What Is Wrong...??

And a few tubes of this to stop the engine casings rotting
https://www.amazon.co.uk/Autosol-Chrome-Polish-Aluminium-Cleaner/dp/B0079JWF94

 

2016 launch. The T100 has same frame, 900cc engine, single front disc. Street Twin, Street Scrambler and Street Cup all share the same engine as the T100 but in lighter frames. The new Bobber Black has the 1200 engine and twin discs, as does the new Streetmaster. Click the link.
http://www.triumphmotorcycles.co.uk/motorcycles/classics

 

Fit a Pretech six pot caliper. It will stop you just as well as twin disc setup.
Twin discs will involve new forks capable of mounting twin calipers. A new front wheel with a hub that supports twin discs, twin hydraulic lines etc etc etc ......
Just buy the T120......... it will be cheaper.
Be lucky

 

Hi Robert, in terms of new bikes you won't find what you are looking for with carbs. Everything is injection nowadays.

 

Single disc is adequate on the older 865cc Bonneville. Especially if you do a cheap upgrade to a 3 pot caliper from a Honda CBR 1000 or similar - they bolt straight on.

 

I completely agree. I think there is a lot of urban myth about the standard single disc set up being ‘inadequate’. I have never felt mine lacked stopping power and I have organic pads which lack bite but provide better feel. I have an alternative theory about limp wrists!

 

I have read that a twin disc brake setup is strictly for stopping brake fade, not increased braking ability. I couldn't agree more!

 

EURO 4 the killer of carbs

 

Tend to disagree with that! Bonneville is a big old lump to stop
The OEM fitment barely does it, a better 3 pot or Pretech 6 pot is the way to go.
Once either is fitted you will wonder how you stopped safely without them!

 

Two discs greater surface area = better braking performance!
Does brake fade happen with modern pads?

 

I was just repeating something I had read, years ago. There have certainly been many tech changes since. I do agree with the more surface area line of thought. But, as I am not after high performance, My scrambler stops just fine for me. I just picked up a 2006 model and love it to death. Ride safe brothers!

 

For my money the initial grab is offset by the greater unsprung weight penalty but the true limiting factor is front tyre adhesion.
The simple fact of it (my opinion! ) is that a sports bike on 17” alloys with sticky rubber and more sophisticated suspension can cope with braking forces that get a Bonnie badly out of shape. I have yet to encounter a real world situation when the brake alone has caused me heart flutter! I think the current vogue for twin discs on modern classics has more to do with ‘read across’ than because anyone ever thought a 74 Bonnie (admittedly lighter) was underbraked with its single Lockheed.
I leave the final words to the late, lamented Kevin Ash from 2009 “The brakes have improved since the first model and now demand less of a squeeze of the lever. The feel is not bad and the single disc offers sufficient power. In fact, it’s an ideal set-up for many of the Bonnie’s potential riders.”