Hmmmm.....ZTL 2 caliper weighs a whole 2lb more than the 6 pot it replaces.....which defeats the object of the ZTL ethos of minimum unsprung weight.

The 1125 is 20KG lighter and makes 53HP and 5ftlb of torque more than the XB, so probably a better brake is needed ?.......2lb in extra unsprung weight is a lot though, a conventional wheel and double disc set up would weigh around the same and be far more efficient

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

100%

I managed to cook my brake during a serious post running in blat on my favourite road, with fresh fluid and pads it's ok again - this may have been an assembly fault but the factory always uprates its brakes when they're going to be given some grief.
I'll admit, I've never liked the rim disc (good in theory though) and Erik himself has said it was only designed to as good as a conventional set up, NOT BETTER, as a lot of people seem to think.
Making the caliper heavier negates any advantage it MAY have had.

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If your dreams don't scare you, they are not big enough.

Before I went down the 8 pot caliper route with the XB I discussed with Matt at Trojan if they were still marketing their old conversion to "normal" brakes, regrettably they had stoped doing so but he gave me a lot of useful information on howthey had converted their race bikes to the twin front disc set up.

Although this would have been expensive it would have been interesting but becuase I was also looking at getting an 1125R at the time I went with the 8 pot for the XB to keep commonality between bikes.

The weight of the 8 pot caliper hanging off one fork leg does call all the benefits of the ZTL into question somewhat with regard to unpsrung weight.

Is an XB/1125 wheeel with disc light than a twin disc wheel I wonder.

Does one 8 pot caliper weigh less or more than a pair of normal calipers?

A lot more.....my tuber front wheel, together with twin discs and 6 pot calipers weighs less than the 1125 wheel with disc and 8 pot.......mine are PFM's though

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Well this all confirms my riding experience.............the 8 pot drops in turning right......a lot of weight on one side of the wheel.......bolts/disc/caliper.....I can live with it but its real!

I would go with this. My Aprilia RSV-R had a very expensive Brembo system and I do not recall it as better than my XB with the right pads. My bike will pull up as fast as anything I have ever had.

Also Aprilia OEM discs were £140 each and pads £40 a set. So £360 for a full change out. It is less than £200 on an XB even using OEM parts.

I thought about the 8 pot, thanks for the info DJ, but the cost is not for me. I might need that £500 to keep my Bik Razor on the road .

Although my 1125 will probably stop as quickly as my Ducati in a straight line, the Brembos have way more feel when banging them on before a bend and then progressively releasing them when tipped into the bend. Only one finger light touch needed instead of a hard, 4 finger tug on the Buell.

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If your dreams don't scare you, they are not big enough.

......and the Buell will cook its pads, warp the disc and boil/vapour lock its fluid pdq if ridden hard enough......and that's with the 6 pot

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Interesting. With the EBCs I can brake very hard with 2 fingers and use a one finger cover. Good feel as well. The GFs are not the same. But then again is can be about ride style, place, speed, etc.

And I do think the XB system is on a margin if you run them very hard.

6 pots on a kwak which I have a set of are the best brakes ive tested - though they are massive, the xb is no oil tanker at slowing up very good infact and I think if you weight up the cost / maintenence / design / weight of the ztl is much better and the usual brake design

To be honest I never had pad or rotor problems with either the XB with 8 pot of the 1125R, way discs, brake fluid changed every 6 months at least and the rotor cleaned quite regularly, I may have been lucky.

When I went to see the guys from the www.twinmotorcycles.nl shop they had an 1125 race bike there. They had swapped the front end for R1 forks, wheels and brakes. They said that before they had done the swap they had to change the front wheel (because of the disc) after every session on the track because it had cooked the disc and the pads. And that was with racing pads. So they just swapped it haven't had issues since. Though whether this is an issue for everyday riding is another question. I prefer the GSX-R setup on my X1 over the 6pot Buell caliper. Far more feel and no weird effects when braking when leant over.

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Illegitimi non carborundum

I would swap to the R1 front end but the credit crunch is limiting what I can spend on my toys at the moment.
The wavy disc and aftermarket pads will have to do for the foreseeable future