Ball bearing throttle mod (Boring!) - Page 2 - 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 11-21-2012, 02:35 PM   #11 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: Thruxton 04
 
Join Date: Nov 2010
Location: Woodbury, Devon
Posts: 431
Other Motorcycle: Ariel VHA Special
Extra Motorcycle: Honda Pan European ST1300
On a Thruxton you could fit a Doherty replca type twist grip with a bit of mod. to the cables these have the friction device fitted to to the barrel only7/8 bar diam
tonupdave is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-24-2012, 03:32 PM   #12 (permalink)
Senior Member
Supersport 600
Main Motorcycle: 2012 Thruxton
 
ClimberClint's Avatar
 
Join Date: Mar 2012
Location: Phoenix, AZ
Posts: 195
Other Motorcycle: 2002 Yamaha YZ250
Extra Motorcycle: 2012 T100 Bonneville
OMG! Brilliant! Not boring in the least! This is my next project. Thank you so much for sharing the details!


Sent from my iPhone using Motorcycle.com App
ClimberClint is offline   Reply With Quote Quick reply to this message
Old 11-25-2012, 08:56 AM   #13 (permalink)
Lifetime Premium
Site Supporter
Pole Position
Main Motorcycle: 2010 Bonneville T100
 
Join Date: Mar 2010
Location: Philadelphia, PA USA
Posts: 3,223
Other Motorcycle: 2007 150cc Retro-scooter
As always, a wonderful and informative post. Your modesty does you credit, but your tech posts are never boring even if I probably won't use it. I did discover what you said about a throttle lock stopping it; I have the Kaoko Cruise Control (NewBonneville.com), and in the process of installing it and getting it to work, wound up taking all that play out without even realizing it. It operates by putting pressure on the end of the throttle tube, so that had to be adjusted until it would slide smoothly when lock was not engaged, while holding it when it was. I also put gel grips on, and hand numbness even on long rides is a thing of the past.
__________________
There is a fine line between "hobby", and "mental illness"
Owenbrau is offline   Reply With Quote Quick reply to this message
Old 11-25-2012, 11:29 AM   #14 (permalink)
Senior Member
World SuperBike
Main Motorcycle: Triumph Thruxton EFi
 
Join Date: Nov 2010
Location: Preston, North West UK
Posts: 1,934
Other Motorcycle: Yamaha R1, Honda CB1000R
Quote:
Originally Posted by Forchetto View Post
I didn't bother, 9-10mm is hardly noticeable. The original product from Arlen Ness does advise you to cut off a bit from the throttle side of the handlebar though.
I guess if that were seen as a problem one could cut 10mm off the end of the h'bar and use a 5mm spacer instead of 15 so keeping twist-grip in the same position.
You could also use the same mod for 1" h'bars using the same bearing by machining up a bush with ID equal to the bearing OD and OD equal to the throttle sleeve ID.
I'd be tempted to look at making up a PTFE sleeve for the inner end of the twist girp.
I'd also leave the thread at 5mm also rather than modify it.

Do you feel a benefit to your riding or is it more a case of feeling more sophisticated?
GDCobra is offline   Reply With Quote Quick reply to this message
Old 11-25-2012, 01:05 PM   #15 (permalink)
Lifetime Premium
Site Supporter
Legend
Main Motorcycle: 2009 Bonneville SE
 
Forchetto's Avatar
 
Join Date: Jun 2009
Location: Asturias, Spain
Posts: 13,532
Other Motorcycle: Yamaha XV1100
Extra Motorcycle: Qingqi QM200GY-BA
Quote:
Originally Posted by GDCobra View Post
I guess if that were seen as a problem one could cut 10mm off the end of the h'bar and use a 5mm spacer instead of 15 so keeping twist-grip in the same position.
You could also use the same mod for 1" h'bars using the same bearing by machining up a bush with ID equal to the bearing OD and OD equal to the throttle sleeve ID.
I'd be tempted to look at making up a PTFE sleeve for the inner end of the twist girp.
I'd also leave the thread at 5mm also rather than modify it.

Do you feel a benefit to your riding or is it more a case of feeling more sophisticated?
Thanks for your comments. Once long term testing is completed I might do what you suggest: cut a bit off the bars and shorten the spacer.

I had already drilled and tapped the threaded bar insert to experiment with different bar-end weights. If I hadn't, then I would need a bearing with a smaller inner race diameter and I couldn't see any in the bearing listings. The closest was 7mm ID and I made up the difference between the M6 bolt and those 7mm with a plastic sleeve made, once more, out of a short piece of heat shrinkable sleeving.

The previous experiment involved a much heavier weight and the "Throttle wank" mod, and that worked well. I'm now running with more or less the standard weight and the wank mod.

I may increase the bar-end weight a little, as this morning I got a twitch of sleepy hand after about 80 km. The throttle action is a bit smoother and feels more precise and controllable when negociating slippery surfaces like fallen leaves and twigs at this time of year. It could be a placebo effect I suppose, but it does feel nice. I've always kept things like the throttle cables, mechanism, cam and sleeve well greased anyway, so the improvement is marginal.

Last edited by Forchetto; 11-25-2012 at 01:09 PM.
Forchetto is offline   Reply With Quote Quick reply to this message
Old 11-25-2012, 02:03 PM   #16 (permalink)
Senior Member
World SuperBike
Main Motorcycle: Triumph Thruxton EFi
 
Join Date: Nov 2010
Location: Preston, North West UK
Posts: 1,934
Other Motorcycle: Yamaha R1, Honda CB1000R
Quote:
Originally Posted by Forchetto View Post
Thanks for your comments. Once long term testing is completed I might do what you suggest: cut a bit off the bars and shorten the spacer.

I had already drilled and tapped the threaded bar insert to experiment with different bar-end weights. If I hadn't, then I would need a bearing with a smaller inner race diameter and I couldn't see any in the bearing listings. The closest was 7mm ID and I made up the difference between the M6 bolt and those 7mm with a plastic sleeve made, once more, out of a short piece of heat shrinkable sleeving.
Well my thoughts were that I'd make the spacer stepped so that it has a diameter to engage with the inner race and a close fit hole in the centre for the bolt so allowing the bar thread to remain unchanged (but if you'd already made modifications that's a good reason why not) and also centring the assembly.

Quote:
Originally Posted by Forchetto View Post
The previous experiment involved a much heavier weight and the "Throttle wank" mod, and that worked well. I'm now running with more or less the standard weight and the wank mod.

I may increase the bar-end weight a little, as this morning I got a twitch of sleepy hand after about 80 km. The throttle action is a bit smoother and feels more precise and controllable when negociating slippery surfaces like fallen leaves and twigs at this time of year. It could be a placebo effect I suppose, but it does feel nice. I've always kept things like the throttle cables, mechanism, cam and sleeve well greased anyway, so the improvement is marginal.
Yeah, best to keep wanking and throttle control for separate times, I may have a look into something similar over the winter if I can get a few other projects out of the way.
GDCobra 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
Boring throttle bodies HGaither Twins Technical Talk 8 12-18-2010 07:47 AM
Boring a 675? Petie Daytona675 Forum 20 02-12-2010 09:53 AM
What size ball bearing? NYCyclist Twins Technical Talk 7 03-28-2008 10:20 PM
Boring day ricster Sprint Forum 5 08-01-2007 03:46 PM
Boring pa_hawkeye Sprint Forum 37 02-16-2005 04:15 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 09:54 AM.



Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR 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

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Search Engine Optimization by vBSEO 3.6.0