How to rejet a carb - should I go to the dealer? - 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

Cruisers - America, Speedmaster Cruiser chat for America and Speedmasters

Reply
 
LinkBack Thread Tools Display Modes
Old 07-21-2012, 01:24 AM   #1 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 2014 Street Triple R
 
PTwin's Avatar
 
Join Date: Jul 2012
Location: Boston
Posts: 523
How to rejet a carb - should I go to the dealer?

I got new exhaust pipes coming in this week that require a carb rejet. I'm a bit of an amature with wrenching. Is this a job I should do myself, or have a dealer do?

Anyone got a good DIY guide on speedmaster rejet?
PTwin is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-21-2012, 06:25 PM   #2 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: Triumph/Victory/H-D
 
JasonSonofEd's Avatar
 
Join Date: Jan 2012
Location: USA
Posts: 104
http://www.bonnevilleamerica.com/din...ph/carbs1.html
__________________
08 Triumph SpeedMASTER
JasonSonofEd is offline   Reply With Quote Quick reply to this message
Old 07-21-2012, 06:38 PM   #3 (permalink)
Banned
Formula Extreme
Main Motorcycle: custom harley
 
Join Date: Jun 2012
Location: Shingletown CA
Posts: 947
Other Motorcycle: 71 TR6
Extra Motorcycle: varies
IF you get the jetting wrong you could be replacing/rebuilding the whole engine. Are you comfortable doing this yourself, knowing the consequences of not getting it right?

No matter how good the advise is, or is not, this is something that is best done by professionals or under the supervision of a professional. I even recently saw a tech school graduate really mess a jetting up (we fired him the next day)
Lee H is offline   Reply With Quote Quick reply to this message
Old 07-22-2012, 12:28 AM   #4 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: Triumph/Victory/H-D
 
JasonSonofEd's Avatar
 
Join Date: Jan 2012
Location: USA
Posts: 104
Lee what ever dude PTwin get a buddy and follow the link I gave you or if Lee H has you shaking in your boots take it to a shop they will be more then glad to take an easy 200$ from you

http://www.bonnevilleamerica.com/dinqua/index.html

Here is a better good jetting calculator too!
__________________
08 Triumph SpeedMASTER

Last edited by JasonSonofEd; 07-22-2012 at 12:33 AM.
JasonSonofEd is offline   Reply With Quote Quick reply to this message
Old 07-22-2012, 02:32 AM   #5 (permalink)
Banned
Formula Extreme
Main Motorcycle: custom harley
 
Join Date: Jun 2012
Location: Shingletown CA
Posts: 947
Other Motorcycle: 71 TR6
Extra Motorcycle: varies
I am not forcing anyone to listen to me... But consider this. Shops like mine do charge extra for redoing customer repairs and mods...and not a single week goes by, when I don't get something that a customer has worked on... Care to venture a guess at how often they got advise from the internet experts?
Lee H is offline   Reply With Quote Quick reply to this message
Old 07-22-2012, 11:45 AM   #6 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: Triumph/Victory/H-D
 
JasonSonofEd's Avatar
 
Join Date: Jan 2012
Location: USA
Posts: 104
True Lee H don't get me wrong it could go wrong but he ask for DIY guide ask around most would agree the link I listed is pretty kick butt on
__________________
08 Triumph SpeedMASTER
JasonSonofEd is offline   Reply With Quote Quick reply to this message
Old 07-22-2012, 11:22 PM   #7 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 2014 Street Triple R
 
PTwin's Avatar
 
Join Date: Jul 2012
Location: Boston
Posts: 523
Thanks for the advice guys. That is a really great guide. But for my amateur level of skill it seems like there's a bit too much that can go wrong. I'll probably just do the pipes and have the pros deal with the carb.

Maybe I'll give it a whack next time, when I get a few more skill points in wrenching.
PTwin is offline   Reply With Quote Quick reply to this message
Old 07-23-2012, 11:08 AM   #8 (permalink)
Senior Member
SuperSport
Main Motorcycle: 98 Valkyrie
 
Join Date: Jun 2009
Location: Valley Springs, Ca
Posts: 1,238
Other Motorcycle: 08 Triumph America
PT I think you're making a good decision. While rejetting isn't brain surgery it does require some mechanical skill to get the carbs off. I don't know how far you plan on going with your modifications, but you might want to consider doing away with the air box eventually, which will make changing jets a snap. I'm a far cry from a mechanic, but I've managed to remove my air box and go with pod filters, and now I can rejet in about 30 minutes. You need a decent set of tools, but they're not that expensive, and you probably want to get a set of hex screws to replace the screws that hold your float bowls on. It makes things much easier.

I've found this little twin an easy engine to work on, and when I take my time and think about how to go about it I can do most of the maintenance myself. Lee is right, some things should be left to the professionals, but the more familar you are with your engine the more confident you become and the easier it is to do things yourself.

Just my two cents worth.
__________________
Stan
08 America, Bub slip ons, A/I removed, emissions "stuff" & air box removed, billet intakes, UNI Pods, rejetted, carbs balanced, intminators, Progressive 412's, 1" risers, Corbin seat with driver back rest, TP USA Option 2 Igniter, 813 cams
skromfols is offline   Reply With Quote Quick reply to this message
Old 07-23-2012, 12:00 PM   #9 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 2014 Street Triple R
 
PTwin's Avatar
 
Join Date: Jul 2012
Location: Boston
Posts: 523
Thanks for the encouragement Stan. I'm just getting started with the mods. But I have obsessive perfectionist tendencies when it comes to my toys/hobbies.... I think after the slip-ons I'm going to focus on minor cosmetic stuff at least until next season. Between my new Prog. 440s and D&D silencers, I'm already an extra grand into this thing.

I am still not totally clear on what advantages are gained by removing the air box. Maybe you could fill me in? I'm assuming it will increase HP a bit, require a rejet and lead to a deeper exhaust note?

So here's a follow-up to that. If my aftermarket silencers required a rejet, and then I removed the air box, how would I figure out what size jets to use?
PTwin is offline   Reply With Quote Quick reply to this message
Old 07-23-2012, 12:49 PM   #10 (permalink)
Banned
Formula Extreme
Main Motorcycle: custom harley
 
Join Date: Jun 2012
Location: Shingletown CA
Posts: 947
Other Motorcycle: 71 TR6
Extra Motorcycle: varies
air box removal will have added benefits in Horsepower... in one narrow RPM range.
In order to see a gain in the entire torque curve, there are a lot of other factors to be considered. Everything must be matched up to optimize engine performance. Intake velocity must be matched to jetting, to cam overlap, to the scavenging effect of the exhaust (intake velocity is FAR more important then volume to a street engine. I cannot stress this enough) Then when you get airflow optimized it is time to look at ignition

I am not trying to discourage you. In fact it is quite the opposite...but I am really suggesting that you do some in depth research, first. Then talk to real life bike techs. All engine techs know that most internet experts aren't. Find a tech, in your area, that you can talk to face to face. Ask your questions, and learn about your bike
Lee H 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
07 America carb Rejet? dba6463 The Welcome Center 1 03-22-2012 05:33 PM
Anyone Use a Carb Balancer After a Rejet? Huffer Twins Technical Talk 32 09-12-2008 05:17 PM
Scrambler TORS rejet no rejet? Lefty52 Twins Technical Talk 12 10-29-2007 08:24 AM
Carb rejet ?? TroyH Club Cafe' 3 03-31-2007 06:49 PM
Bike back from dealer service-carb adjustment question Bob_N Twins Talk 4 04-08-2006 10:34 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 06:31 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.