Triumphrat

Rusk · 08-28-2006

I've read through countless posts on the forum, regarding a dual disc setup on Bonnevilles, T-100s and Thruxtons. Nothing comprehensive has yet been posted, nor any working possibilities, that I have found. So, does anyone have any idea as to how this could be accomplished. I'm not worried about USD forks or anything, as I understand that such an endeavor would require reinforcing the frame. Just looking for the basics.

Cheers

Thrux-ton-up · 08-28-2006

Rusk - dual disc - why? That would be my first question. If you've seen the Thruxton cup Racers - they fly just fine with a near stock single disc. Your NOT hauling a 150 HP, 190 MPH sport bike down from triple digit speeds. I have the BRAKING wave rotor, PreTech six piston caliper and EBC HH pads on the front and this provides extremely good stopping power for the Thruxton, very good brake feel, no fading, and one finger braking action. I have 4000 miles on this set-up now and it has really worked very well. I do all my riding on the twisty mountain roads of North GA and have no complaints with this set-up.

BUT if you have to go to dual disc - the easiest way may be to keep it in the Triumph family and swap the dual disc front end assembly right off the Thunderbird sport bike. JCW

Front set-up

BRAKING Wave on the rear and EBC HH pads also provide excellent stopping power.

thruxtonone · 08-28-2006

I have the same set up but with an EBC front rotor. Stopping power and modulation, for the speed capability, is as good as my YZF 1000.-T1

TBSstunta · 08-28-2006

Quote:

On 2006-08-28 03:48, Thrux-ton-up wrote:
BUT if you have to go to dual disc - the easiest way may be to keep it in the Triumph family and swap the dual disc front end assembly right off the Thunderbird sport bike.

Thruxton 41mm forks
TBS 43mm forks

Its possible the triple trees will bolt on, if no you could machine out your clamps to take the 43mm forks.

I agree about just upgrading the calliper.

Rusk · 08-28-2006

I've been looking for a TBS to salvage for the forks, but those bloody things are *rare*, at least around here. eBay only has 1 and that's the complete bike. Still, it's good to know that with the proper set-up, a single rotor is all that I need.

I've got a problematic desire for my forks. I want a Bonnie fender and dual discs on my Thrux. No reason, other than I think it'll look dead sexy.

[ This message was edited by: Rusk on 2006-08-28 09:07 ]

MickMaguire · 08-28-2006

It seems to me that the ansnwer could be in the cartridge forks that some of you use to upgrade the stock items. Was it CBR? If you use the complete forks then all you woudl need to do is find a wheel to fit. My suggestion there would be to have one laced up from a tiger or TBS hub (or use the TBS wheel). then you would need to find rotors to suit. Brake calipers would come from the fork donor. the final quandaries would be the speedo drive and fender.

An alternative for the forks might be to take aleaf from the old bonnie racers book and fit a left lower leg on the right so resulting in a leading caliper mount. It would no doublt require some machining for the bottom of the leg though.

Just some ideas. Personally I would be more likely to go with the upgraded single brake shown above. I dont think I would go the TBS front end route - not just as they are so very very rare (and expensive), but also as it woudl change the look of the bike dramaticly - making it look much heavier, and possibly out of proportion.

Thrux-ton-up · 08-28-2006

Honda front end - F2 to retain speedo drive on a bonneville. JCW

Ridge · 08-28-2006

That last one gives me a shiver everytime I see it.

Rusk · 08-28-2006

Quote:

On 2006-08-28 09:44, Thrux-ton-up wrote:
Honda front end - F2 to retain speedo drive on a bonneville. JCW

Hey, now! That would work! I wonder how difficult it would be to mate the Thrux hub to that, or would I need to have a new hub machined to preserve my spokes?

I notice that in just about every question thread, you have a solution with photos. Big T should hire you as their historian. :-D

thruxtonone · 08-28-2006

Anything is possible with a good machinist. Issue is getting the rotors and calipers lined up vertically and laterally.