Replacement Front Disc

[nigelmthomas]

Hi all i have been to this url http://www.takkatakka.co.uk/bike2.html
and found a picture of a ducati brake on a 3 1/2 .
as my brake is old and with not to much chrome left, putting your foot down makes you stop faster.
anyone any idea which duke it comes from????
looks 600ss ish to me
Nigel

[sheddweller]

I think you will find this disc is either off the rear of of an early 90's 600to 900ss or off the front of a 85-87 F1 750.
It needs to be 260 diameter with 25mm offset. The front on the ss's were 320 from memory. I have fitted one of these to my 350 sport, but it's not on the road yet. It has an alloy centre and feels considerably lighter than the original.

[Brett]

Hi Sheddweller,

I notice your an aussie in the Sunshine state, what year model 350 Sport do you have?

I am down in NSW Port Macquarie.

Cheers

Brett

[hendre]

Hi all i have been to this url http://www.takkatakka.co.uk/bike2.html
and found a picture of a ducati brake on a 3 1/2 .
as my brake is old and with not to much chrome left, putting your foot down makes you stop faster.
anyone any idea which duke it comes from????
looks 600ss ish to me
Nigel

It is a EBC Pantah disk, they are have similar disks front and rear. You can but 'm in the US pretty cheap but I'll have to have a look in my mailbox at home to see where exactly

[hendre]

http://www.speedaddictcycles.com/produc ... 657LS.html
US$203, the cheapest option I could find

[Ned]

I was down at NLM a few weeks ago and I'm sure Alex said that they'd had some made. Ninety quid springs to mind?

[nigelmthomas]

i bit the bullet and bought a new one from NLM.
oh the pain, the pain.
in my wallet.
N

[EVguru]

i bit the bullet and bought a new one from NLM.

Be very careful whilst you're running the new NLM disc in.

Too hard a pad will damage the surface, but it seems that the Newfren pads can be too soft.

Particularly in the wet, you can pick up dirt and grit that becomes embedded in the pad and can then score the new chrome.

I've got a pair of NOS discs on the shelf and the finish appears to be finer that the ones Grimeca re-manufactured for NLM and this might be aggravating the problem. Perhaps poilishing the disc surface before use might help.

[3potjohn]

I had Newfren pads in my rear disc and replaced them with Ferodo pads.In no time metal swarf appeared under braking.My rear disc is a bit scored.I put the old ones in again but my tame MOT man just gave me an advisory that they were worn down.( They wern't but there you go.)

[peterc]

Could anyone who has changed to an EBC brake disc rotor comment on any difference in braking performance please? Thinking particularly if you have changed just the disc and are still using the Grimeca Master Cylinder and Caliper

[AndrewW]

The bike with the floating disk shown is my 350. It's a rear disk from (I think) a Ducati 600TL and came from Roy Thursby in Stockton on Tees.

My braking system is the original Grimeca caliper and a Grimeca master cylinder from a Morini 250 which is abetter match to the single caliper - the 350 one works well with double disks.

Before I fitted the 250 master cylinder, the floating disk gave a noticeable improvement in feel but not a lot more braking power. With the better matched master cylinder the braking is transformed and quite capable of locking the front up. A really good mod, worth doing. I had previously fitted a new OE disk to my 350 and NLM's recommended pads and even with careful 'running in' the new disk had scored badly within a couple of years. No problems with the floating disk - fit and forget.

[peterc]

Above comments much appreciated, Andrew, exactly what I was hoping to hear from someone who has done this mod. I have also changed to the 250 Master Cylinder, with some improvement over the very 'wooden' feel to the original set up, but am still convinced braking can be improved. From your experience it looks like the floating disc is well worth looking at, particularly when the Grimeca chromed item gets past its useful life as mine is.
Thanks again.
Peter

[AndrewW]

Glad to help. The only negative thing with the floating disk is that you have to cut the pads down as they foul the disc buttons otherwise. I've not found a pad that fits without being modified but Roy Thursby supplies modded pads at a reasonable price.

[EVguru]

Simply cutting down the pads will help the braking!

The braking torque depends on a number of factors, line pressure, friction coefficient, etc. One of the factors is the average radius of the swept area on the disc.

Cutting down the inner radius of the pad increases the average radius!

[AndrewW]

OK, thanks that's useful information. So to rephrase; the only hassle is that you have to cut down the pads.