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

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Old 07-30-2008, 10:07 PM   #1 (permalink)
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Thumbs up Great source of info - Links to maintenance, tuning, modifications and so on

MODERATOR NOTE:

This sticky is posted to provide an easy means to scan for frequently required "how to" information. Links to threads containing info on modifications, tuning, maintenance and so on can be posted here.

Posts will be continually consolidated to keep the thread easy to scan, so do not be offended if your actual post is deleted, the link will have been copied to another post in the thread.

Also, no comments please. These will be removed. Thanks and best wishes!

To start, a collection of info gathered by Keef:

http://www.triumphrat.net/blogs/twin...-mod-links-35/

Twins documentation library general link:

http://www.triumphrat.net/blogs/twin...ion-library-7/

Triumph Owners Manuals:

http://www.triumph.co.uk/uk/Handbooks.aspx

Last edited by propforward; 12-17-2008 at 09:08 AM.
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Old 08-14-2008, 04:06 PM   #2 (permalink)
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Air / Fuel gauge installation plus Carb Tuning

Great source of info for anyone considering tuning their bike. The first threads by Ventura:

A/F gauge Install:

http://www.triumphrat.net/twins-tech...e-install.html

Data:

http://www.triumphrat.net/twins-tech...e-results.html



This thread by Kframe, includes A/F gauge installation details and data:

http://www.triumphrat.net/twins-tech...with-data.html



Hoopla (Bonniebobs) original thread, that started it all:

http://www.triumphrat.net/twins-tech...tio-gauge.html


General info on how carbs work, and tuning

Paulc's how to replace carb jets, needles and springs thread

keihin carb general info

Jenks Bolts Tuning Guide

Pat Dinquas Rejet Guide

Pics of How Jets Fit

Main and Pilot Jet settings for different mods

Carb Tuning Guide

Discussion on rejetting carbs, and overcoming the difficulties therein

Pilot jet and mixture screw setting


Carburettors

Carburettor Discussion

Dynojet vs Thrux needle comparison

FCR39 carb tuning / setup

FCR 39 overview and review
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Last edited by propforward; 04-22-2009 at 08:27 AM. Reason: Added General Tuning Info
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Old 08-14-2008, 04:37 PM   #3 (permalink)
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Links to Oil Discussions and info

TriumphRAT threads on oil - lots of discussion, some of the threads have external links that are of interest. Hopefully this makes the discussion easy to find - not that it isn't fun discussing oil all over again!

http://www.triumphrat.net/twins-tech...synthetic.html

http://www.triumphrat.net/twins-tech...o-you-use.html

http://www.triumphrat.net/twins-tech...-oil-talk.html

External Links

http://motorcycleinfo.calsci.com/Oils1.html

http://www.shellusserver.com/ubbthre...age=1#Post3081


Oil Filter Dissection
http://www.triumphrat.net/twins-tech...with-pics.html



Amsoil comparison of motorcycle oils:

http://www.amsoil.com/performancetests/g2156.pdf
Attached Files
File Type: pdf g2156 - amsoil analysis.pdf (1,020.6 KB, 521 views)
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Last edited by propforward; 11-12-2008 at 03:37 PM.
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Old 08-15-2008, 11:20 AM   #4 (permalink)
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Fitting Fork Gaiters

Step by step details by Localmotion411 plus photos. Nice work!

http://www.triumphrat.net/twins-tech...ter-fit-2.html

Another Version by Keef:

http://www.triumphrat.net/twins-talk...tallation.html
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Last edited by propforward; 11-14-2008 at 08:18 AM.
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Old 09-25-2008, 11:18 AM   #5 (permalink)
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Bobbing Fenders and Bodywork Mods

http://www.triumphrat.net/twins-talk...creen-diy.html

Shruums Fender Bob and Lighting Project
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Last edited by propforward; 12-28-2008 at 10:09 AM.
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Old 10-01-2008, 11:16 AM   #6 (permalink)
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Jetting

This is cut and pasted from one of Ventura's posts.
During all of the testing and modding, my Scrambler was fitted with Zard 2:1 exhaust, but the initial results were the same as with NH after-market silencers.
It seems probable therefore that any opened-up exhaust system will give comparable results.
It was also without the AI system.
It was concluded during testing that the type of filter (stock paper or Uni) made no difference to A/F ratio, so this isn't included.
All the below adjustments were made to maintain an A/F ratio of between 13:1 and 13.7:1
This being the considered optimum.

