Rough running in the rain fix - Triumph Forum: Triumph Rat Motorcycle Forums
Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.
Sponsored by: Long Beach Motorsports

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 12-06-2012, 05:26 PM Thread Starter
Senior Member
Supersport 600
Main Motorcycle: 2011 Bonneville SE
 
Join Date: Jun 2012
Location: Canada
Posts: 160
Rough running in the rain fix

Here is a tip I got from a veteran wrench who owns a newish Speedmaster. The engine was coughing, farting and stalling in wet weather. The guy traced it to the fuel overflow/breather tube that descends from under the tank and drains low down on the right side. The setup is the same on my 2011 Bonneville SE. Anyway, the front tire was throwing up water into the bottom end of the tube, causing an obstruction in the line and a vacuum in the fuel tank that eventually impeded fuel delivery and led to coughing and farting. The guy corrected it by trimming the tube at an angle, with the opening toward the back. Probably it is best done preemptively.

It occurs to me that this could be an issue on almost any bike with the breather tube thus situated, as it usually is.
Prairie Wrench is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 12-06-2012, 07:45 PM
Lifetime Premium
Site Supporter
Nova
Main Motorcycle: 2009 Bonneville SE
 
Forchetto's Avatar
 
Join Date: Jun 2009
Location: Asturias, Spain
Posts: 16,708
Other Motorcycle: Yamaha XV1100
Extra Motorcycle: Qingqi QM200GY-BA
Thanks. Good reminder of a problem that's been with us for some time. The Factory still doesn't get it, even though slash cuts in carb, tank, battery, etc drain hoses are normal practice in Japanese bikes.

The problem is talked about on this thread both in the original post and further on post 11 with photos courtesy of member Verde:

http://www.triumphrat.net/twins-tech...-and-tips.html
Forchetto is offline  
post #3 of 3 (permalink) Old 12-06-2012, 10:18 PM Thread Starter
Senior Member
Supersport 600
Main Motorcycle: 2011 Bonneville SE
 
Join Date: Jun 2012
Location: Canada
Posts: 160
I figured someone else might have thought of this, but I hadn't seen it in the forum. Funny, though, that Triumph engineers would not have picked up on it as the Japanese apparently have.
Prairie Wrench is offline  
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:
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Running Rough in the Rain eelmgren Hinckley Classic Triples 1 08-14-2012 01:24 PM
running a little rough after the rain rug rats Sprint Forum 16 12-22-2011 05:21 PM
rough running budfin Vintage Technical Tips & Tricks 1 05-15-2011 01:50 AM
05 running rough- TPS? Anthouse Tiger Workshop (archive) 6 04-23-2011 03:05 AM
new and rough running? maxed66 Speed Triple Forum 2 06-21-2006 05:39 PM

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

 
For the best viewing experience please update your browser to Google Chrome