Super Low MPG on '14 Scrambler - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, Bobber, T100, Speedmaster, America, Thruxton, and Scrambler.


Sponsored by: Triumph Twin Power Ltd

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 06-11-2019, 02:26 PM Thread Starter
Grand Prix 125
Member
 
Jaynes's Avatar
 
Join Date: Jan 2018
Posts: 33
Garage
Super Low MPG on '14 Scrambler

Was hoping to get some help trouble shooting my EFI scram and it's low gas mileage. Here's what I know...
I don't always pay attention to my tank mileage, but noticed something seemed off so I tracked the last 4 tanks. I'm averaging 26 MPG. No performance issues noticeable. I have noticed a sporadic ticking noising in my engine though that seems to happen when the motor is at it's hottest. Haven't troubleshot that yet and have no idea if it's actually related or not. Where should I start?

Kyle
Jaynes is online now  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 06-11-2019, 07:56 PM
Formula Extreme
Main Motorcycle: 2015 Triumph Thruxton
Senior Member
 
yrunvs's Avatar
 
Join Date: Feb 2013
Location: Prior Lake Minnesota
Posts: 857
Does your bike have intake/exhaust mods?

TTP Tune#3, NH Toga's.

I'm no Gynecologist but hey I'll take a look.
yrunvs is offline  
post #3 of 8 (permalink) Old 06-12-2019, 12:46 AM Thread Starter
Grand Prix 125
Member
 
Jaynes's Avatar
 
Join Date: Jan 2018
Posts: 33
Garage
Quote:
Originally Posted by yrunvs View Post
Does your bike have intake/exhaust mods?
It’s got the arrow exhaust on it. I bought it used though, so I’m not sure what map or tune was used.

I had my speedo replaced a couple or so months ago by the dealer. Any reason they would’ve had to wipe the CPU (and any custom tunes it had on it) as a part of the install. Maybe they forgot to reload the right map back onto it.

Kyle
Jaynes is online now  
 
post #4 of 8 (permalink) Old 06-12-2019, 06:44 AM
Formula Extreme
Main Motorcycle: 2015 Triumph Thruxton
Senior Member
 
yrunvs's Avatar
 
Join Date: Feb 2013
Location: Prior Lake Minnesota
Posts: 857
That's where I would start. Remap to compensate for whatever mods you have. Check your intake to see what has been changed. TTP makes custom maps to match mods or maybe your dealer can remap.

TTP Tune#3, NH Toga's.

I'm no Gynecologist but hey I'll take a look.
yrunvs is offline  
post #5 of 8 (permalink) Old 06-12-2019, 10:53 AM
Formula Extreme
Main Motorcycle: Triumph Bonneville SE
Senior Member
 
mick 85's Avatar
 
Join Date: Jan 2016
Location: Portishead, England
Posts: 651
Quote:
Originally Posted by Jaynes View Post
I had my speedo replaced a couple or so months ago by the dealer. .
Why was the speedo replaced, and is it showing accurate mileage now ? Might be worth measuring distance travelled by satnav or phone for a while, jus to cross-check. 26mpg seems far too way off the mark, even with the wrong map.

Born to be mild
mick 85 is offline  
post #6 of 8 (permalink) Old 06-12-2019, 12:29 PM Thread Starter
Grand Prix 125
Member
 
Jaynes's Avatar
 
Join Date: Jan 2018
Posts: 33
Garage
Quote:
Originally Posted by yrunvs View Post
That's where I would start. Remap to compensate for whatever mods you have. Check your intake to see what has been changed. TTP makes custom maps to match mods or maybe your dealer can remap.
K. Time to get the TuneECU software I think, so I'll know more about what's going on in the ECU.

Quote:
Originally Posted by mick 85 View Post
Why was the speedo replaced, and is it showing accurate mileage now ? Might be worth measuring distance travelled by satnav or phone for a while, jus to cross-check. 26mpg seems far too way off the mark, even with the wrong map.
Bike wasn't starting and after a bunch of troubleshooting at home, I took it to into the dealer and they found some corrosion in there. They plugged it into a working speedo and it fired right up. Not sure if it's tracking mileage accurately. I'll crosscheck that with my phone.

Thanks!

Kyle
Jaynes is online now  
post #7 of 8 (permalink) Old 06-12-2019, 05:37 PM
Site Supporter
World SuperBike
Main Motorcycle: Bonneville T100 SMQ SE
Lifetime Premium
 
Tornado99's Avatar
 
Join Date: Dec 2014
Location: Vancouver, Canada
Posts: 2,154
Other Motorcycle: 1974 Norton Commando 850
Garage
Check the air intake rubbers and the 3mm vacuum lines running up into the MAP sensors (2). These develop leaks leading to poor fueling and can give rough running/popping out the back etc.
Your TuneECU reading can also help tell various items are giving correct values. The MAP sensors need to be within 10 hPa's of each other. Assuming no leaks, this indicates the throttles need balancing via the white-painted screw sitting between the throttle bodies.

2013 T100 Steve McQueen; +NH Togas; -SAI; -O2; +Breathe; +TTP#3; +Avon RoadRiders; +Iron&Resin Sidebag; +Kisan Auto-Off Indicators & BrakeLight Flasher; +MatchlessClueless LED Brake & Indicators; +LED 3000 Lumens Headlamp; +DeCosse Keyless system
Tornado99 is offline  
post #8 of 8 (permalink) Old 06-13-2019, 10:53 AM
Legend
Main Motorcycle: 2005 Bonneville Blue 790
Senior Member
 
Join Date: Sep 2006
Location: Central Maryland, USA
Posts: 10,060
Other Motorcycle: 1973 CB450, long gone
Maybe you're getting 26 km/liter.

All kidding aside, there actually once was someone on this forum whose odometer somehow got set to kilometers instead of miles.

Marty
2005 Bonneville Blue 790cc, AI removed, Staintunes RC, no snorkel, inlet enlarged, 118/40/NBZT "Thruxton" needles/1 shim/3 turns, Ikon 7610s, Ricor Intiminators, Barnett green springs, Michelin Pilot Activs, D9 gauge panel, tachometer.

Last edited by Baltobonneville; 06-13-2019 at 10:55 AM.
Baltobonneville is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options
All posts must adhere to Forum Rules

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










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



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