spark plug color, what color is good in your oppinions - Yamaha Raptor Forum

» Recent Threads
App and harness for...
Today 01:38 AM
Today 02:45 AM
1 Replies, 19 Views
Rear disc question
12-17-2014 08:54 PM
by Morris
Last post by CHIMBAZOID
Today 12:10 AM
4 Replies, 58 Views
Aftermarket coil?
Yesterday 09:49 PM
Last post by raptor700rnut
Today 12:07 AM
1 Replies, 37 Views
Upgrading
Yesterday 04:51 PM
by Dan1066
Last post by raptor700rnut
Today 12:00 AM
1 Replies, 45 Views
wheel hub castle nut?
12-17-2014 11:15 PM
by w_caven
Last post by w_caven
Yesterday 11:53 PM
5 Replies, 49 Views
please help!!!!!!!
12-17-2014 05:49 PM
by nell808
Last post by nell808
Yesterday 11:31 PM
9 Replies, 94 Views
660 or 700 build?
Yesterday 03:32 AM
by tmurph
Last post by tmurph
Yesterday 11:24 PM
16 Replies, 195 Views
changing valve guide +...
06-19-2014 12:17 AM
Last post by willykiller
Yesterday 10:12 PM
95 Replies, 3,098 Views
stock header?
Yesterday 11:53 AM
Last post by DEZPERADO
Yesterday 06:25 PM
4 Replies, 80 Views
Raptor 660 won't start
Yesterday 02:59 PM
Last post by willykiller
Yesterday 05:06 PM
1 Replies, 29 Views
» Sponsors
Go Back   Yamaha Raptor Forum > Raptor 660 Categories > General 660 Discussion

Reply
 
LinkBack LinkBack Thread Tools Display Modes
Old 05-25-2008, 02:55 PM   #1 (permalink)
Member
 
Join Date: Mar 2008
Posts: 82
Default spark plug color, what color is good in your oppinions

hey everybody, i jus tuned my carbs again because i had them rich, and the spark plug was black. i dropped the needles and now its running the best its ever ran. my question is the spark plug is like a gray smokey color, i was jus wondering if its a good color, the porcelein isnt white so i know its not running to lean, but jus wondering if anybody elses is that color, thanks
Rptr660r is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-25-2008, 04:18 PM   #2 (permalink)
Member
 
Big_D's Avatar
 
Join Date: May 2008
Posts: 34
Default Re: spark plug color, what color is good in your oppinions

A light gray to tan is what you should be shooting for...


Big_D is offline   Reply With Quote
Old 05-25-2008, 04:58 PM   #3 (permalink)
Senior Member
 
R1rider98's Avatar
 
Join Date: Aug 2007
Posts: 880
Default Re: spark plug color, what color is good in your oppinions

He is right.
__________________
'07 700 Raptor: Pc3, Barker Duals, Trinity Pro Intake, w/K&N w/outerwears, no lid, SE Shocks, Scotts Dampner, GYTR nerfbars, a-arm guards and shock covers.
R1rider98 is offline   Reply With Quote
Old 05-25-2008, 07:52 PM   #4 (permalink)
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,179
Default Re: spark plug color, what color is good in your oppinions

A little grey is too lean my boys, you want it very light brown to white, grey is leaner yet and then if you are leaner then that the plug turns black again.
__________________

686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline   Reply With Quote
Old 05-25-2008, 07:55 PM   #5 (permalink)
Senior Member
 
evlls1's Avatar
 
Join Date: Apr 2007
Posts: 7,470
Send a message via AIM to evlls1 Send a message via Yahoo to evlls1
Default Re: spark plug color, what color is good in your oppinions

a shop rap7 talked to said telling by the plug is about outdated with newer motors... it can help telling in extremes... extreme rich/lean.. but to be completely accurate you need to monitor the air/fuel ratio. think that was the gist of what he told nick... maybe he'll chime in if i missed more
__________________
http://www.keepbringingit.com
evlls1 is offline   Reply With Quote
Old 05-25-2008, 08:00 PM   #6 (permalink)
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,179
Default Re: spark plug color, what color is good in your oppinions

Maybe it is but it sure beats guessing, I also look at the electrode and watch the colours there.

A sparkplug rep from NGK imformed me last year in a seminar that reading plugs was the only way to tell how an engine was doing internally, and also how well each cylinder was performing, the only other way would be to hook up and oxygen sensor to each cylinder, in multiple cylinder arrangements and diagnose each cylinder individually, he worked with Formula 1 and Nascar setting up there race cars by tuning with sparkplugs.
__________________

686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline   Reply With Quote
Old 05-25-2008, 08:02 PM   #7 (permalink)
Senior Member
 
evlls1's Avatar
 
Join Date: Apr 2007
Posts: 7,470
Send a message via AIM to evlls1 Send a message via Yahoo to evlls1
Default Re: spark plug color, what color is good in your oppinions

yeah that's why i have a wideband kit to monitor air / fuel with an 02 sensor
__________________
http://www.keepbringingit.com
evlls1 is offline   Reply With Quote
Old 05-25-2008, 08:05 PM   #8 (permalink)
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,179
Default Re: spark plug color, what color is good in your oppinions

Quote:
Originally Posted by evlls1
yeah that's why i have a wideband kit to monitor air / fuel with an 02 sensor
Now lets say you have a multiple cylinder arrangement and you hook up your air fuel moniter, it will give the results of all cylinders combined, and lets say that a couple cylinders are running rich and a couple are lean, how would the sensor know which ones are lean and which ones are rich?
__________________

686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline   Reply With Quote
Old 05-25-2008, 08:20 PM   #9 (permalink)
Senior Member
 
evlls1's Avatar
 
Join Date: Apr 2007
Posts: 7,470
Send a message via AIM to evlls1 Send a message via Yahoo to evlls1
Default Re: spark plug color, what color is good in your oppinions

well on a vehicle you mount two air fuel gauges. With two gauges you can view four parameters at a time, but you can set it to cycle through your list of paramaeters and their their cycle time each. helps monitor everything once you start doing heavy modding so you know what's going on http://www.xtreemkreations.com/Gauge1.jpg
__________________
http://www.keepbringingit.com
evlls1 is offline   Reply With Quote
Old 05-25-2008, 09:10 PM   #10 (permalink)
Member
 
Big_D's Avatar
 
Join Date: May 2008
Posts: 34
Default Re: spark plug color, what color is good in your oppinions

Let's see if we can pull this back in a little... here's one of the better charts I found online when I was looking a few weeks ago:



http://www.4secondsflat.com/plug_chart.html



You can click on them to get a close up


Big_D is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

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 On
Pingbacks are On
Refbacks are On
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 06:54 AM.




Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.1
Content Relevant URLs by vBSEO 3.6.1
RaptorForum.com is an independent Yamaha enthusiast website. Content on RaptorForum.com is generated by its users and RaptorForum.com is not in any way affiliated with Yamaha Motor Corporation, U.S.A.
Inactive Reminders By Mished.co.uk and FTP-Anime.com