T100 and geometry starting points? - Triumph Forum: Triumph Rat Motorcycle Forums
» Main Menu

Discussion Forums
 » Twins
 » Tiger
 » General
 » RAT

Features
 » Blogs

Motorcycle.com Links

Contribute
 » Photo

Motorcycle Forums
» Insurance
» Sponsors
» Our Partners
»ATV Reviews
»Motorcycle Games

Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

Reply
 
LinkBack Thread Tools Display Modes
Old 12-02-2012, 04:34 PM   #1 (permalink)
Senior Member
Supersport 600
Main Motorcycle: Bonneville T100 EFI
 
Join Date: Oct 2012
Location: here or there
Posts: 200
T100 and geometry starting points?

I have been asking around, reading, and PMing folks (thanks) but had a few items I hope folks assist me with clarity. Ultimately I'm looking at going 17" mag (yeah, yeah, Thruxton/SE), but had a few questions about suggested geometry.

-if I go to 18 spoke, will dropping the top tree be enough to 'readjust' rake and trail to a more stable geometry? Naturally this requires headlight relo, and possibly just going clip ons... oh wait, rearsets...

-will going to 17 mag require a different set of trees (not just for the wider mag width, but overall change in angle geometry). If this is true, will a Thruxton designed wheel (thinking Carrozzeria) set be fairly bolt-on with a Thrux fork set? And would a mag wheel Triumph set of trees be "correct?"

Mostly I think I'm hung up on what trees are optimal.

Any other thoughts? Points I'm missing, other ideas?
iomatic is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-03-2012, 09:26 AM   #2 (permalink)
Senior Member
Moto Grand Prix
Main Motorcycle: 2004 Thruxton
 
Join Date: Jan 2008
Location: Grand Rapids, Michigan
Posts: 2,719
Other Motorcycle: 1954 BMW R25/3
Extra Motorcycle: 1971 CB350
Quote:
Originally Posted by iomatic View Post
-if I go to 18 spoke, will dropping the top tree be enough to 'readjust' rake and trail to a more stable geometry? Naturally this requires headlight relo, and possibly just going clip ons... oh wait, rearsets...

-will going to 17 mag require a different set of trees (not just for the wider mag width, but overall change in angle geometry). If this is true, will a Thruxton designed wheel (thinking Carrozzeria) set be fairly bolt-on with a Thrux fork set? And would a mag wheel Triumph set of trees be "correct?"
Thruxton Wheel:
Since you currently have a 19" front wheel and are dropping the front height to 18", you'll want to *raise* the forks in the trees to restore geometry/add stability - not lower the tubes. That being said, I doubt that you would create an unstable ride by dropping the front 1/2" via the rim change...these bikes have pretty conservative rake & trail and actually like a little more aggressive stance.

Why would changing the front wheel require going to clip ons or rear sets?

Mag Wheel:
The triumph mag is of identical width as the spoked wheel hubs. Where the assembly goes awry is when swapping the T100 lower legs to the mag wheel lowers...these result in a narrower space available for the wheel assembly. The problem exists regardless of the mag front wheel you use.

If you were to go to a mag up front and keep your stock lower legs, then everything fits just fine, but now you need to figure out how to lower the front fender so it doesn't look like a dirt bike.

As far as the steering geometry is concerned, either front wheel will likely work fine with your machine without going to thruxton, scrambler, or F3 tubes in the forks provided you stick with the stock length rear shocks. Remember, thruxton/scrambler shocks are roughly an inch taller...without this extra height in back, lowering the front a little isn't going to totally destablize your machine. You may, however, miss the ground clearance.

I went clip ons over the tree on my thruxton without causing issue...so that overall geometry was roughly 1" taller in back and 1/2" lower in front than the your T100. No problemo on stablility, but I didn't like touching down more frequently in corners.

Regards,

--Rich
beemerrich is offline   Reply With Quote Quick reply to this message
Old 12-03-2012, 08:04 PM   #3 (permalink)
Senior Member
Supersport 600
Main Motorcycle: Bonneville T100 EFI
 
Join Date: Oct 2012
Location: here or there
Posts: 200
Thanks agan, Rich. I did mean raise the tubes, and also meaning I may as well relocate the ignition, clip-ons... move the rearsets, track days... You get the idea.

I'm eyeing some thruxton lowers so I think I'm halfway there, and now just need the triple trees, and perhaps a speedo drive that will be more suited for this application(?)

I think real clear shopping lists based on wheel size and style would be handy.

Again, many thanks for the clarity.

Last edited by iomatic; 12-03-2012 at 08:07 PM.
iomatic is offline   Reply With Quote Quick reply to this message
Old 12-05-2012, 07:37 PM   #4 (permalink)
Senior Member
Supersport 600
Main Motorcycle: Bonneville T100 EFI
 
Join Date: Oct 2012
Location: here or there
Posts: 200
Oh, and -- speedo for Bonneville/SE work best for this application and direct swap?

thx.
iomatic is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Attachement points for GoPro camera on T100? realmc26 Twins Talk 14 09-24-2012 12:33 AM
Can I swap 750 Points Plate for 650 Points? dirtball Maintenance & Workshop Talk 0 10-04-2011 11:39 PM
"offer" starting points??? the-ROOSTER- Sprint Forum 5 02-16-2010 01:42 PM
T100/SE frame geometry thekiwi Twins Technical Talk 7 02-15-2010 08:47 AM
T100. Good Points v Bad Points. UK Daveski Twins Technical Talk 13 08-15-2007 06:59 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 07:05 AM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Forum Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum Ninja H2 Forum Ducati Scrambler Forum Kawasaki Ninja 250SL Forum

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.