.

[E. Foster Salsbury]

Front disc service limit is 4mm and the rear is 5mm. Warpage service limit is the same for both at 0.3mm. The other reason to change a disc is if there is deep grooves because you were to late changing the pads and ran steel on steel.

Ask the dealer what their numbers were and then measure them yourself (or your mechanic friend) to see if the dealer is lying to you.

[E. Foster Salsbury]

Oops. Just saw this is in the Forza 125 forum. The specs I gave are for the '14-'16 Forza 300.

[40jack]

Well I'll tell you one thing... My 2017 with only 8k on the clock, I looked at the front disk and it's got bad pitting on the surface. I'll be changing both front and rear disks and pads for Malossi kit. I'm not taking any chances on my brakes.

[gn2]

What makes you think Malossi discs will be any better?
The ones you have are probably fine, can you post photos?

[you you]

Well I'll tell you one thing... My 2017 with only 8k on the clock, I looked at the front disk and it's got bad pitting on the surface. I'll be changing both front and rear disks and pads for Malossi kit. I'm not taking any chances on my brakes.

Pitting is generally corrosion not wear.

[40jack]

What makes you think Malossi discs will be any better?
The ones you have are probably fine, can you post photos?

Thicker disk, made from better materials, with race pads for better stopping power.

[40jack]

Well I'll tell you one thing... My 2017 with only 8k on the clock, I looked at the front disk and it's got bad pitting on the surface. I'll be changing both front and rear disks and pads for Malossi kit. I'm not taking any chances on my brakes.

Pitting is generally corrosion not wear.

Well regardless its still a break in contact surface area. It's probably over kill but Like I said when it comes to safety on a motor bike you can't have too good a brakes.

[gn2]

Well regardless its still a break in contact surface area. It's probably over kill but Like I said when it comes to safety on a motor bike you can't have too good a brakes.

You do know that the limiting factor in braking is the contact between tyre and road?
ABS makes best use of the available friction.
The brake only needs to be powerful enough to activate the ABS on a good dry road surface, anything more is pointless.

[easyrider]

The price you would pay for reinspection is probably the cost of a new disc.. If you have doubts its worth the price for a new disc.. its doubtful however that your discs are serious cause for concern.. But new is peace of mind..just do it yourself and save ..Always add new pads for best results and wear in .

[40jack]

Well regardless its still a break in contact surface area. It's probably over kill but Like I said when it comes to safety on a motor bike you can't have too good a brakes.

You do know that the limiting factor in braking is the contact between tyre and road?
ABS makes best use of the available friction.
The brake only needs to be powerful enough to activate the ABS on a good dry road surface, anything more is pointless.

You make a fair point and like I said it's probably over kill but I feel it might improve braking quality... I'll let y'all know when I fit them.

[40jack]

What makes you think Malossi discs will be any better?
The ones you have are probably fine, can you post photos?

I've taken some pictures but not sure how to get them in here.

[40jack]

[img]Front%20brake%20disk%20pitting.%20https://imgur.com/gallery/3wvBfLv[/img]

[40jack]

Front brake disk pitting. https://imgur ... ry/3wvBfLv

[gn2]

That does look pretty bad, particularly the chunk missing at the hole, I would replace that.

[40jack]

That does look pretty bad, particularly the chunk missing at the hole, I would replace that.

Looks like it's delaminating... Strange though on a bike that's done 8k