Author Topic: 400/4 Sunflower disc... :)  (Read 1627 times)

470four

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400/4 Sunflower disc... :)
« on: November 14, 2012, 11:08:43 AM »
Hi all,

Recently sold my Four of 22 years ownership, amongst all the spares I had accumulated was a drilled front disc? This fetched good money on ebay, two weeks later I had an email form a chap asking if the disc was still for sale?  Nope, sorry sold.

Ah...

Did it actually work any better?

Nope, didnt make a habit of riding my Four in the wet anyways, in the dry it was still very "challenged", a thick hard stainless disc with one barely adequate at best single piston caliper not being a match for modern traffic and their Proper Stoppers.  ;)

But - this did work.





Copied off a wavy-style Yam R1 cast iron racing disc, this gave very good wet weather stopping power, lightened up a very heavy disc and got the disc up to working temp very quickly!  At LAST, a good front brake! Various mods meant the bike was now faster than its frame and brakes, an improvement was gratefully received!

Could I do this to his disc?

Mmmmm let me get back to you with a price....

A price was agreed, and a few days later a disc arrived for me he'd bought online and sent straight to me - I went to work.  :)

Before:



After:



All good!  Mine passed its MOT for the last three years with no drama's, was always a good conversation point!

& no - Im not asking for permission.   ;)

Offline robnobrakes

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Re: 400/4 Sunflower disc... :)
« Reply #1 on: November 16, 2012, 04:11:14 AM »
and to finish the story, I'm the chap who is now looking forward to receiving it 8)

I'll report back on it's performance in the fullness of time :)

Got it  :)
« Last Edit: November 16, 2012, 11:34:50 AM by robnobrakes »
Rob

1977 400/4 (currently undergoing a cafe racer conversion)
1994 Ducati 900SS
1998 Triumph Tiger 900
1998 Honda VTR1000 track bike

Offline robnobrakes

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Re: 400/4 Sunflower disc... :)
« Reply #2 on: December 15, 2012, 11:47:44 AM »
Regarding weight loss the stock disc weighs 2.18 kg, the modified disc 1.800 kg, weight saving 0.380 kg  8)

This takes the total weight saving on my Cafe project to just over 16Kg so far :)
Rob

1977 400/4 (currently undergoing a cafe racer conversion)
1994 Ducati 900SS
1998 Triumph Tiger 900
1998 Honda VTR1000 track bike

 

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