ADVrider

Go Back   ADVrider > Bikes > Road warriors
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-02-2013, 07:32 PM   #1
indr OP
.
 
Joined: Feb 2010
Location: mom's ovaries & dad's balls
Oddometer: 1,197
Throttle Sync

I've read that a good way to do this is to use an infrared thermometer pointed at the headers. See what the difference is between the two and adjust accordingly.

Q1) What temperature should I be looking at?

Q2) How much of a difference is okay?

Q3) Is this an accurate way to adjust carb sync?
indr is offline   Reply With Quote
Old 07-02-2013, 08:17 PM   #2
JimVonBaden
"Cool" Aid!
 
JimVonBaden's Avatar
 
Joined: Feb 2005
Location: Alexandria, VA
Oddometer: 48,061
From the info you gave, yes, or no, or both.

How about a year, make and model to give us a clue what you are looking to figure out?

Jim
JimVonBaden is offline   Reply With Quote
Old 07-02-2013, 08:38 PM   #3
H96669
A proud pragmatist.
 
H96669's Avatar
 
Joined: Nov 2009
Location: Hiding off Hwy 6, B.C.
Oddometer: 4,296
Not with my IR thermometer. Hi spec isn't high enough to take temps of headers, will just decalibrate it and then would have to wait 1/2 hr until it recalibrates and is useable again.

Expensive them IR thermometers that will read really high temps such as headers temps.
__________________
Have tools, will travel!
H96669 is online now   Reply With Quote
Old 07-02-2013, 09:14 PM   #4
indr OP
.
 
Joined: Feb 2010
Location: mom's ovaries & dad's balls
Oddometer: 1,197
The bike is a 2010 Ninja 250R. Carbed. I adjusted the throttle valves when I had them off. Eyeballed till the both valves opened the same amount for any setting. I.e. they were parallel.

Don't know what I'm trying to figure out. Maybe, what's the most convenient way to make sure the same fuel/air mixture going to both cylinders?

I saw a keychain IR thermo at Lordco. About $20 and they said it's good for header temps. Don't know if truth or not.
indr is offline   Reply With Quote
Old 07-02-2013, 10:09 PM   #5
H96669
A proud pragmatist.
 
H96669's Avatar
 
Joined: Nov 2009
Location: Hiding off Hwy 6, B.C.
Oddometer: 4,296
You need some kind of vacuum balancer, there are a few out there. Not lending my old mercury filled for safety concerns.

Exhaust temps may work. Could be slow, takes a while for the pipes to show temperature changes. In any case and I looked it up recently 7-800F seems average but they can go much higher than that.I doubt you can fine tune anything that way but could be good enough all things considered.

I think you need expert help. I heard good from these guys:

http://motomethod.com/
__________________
Have tools, will travel!
H96669 is online now   Reply With Quote
Old 07-03-2013, 04:38 AM   #6
PeterW
Beastly Adventurer
 
Joined: Nov 2005
Location: Gold Coast
Oddometer: 2,383
Harmonizer - see vendors.

Like hens teeth, but make this trivially easy.

Pete
PeterW is offline   Reply With Quote
Old 07-03-2013, 04:55 AM   #7
showkey
Beastly Adventurer
 
Joined: Jun 2007
Location: Northern , IL
Oddometer: 1,720
Side note.......IR temp readings from a shiny surface are not accurate.

The rest questions have been answered, some sort of vacuum gauges is the preferred method for carb sync.
__________________
1982 CX500 Turbo ,2006 ST1300, 2012 NC700X
1971 CT90,1981 C70, 1986 TRX 250,
1993 TRX300 4X4, 2001 TRX500 4x4, 1987 XR250L
showkey is online now   Reply With Quote
Old 07-03-2013, 05:35 AM   #8
LuciferMutt
Rides slow bike slow
 
LuciferMutt's Avatar
 
Joined: Aug 2008
Location: New(er) Mexico
Oddometer: 10,770
First I've ever heard of doing it that way

Just get a vacuum balancer. Morgan Carbtunes are the best, IMHO.

Don't bother trying to make your own -- all that stuff on the Ninja 250 forums about homemade systems is a waste of time and materials -- they never work well enough to get a decent result.
__________________
You couldn't hear a dump truck driving through a nitro glycerin plant!

Badasses might screw with another badass. Nobody screws with a nut job. -- Plaka
LuciferMutt is offline   Reply With Quote
Old 07-03-2013, 09:31 AM   #9
ericrat
Beastly Adventurer
 
Joined: May 2007
Location: Cincinnati, OH
Oddometer: 1,082
Taking the header temp would tell you much more about the mixture screw setting than the throttle body sync.

The IR temp gauge can be useful as a troubleshooting tool, especially on bikes with lots of cylinders. If one header is substantially different in temp, then you can focus on what is going on with that carb. I can't imagine it being accurate enough or informative enough to adjust anything.

I don't think the IR gun will help you much.

You can search DIY carb sync for instruction to make you own carb sync tool with some clear tubing and a yardstick. There is a "deluxe" version where you connect the two tubes to each other with a small aquarium air valve at the top. A cross-over for lack of a better description. You start with the valve open then slowly close it to increase the sensitivity. That is a nice feature especially when the carbs are way out.

Eric
__________________
Have you visited ride reports lately ?. click HERE
ericrat is offline   Reply With Quote
Old 07-07-2013, 05:13 PM   #10
DrMoto
Adventurer
 
Joined: Aug 2011
Location: California, USA
Oddometer: 26
I made my own manometer with four ports to sync an inline-4 after my expensive carb-sync tool failed. Mine was cheap, easy to make, and is quite effective. Lots of pics out there to give you ideas.
__________________
'00 KLR250
'07 FJR1300
DrMoto is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 08:16 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014