Stock exhaust with snorkel................110 / 40 / no shims / 1.5 turns
Open exhaust + no snorkel................115 / 40 / no shims / 2.0 turns
Above + Restrictor gone....................120 / 40 / 1 shim / 1.0 turns
Above + enlarged filter inlet...............130 / 40 / no shims / 1.75 turns
Above + RHS opened up....................135 / 40 / no shims / 2.0 turns
Above + velocity stacks.....................145 / 40 / no shims / 2.5 turns
With ARK + good pod filters............. >145 / 40 / no shims / 2.5 turns

I hope all of this will be of help as a guide to others who are endeavoring to determine correct jetting following basic modding of the air intake.
Hopefully, as others carry out the A/F gauge install, these figures can in the future be added to / amended / or maybe even totally contradicted!!
More lively discussion to look forward to!!

For reference, Keihin vs Dynojet equivalence. Jets in above table are Keihins:

Keihin ----- DJ
110 ------- 106
112.5 ----- 108
115 ------ 110
117.5 ----- 112
120 ------- 114
122.5 ------116
125 ------- 118
127.5 ------120
130 ------- 122
132.5 ------124
135 ------- 126
137.5 ----- 128
140 ------- 130
142.5 ----- 132
145 ------- 134

Last edited by propforward; 10-12-2008 at 09:18 AM. Reason: added Keihin vs DJ table
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Old 10-06-2008, 09:01 PM   #7 (permalink)
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Maintenance Tips

12000 Mile service overview


Thruxton Valve Adjustment


Cam Cover Oil Leak


Replacing steering stem bearings by Junipero


Replacing the Drive Chain by Baltobonneville


Handy Spreadhseets and resources


Replacing Gear Selector Shaft


Replacing Countershaft Oil Seal


Replacing Brake Pads


Honda / Yamaha equivalent valve shim info


Rear Wheel Removal and Installation


Propforwards tyre changing class


Some thoughts on changing your own tyres


yellowrubiu's centerstand installation tutorial


Replacing fork seals


100,000 mile report
Attached Files
File Type: pdf triumph service checklist.pdf (43.9 KB, 2463 views)
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Last edited by propforward; 03-12-2009 at 08:01 AM.
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Old 11-07-2008, 08:23 PM   #9 (permalink)
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Engine Modifications

Article on High Performance Engine Building


TPUSA high compression piston and cam kit



Camshaft

Scrambler 790 Inlet Cam Part 1 by JohnyC

Scrambler 790 Inlet Cam Part 2 by Ventura

Thunderbike Cams Discussion


Clutch

Changing Clutch Springs Without Dumping the Engine Oil

Views on Green Barnett Clutch Springs

Pictures of Barnett Green Clutch Springs

Fitting a Barnett Clutch by Ventura

Carburettors

FCR 39 Overview
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Last edited by propforward; 04-17-2009 at 10:18 PM.
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Old 11-08-2008, 08:38 AM   #10 (permalink)
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Luggage and Storage

Pepe's Seat Trunk Modification


Travel Trunk on Thruxton


Triumph City Bags Review


Tool Carrier for use with ARK


Another toolbox for use with ARK - by propforward


Another Toolbox for use with ARK - by Kframe


Under Seat Tool Tray


Luggage Thread


Scrambler Luggage


Triumph vs Cortech plus other luggage


Saddlebag support for triumph grabrail


Cortech Bags review


Mounting Harbags to MC resources rack - by Calliway


Pelican Cases as Panniers


Hard Bags on a Bonnie


Givi Luggage Options


Soft Bags on a Scrambler
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Last edited by propforward; 03-21-2009 at 09:31 AM.
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